Why the SCT?

[chefjason]

Second post for me. Been lurking in here for a few days waiting on my account to activate (why so long? dunno.) and have noticed all the rage about the SCT. Looked it up and saw it is a blank tuner and hemipower writes the tunes for ya. So, why the hype? In other words, can some one here splain, in small words, why the SCT is "better" than a SuperChip, HyperTech, Diablo Predator.....?

Thanks in advance for what ever info I get.

And, please don't hit me with the "do a search" response. I did. lots and lots and lots of threads. And in those threads, lots and lots and lots of post. Easier to just ask and get one response that explains it than to read 500 to get the same info.

[Adobedude]

Second post for me. Been lurking in here for a few days waiting on my account to activate (why so long? dunno.) and have noticed all the rage about the SCT. Looked it up and saw it is a blank tuner and hemipower writes the tunes for ya. So, why the hype? In other words, can some one here splain, in small words, why the SCT is "better" than a SuperChip, HyperTech, Diablo Predator.....?

Thanks in advance for what ever info I get.

And, please don't hit me with the "do a search" response. I did. lots and lots and lots of threads. And in those threads, lots and lots and lots of post. Easier to just ask and get one response that explains it than to read 500 to get the same info.

The SCT can be customized for your truck, ie. your level of mods...As you add more mods, you can get new tunes for the SCT.

The other tuners you mentioned have canned flashes, and you can't change em. From what I've read here, the SCT with it's "canned" flash makes a workl of diff over a Superchips.

I have a SCT for my modded R/T, I Superchips for my stock Ram...I'm selling the Superchips so I can buy another SCT.
I was a naysayer at first, I had a flashed PCM..Broke down and bought an SCT with unlimited tunes from Hemifever, it was worth a couple tenths right outta of the box, probably close to 4 or 5 now...That's a big diff.

[WeezyRT]

True and the SCT "canned" tunes are still written for YOUR mods unlike Superchips and Hypertech which are just the same generic tune for everyone.

[360 XRT]

sorry for thread jacking,but would it be worth dumping my mopar perf. ECU for a SCT tuner.this is for a truck that runs 14.80's now and am looking for 13.90-14.00 flat after rebuild.do i need to retain the stock ECU or mopar ECU for piggybacking the SCT ? and what would the total $$$$ amout be for an SCT with download ?

[RJ_Hythloday]

sorry for thread jacking,but would it be worth dumping my mopar perf. ECU for a SCT tuner.this is for a truck that runs 14.80's now and am looking for 13.90-14.00 flat after rebuild.do i need to retain the stock ECU or mopar ECU for piggybacking the SCT ? and what would the total $$$$ amout be for an SCT with download ?

Don't forget you'll need a data logger also, at least 7-800 if you get stuff on sale.

[Adobedude]

Don't forget you'll need a data logger also, at least 7-800 if you get stuff on sale.

Or get a couple Dyno pulls to get AF reading, that's all I did. Cost me 50 bucks.

[grapejuice1998]

sorry for thread jacking,but would it be worth dumping my mopar perf. ECU for a SCT tuner.this is for a truck that runs 14.80's now and am looking for 13.90-14.00 flat after rebuild.do i need to retain the stock ECU or mopar ECU for piggybacking the SCT ? and what would the total $$$$ amout be for an SCT with download ?

It depends on who tunes it and how successful they are.

Personally, I have never had an SCT tune that matched, or beat the MP PCM.

[RJ_Hythloday]

Or get a couple Dyno pulls to get AF reading, that's all I did. Cost me 50 bucks.

That's cheaper than I thought for a dyno pull.

[Adobedude]

That's cheaper than I thought for a dyno pull.

3 pulls 50.00 bucks...They even let me drive it... :biggthumpup:

[360 XRT]

It depends on who tunes it and how successful they are.

Personally, I have never had an SCT tune that matched, or beat the MP PCM.

enuff said,i'll stick with the MP ecu and try to hunt down an R/T+10 cam.

[ADakotaRTGuy]

enuff said,i'll stick with the MP ecu and try to hunt down an R/T+10 cam.

SCT Tuned on my truck. There is nothing out there that can touch it except for a stand alone system. Mopar Performance might be good, but I bet if you datalogged it there would be room for improvement. Plus you can sell the MP ECU and put the stock one back in and just buy the SCT for a couple hundred bucks.

[ADakotaRTGuy]

It depends on who tunes it and how successful they are.

Personally, I have never had an SCT tune that matched, or beat the MP PCM.

Who has tuned for you? I am assuming you have had SCT on your truck and did back to back runs with them after the tune got nailed down. That is a bold statement I think.

[360 XRT]

heres the thing,i sold the factory ecu years ago.i'd hate to take 2 steps back to go 3 forward.

[Adobedude]

heres the thing,i sold the factory ecu years ago.i'd hate to take 2 steps back to go 3 forward.

Then put a bigger cam in it...

[jmaack727]

I went from MP pcm to sct definitely better than the mp one

[ADakotaRTGuy]

heres the thing,i sold the factory ecu years ago.i'd hate to take 2 steps back to go 3 forward.

Sell yours with a trade for stock one. Do you ever plan on going big sct is the ticket. If not just go mopar pcm.

[Adobedude]

I went from MP pcm to sct definitely better than the mp one

I've picked up 4 tenths with the SCT....B&G never got it right. I was always bouncing off the stock rev limiter, it ran so rich I cooked the ceramic coating off my headers....It was frustrating, they never listened to me, never told me what they did...The head guy is dick on the phone....

Hemifever and the SCT is the only reason I didn't toss my PCM in the trash and go carbed.

[dakfink]

I've picked up 4 tenths with the SCT....B&G never got it right. I was always bouncing off the stock rev limiter, it ran so rich I cooked the ceramic coating off my headers....It was frustrating, they never listened to me, never told me what they did...The head guy is dick on the phone....

Hemifever and the SCT is the only reason I didn't toss my PCM in the trash and go carbed.

That's why he is no longer involved in SCT.

He was initially in on SCT. but things didn't go HIS way from my understanding now he's back to 1/2 assing flashes.

[dakfink]

heres the thing,i sold the factory ecu years ago.i'd hate to take 2 steps back to go 3 forward.

Call Hemifever and see what he has to say?

I think you can use SCT with a MP PCM. But not 100% on that?

[Sick 660r]

That's why he is no longer involved in SCT.

He was initially in on SCT. but things didn't go HIS way from my understanding now he's back to 1/2 assing flashes.

HAHAHA It wouldnt surprise me.

[Adobedude]

That's why he is no longer involved in SCT.

He was initially in on SCT. but things didn't go HIS way from my understanding now he's back to 1/2 assing flashes.

I knew he was initially involved, didn't know what happened....But he (Dave) was a fucking dick. One reason I was a non believer at first..

[sunike32]

Anyone know if the SCT "special" pricing is still in effect? I recall reading the sale was ending a couple different times. I know the first time it was extended, so I'm curious if it has officially ended or not? I know I can just email Sean and find out, but thought someone on here would know :biggthumpup:

[RJ_Hythloday]

Anyone know if the SCT "special" pricing is still in effect? I recall reading the sale was ending a couple different times. I know the first time it was extended, so I'm curious if it has officially ended or not? I know I can just email Sean and find out, but thought someone on here would know :biggthumpup:
I bought mine Dec 12th the deadline had supposedly been moved to the 18th according to the person I bought mine from.

[jmaack727]

I've picked up 4 tenths with the SCT....B&G never got it right. I was always bouncing off the stock rev limiter, it ran so rich I cooked the ceramic coating off my headers....It was frustrating, they never listened to me, never told me what they did...The head guy is dick on the phone....

Hemifever and the SCT is the only reason I didn't toss my PCM in the trash and go carbed.

Only thing I dont care for is the shift points, and it seems to run very richat WOT
Ill take care of that at a later date though.

[chefjason]

sorry for thread jacking,but would it be worth dumping my mopar perf. ECU for a SCT tuner.this is for a truck that runs 14.80's now and am looking for 13.90-14.00 flat after rebuild.do i need to retain the stock ECU or mopar ECU for piggybacking the SCT ? and what would the total $$$$ amout be for an SCT with download ?

Man you weren't kidding! You totally jacked me.:jerkit:

But, I did get the answers I was looking for. I plan to tinker with this truck for the next three years with my son and then he will buy it for his 16th b-day from me. That way he knows the truck, I know the truck and he has pride in it so he wont go out and trash it first thing. Since I do plan on making many mods, I suppose the SCT is the way to go.

[dakfink]

SCT Tuned on my truck. There is nothing out there that can touch it except for a stand alone system. Mopar Performance might be good, but I bet if you datalogged it there would be room for improvement. Plus you can sell the MP ECU and put the stock one back in and just buy the SCT for a couple hundred bucks.

I've been around just about everything out there for tuning. You basically got 4 levels.

Generic tunes: Hypertech, Superchips

Canned tunes: SCT, Diablo, B&G flash/ Fox Flash.

Self tuners for Factory PCM/ECM/ECU: SCT-prp, LS-1 Edit, HP Tuner

Stand Alones: BS3, Fast, Accel, Mega Squirt, Motec, AEM, & others

Stand alones are the Best but Tuning the Factory PCM is good for most!!! If your not going over 14psi boost and 7000+ rpms SCT should cover anything you need.

If your not getting on a Dyno and tuning you always leave a bit on the table.

HemiFever seems to have nailed it pretty good though. But you definitely have to give him all the info he asks for.

As many people as I see modifying Magnum Motors even in other vehicles I'm surprised not more tuners have gotten involved ??

LA blocks are actually starting to dry up, but Magnum Motors are plenty and cheap. Anything you do with 1 you can do with the other.

[chefjason]

I've been around just about everything out there for tuning. You basically got 4 levels.

Generic tunes: Hypertech, Superchips

Canned tunes: SCT, Diablo, B&G flash/ Fox Flash.

Self tuners for Factory PCM/ECM/ECU: SCT-prp, LS-1 Edit, HP Tuner

Stand Alones: BS3, Fast, Accel, Mega Squirt, Motec, AEM, & others

Stand alones are the Best but Tuning the Factory PCM is good for most!!! If your not going over 14psi boost and 7000+ rpms SCT should cover anything you need.

If your not getting on a Dyno and tuning you always leave a bit on the table.

HemiFever seems to have nailed it pretty good though. But you definitely have to give him all the info he asks for.

As many people as I see modifying Magnum Motors even in other vehicles I'm surprised not more tuners have gotten involved ??

LA blocks are actually starting to dry up, but Magnum Motors are plenty and cheap. Anything you do with 1 you can do with the other.

So, say I get the SCT from Hemi and then make another mod or two after. Then I hit the dyno, how do i make the adjustments with the SCT?

[Adobedude]

You email the data logs to Hemifever. HE changes the tune and sends it back.

He goes by your AF & RPMS...He also likes throttle position. You have to provide other info like where it's shifting etc...He'll play it safe on the rev limiter though unless you something to cut RPMs off, like a MSD 6al. He doesn't want you to blow your motor.

We played around with a couple different tunes, the one I'm using now was quickest at the track.

He sends an email tune, you load it into the tuner...Nothing goes through snail mail.

[Adobedude]

Only thing I dont care for is the shift points, and it seems to run very richat WOT
Ill take care of that at a later date though.

Have Sean change it...

One reason I went with a 727...No more PCM controlled shifts for me :biggthumpup:

[chefjason]

You email the data logs to Hemifever. HE changes the tune and sends it back.

He goes by your AF & RPMS...He also likes throttle position. You have to provide other info like where it's shifting etc...He'll play it safe on the rev limiter though unless you something to cut RPMs off, like a MSD 6al. He doesn't want you to blow your motor.

We played around with a couple different tunes, the one I'm using now was quickest at the track.

He sends an email tune, you load it into the tuner...Nothing goes through snail mail.

Groovy. I am not looking to build a track truck, obviously...it's a CC, but I would like a street truck that can run like my Charger R/T did. 13.27 @ 106.33

[grapejuice1998]

Here's how it went for me:

I bought the SCT PRP when it first became available, but I made sure a local performance shop would tune it first. Mike Wilson of Dallas Mustang was/is a very well respected tuner in the local Mustang scene. He said tuning is tuning and he would be willing to tune my 408, so I bought the PRP package and let him tune it. While it felt faster, it dyno'd about 30hp less and e.t.'d TERRIBLE. It was crazy rich. I took it back and had him tune it 2 more times. Each time it felt right, but it just didn't perform at the track. It was a pig. I had pretty much given up on it, when another local (Evan) bought a data logger and offered to log some runs for me. In the meantime, Hemifever read that I was thinking about just going back to the MP PCM (because it ran better), so he offered to tune it for me. We sent him the data logs and he did tune on it, but it would take a few more sessions to get it right. We never really finished it though. I suppose we could have ended up with the right tune, but I had been beaten down by it so far, so I lost interest.

We never were able to tune the misfires from the cam either, so in the mean time, I have gone back to the stock motor and a MP PCM, for emissions testing reasons.

Oh and another footnote; for some reason, EVERY SCT tune I had would spark knock under a light load as it shifted into o/d. There were various things that were blamed for it, but it never has done that with a MP PCM.

That's just my personal experience though. Don't hate on me because it didn't work out for me.

[Warrior Poet]

Here's how it went for me:

I bought the SCT PRP when it first became available, but I made sure a local performance shop would tune it first. Mike Wilson of Dallas Mustang was/is a very well respected tuner in the local Mustang scene. He said tuning is tuning and he would be willing to tune my 408, so I bought the PRP package and let him tune it. While it felt faster, it dyno'd about 30hp less and e.t.'d TERRIBLE. It was crazy rich. I took it back and had him tune it 2 more times. Each time it felt right, but it just didn't perform at the track. It was a pig. I had pretty much given up on it, when another local (Evan) bought a data logger and offered to log some runs for me. In the meantime, Hemifever read that I was thinking about just going back to the MP PCM (because it ran better), so he offered to tune it for me. We sent him the data logs and he did tune on it, but it would take a few more sessions to get it right. We never really finished it though. I suppose we could have ended up with the right tune, but I had been beaten down by it so far, so I lost interest.

We never were able to tune the misfires from the cam either, so in the mean time, I have gone back to the stock motor and a MP PCM, for emissions testing reasons.

Oh and another footnote; for some reason, EVERY SCT tune I had would spark knock under a light load as it shifted into o/d. There were various things that were blamed for it, but it never has done that with a MP PCM.

That's just my personal experience though. Don't hate on me because it didn't work out for me.
We still love ya:biggthumpup:

[Five9Dak]

The SCT canned spark map is pretty aggressive all over, that might explain your part throttle pinging. Also the cammed larger displacement engine is going to have different needs than most 360s.

[grapejuice1998]

The SCT canned spark map is pretty aggressive all over, that might explain your part throttle pinging. Also the cammed larger displacement engine is going to have different needs than most 360s.

I never ran an SCT canned tune. It was a custom tune, in all cases.

It really didn't ping audibly as you eased through 1-2-3, but o/d always pinged going in and if you tried to ease into it and upshift back to 3, it would really ping. My stock, MP, and Leach flashed PCM's never had that problem, even with a JET II stuck on top of em.

And I'm not saying my setup couldn't be tuned perfectly with the SCT, but if you're not a tuner yourself (and I'm not), you're stuck with whatever you can get locally, or a Hemifever type of e mail tune.

[sunike32]

I never ran an SCT canned tune. It was a custom tune, in all cases.

It really didn't ping audibly as you eased through 1-2-3, but o/d always pinged going in and if you tried to ease into it and upshift back to 3, it would really ping. My stock, MP, and Leach flashed PCM's never had that problem, even with a JET II stuck on top of em.

And I'm not saying my setup couldn't be tuned perfectly with the SCT, but if you're not a tuner yourself (and I'm not), you're stuck with whatever you can get locally, or a Hemifever type of e mail tune.

Did you have that problem with a tune written locally, or one from Sean? First neutral/negative thing I've read about SCT so far, so just curious.

[Adobedude]

Did you have that problem with a tune written locally, or one from Sean? First neutral/negative thing I've read about SCT so far, so just curious.

I read Alan's posts...With a modified engine, like his...It's going to take a few attempts to get it right.
I'm on the 5th tune Hemifever has done for me...Takes time to dial it in...It's not like he's sitting by watching a Dyno run.
You load the tune, hit the track, log a few runs, email the info to Hemifever, he adjusts...Rinse and repeat.

[Sick 660r]

Here's how it went for me:

I bought the SCT PRP when it first became available, but I made sure a local performance shop would tune it first. Mike Wilson of Dallas Mustang was/is a very well respected tuner in the local Mustang scene. He said tuning is tuning and he would be willing to tune my 408, so I bought the PRP package and let him tune it. While it felt faster, it dyno'd about 30hp less and e.t.'d TERRIBLE. It was crazy rich. I took it back and had him tune it 2 more times. Each time it felt right, but it just didn't perform at the track. It was a pig. I had pretty much given up on it, when another local (Evan) bought a data logger and offered to log some runs for me. In the meantime, Hemifever read that I was thinking about just going back to the MP PCM (because it ran better), so he offered to tune it for me. We sent him the data logs and he did tune on it, but it would take a few more sessions to get it right. We never really finished it though. I suppose we could have ended up with the right tune, but I had been beaten down by it so far, so I lost interest.

We never were able to tune the misfires from the cam either, so in the mean time, I have gone back to the stock motor and a MP PCM, for emissions testing reasons.

Oh and another footnote; for some reason, EVERY SCT tune I had would spark knock under a light load as it shifted into o/d. There were various things that were blamed for it, but it never has done that with a MP PCM.

That's just my personal experience though. Don't hate on me because it didn't work out for me.

wow you had some horrible luck.

From what I've experienced sct can go pretty damn far but it still has its little issues. My tune is almost dead on and making 712rwhp at 5800 but its not happy starting (something to do with the 60lb injectors). We even managed to make the stock auto pcm manual friendly. I have delt with sean and was happy from what we did but its nothing compared to being on the dyno. When I worked with sean were were just going by what I saw on my wideband (no dataloging) and he did pretty good.

[sunike32]

I read Alan's posts...With a modified engine, like his...It's going to take a few attempts to get it right.
I'm on the 5th tune Hemifever has done for me...Takes time to dial it in...It's not like he's sitting by watching a Dyno run.
You load the tune, hit the track, log a few runs, email the info to Hemifever, he adjusts...Rinse and repeat.

Yeah, that's why I was sort of surprised by Alan's post. Perhaps he just didn't give enough time for the re-tunes, and since he's got his stock motor and MP PCM back in, the SCT tuning is irrelevant right now.

[meangreen]

The SCT canned spark map is pretty aggressive all over, that might explain your part throttle pinging. Also the cammed larger displacement engine is going to have different needs than most 360s.

I disagree. It depends on the PCM's part number. My stock tune file only had 25* total at ~5000rpm.

After my PCM got fried by an SCT handheld, SCT sent me readable copies of the tunes that were on my handheld at the time. One from a famous SCT tuner.:jester: It had 36* in almost all of the bins. His method for tuning spark, was adding advance until you hear detonation...not the best way as I have found out over the last few years. Needless to say that I am no longer a fan "custom" e-mail tuning. All they really do is tune WOT and guess on everything else ... that is all you can do without butt time or dyno time...

[meangreen]

wow you had some horrible luck.

From what I've experienced sct can go pretty damn far but it still has its little issues. My tune is almost dead on and making 712rwhp at 5800 but its not happy starting (something to do with the 60lb injectors). We even managed to make the stock auto pcm manual friendly. I have delt with sean and was happy from what we did but its nothing compared to being on the dyno. When I worked with sean were were just going by what I saw on my wideband (no dataloging) and he did pretty good.

It's pretty easy to nail WOT and max HP. Anyone can do that in less than an hour. Driveability issues, such as startup are a whole other story and really tough with SCT and forced induction.

[Adobedude]

I disagree. It depends on the PCM's part number. My stock tune file only had 25* total at ~5000rpm.

After my PCM got fried by an SCT handheld, SCT sent me readable copies of the tunes that were on my handheld at the time. One from a famous SCT tuner.:jester: It had 36* in almost all of the bins. His method for tuning spark, was adding advance until you hear detonation...not the best way as I have found out over the last few years. Needless to say that I am no longer a fan "custom" e-mail tuning. All they really do is tune WOT and guess on everything else ... that is all you can do without butt time or dyno time...

Makes sense all they do is tune for WOT, the info I give them is only WOT runs...But that's al I do, so it's all good.

[Sick 660r]

It's pretty easy to nail WOT and max HP. Anyone can do that in less than an hour. Driveability issues, such as startup are a whole other story and really tough with SCT and forced induction.

driveability is fine and extremely smooth but that is just on the dyno. The a/f while crusing through the gears is around 14.5. I plan to datalog regualr driving to fix any small problems that may be there.

[Sick 660r]

dave (adakotartguy) how did chris do on your regular driving?

[ADakotaRTGuy]

dave (adakotartguy) how did chris do on your regular driving?

Good. A little rich here and there but its good.

[meangreen]

driveability is fine and extremely smooth but that is just on the dyno.

I am profoundly confused

[Sick 660r]

I am profoundly confused

what could possibly be so confusing about that?

[turboed r/t]

Hey 660 is that your dakota at P.I.E ?? If so I was there when he was dyno tunning and all I can say is HOLLY SHIT.

[sunike32]

Hey 660 is that your dakota at P.I.E ?? If so I was there when he was dyno tunning and all I can say is HOLLY SHIT.

:jester: :jester: :rockwoot: :rockwoot:

[Sick 660r]

Hey 660 is that your dakota at P.I.E ?? If so I was there when he was dyno tunning and all I can say is HOLLY SHIT.

lol yeah that was mine. Thanks:rockwoot:

[grapejuice1998]

Did you have that problem with a tune written locally, or one from Sean? First neutral/negative thing I've read about SCT so far, so just curious.

Well...since I never ran a canned tune and had trouble with all of the tunes, both Dallas Mustang and Hemifever tuned on it....

Anyway,

As stated before; I believe it could be tuned with SCT, but I think it will have to be "in person" and on a dyno. That person is going to have to know how to tune with SCT. The final piece of the puzzle, they will have to want to tune it right. However long that takes. However many pulls that takes. However much time just cruising on the dyno and letting it go through the gears.
So far, that person doesn't exist in my part of the World.

[RJ_Hythloday]

Well...since I never ran a canned tune and had trouble with all of the tunes, both Dallas Mustang and Hemifever tuned on it....

Anyway,

As stated before; I believe it could be tuned with SCT, but I think it will have to be "in person" and on a dyno. That person is going to have to know how to tune with SCT. The final piece of the puzzle, they will have to want to tune it right. However long that takes. However many pulls that takes. However much time just cruising on the dyno and letting it go through the gears.
So far, that person doesn't exist in my part of the World.
I think you might be that person, PRP. I haven't even started yet, but I'm going to learn PRP.

[grapejuice1998]

I think you might be that person, PRP. I haven't even started yet, but I'm going to learn PRP.

I think tuning is best left to those that already know how. If I thought I could do it myself, it would have been tuned perfectly 2 years ago. :biggthumpup:

[ME111]

I think you might be that person, PRP. I haven't even started yet, but I'm going to learn PRP.

Where in VA exactly are you?

[RJ_Hythloday]

Where in VA exactly are you?

Norfolk, Navy transplant 6 years.

[dakfink]

I think tuning is best left to those that already know how. If I thought I could do it myself, it would have been tuned perfectly 2 years ago. :biggthumpup:

Freekin Gremlins!!! LOL!!

You can learn it!! The guy that I used to work for in his Perofrmance shop learned it from reading threads on the I-net from tuners.

The guy that owns SCT told me himself that Saud was one of the best tuners he knew of.

On that note!! Your issues are exactlly why I tell everyone DYNO time is the best and only real way to tune. (understandable it's not always doable).

Noting that Saud was one of the best; we had 1 of his cousins '99 Cobra in the shop and we played hell gettimg that thing tuned. Took us almost 2 weeks. Spent 3 solid days on it twice in that 2 weeks.

It wasn't anything really over the top. 4.6L DOHC, 9:1 coompression decent cams, Modified Factory Intake and 15 psi from a Vortech (you can get 100 octane at the pump in Kuwait LUCKY US). Had alot of the same issues people have mentioned here.

Would barley Idle, Hard to start, ran fine as long as you were moving, Made good power at WOT 708rwhp. rev to 7000rpms no problem. Ran rich at idle.

After the first 3 day stent on it Saud finally called some shops that he worked with in the US and got some tuning files from similar set-ups. None seemed to help. He finally said screw it and called SCT and talked to the head guy there. They finally traced the majority of the problem to the configuration of the MAF we had set-up and the fact we had spliced in 1ft of wire to move it.

We had moved the MAF from a Blow Through to a Draw through configuration (normal Practice on some MAF Boost Applications) and to do so we had to splice an extension of 1 ft in the cable. 1 ft of 16ga wire doesn't have maybe .001ohms resistance. It was just enough to throw the MAF readings of enough for the ECU to be confused.

After that little fiasco took Saud 3 more days to nail down a drivable tune that made 705rwhp.

As I have seen with a few others that have had tuning issues bad sensors can reak havok. They may not be 100% bad but on their way out.

My advice if you are going to step up to something a lil over the top like from a Stock 360 to a Blown, Eddie Head 408, you might as well buy a new set of sensors all around. MAP, TPS, O2 at a minimum.

I hope that helps!!

I have read many of the issues that people have come across with SCT and yet to see one that couldn't be fixed once the real culprit was found and it never was SCT.

[Intense RT]

I think tuning is best left to those that already know how. If I thought I could do it myself, it would have been tuned perfectly 2 years ago. :biggthumpup:Man, you could do it.

I was overwhelmed a little a first looking at everything, but most of it you won't even need to touch. I'll also never really say I'm a "tuner" as I've read enough to know that "real" tuners are much smarter than 90% of them out there calling themselves one. I will say I can tune my setup though.:biggthumpup:

[grapejuice1998]

Even if I thought I could (and I don't), where would I start? All of the tuners lock their tunes. I'd have to build one from scratch.

[Five9Dak]

I disagree. It depends on the PCM's part number. My stock tune file only had 25* total at ~5000rpm.



I have screen caps from the canned tune on me111's SCT. I was going to use that spark map as the basis for the NA portion of my tune. I still would really like to see somebody datalog a mopar PCM. I could write a program to populate a spark table from the log. The mopar engineers really nailed it IMO, huge torque gains and never a hint of pinging ever. I'd ideally just like to use that for my NA portion. (and I will before I decode the crank and cam using the MS as a boost retard box)

The stock map I have from a 99 has about 25* up top like you said. The SCT screen cap has a lot more than that.

[dakfink]

Even if I thought I could (and I don't), where would I start? All of the tuners lock their tunes. I'd have to build one from scratch.

Barnes and Noble!! That is where I got 2-3 of my Tuning books from.

Even got 1 that was written by the guy that runs EFI-101 school.

www.efi101.com (for beginers all the way to pros)

If you can do basic math you can tune.

It's not that hard. The hard part is tuning for drivability which really takes TIME & PATIENCE more than anything. Most people don't have the patience and aren't willing to spend the time on a dyno or testing to nail it down.

The science math and physics behind it all are really simple. Air, Fuel, Spark and Timing.

get a hold of some of theat EFI-101 guys stuff and read it. He was Navy so he writes all his stuff where the average person can understand it.

If I remember tonight I'll see if I can find a link to the books I have.

Far as starting off with a Base map to work from a lot of the programs will write that for you by clicking a few selection boxes in the start-up menu. If they don't then you can easily learn the math to do it yourself.

Most people are scared of Blowing Up and engine from the beginning!! You got more chances of just not being able to start it than blowing it up.

Best I can say is get this EFI101 guys books and any others you can find and read. There is a lot that can be absorbed and over done but the Principals are simple.

If you can work on your truck you can tune it.

You don't really have to have a Dyno either (even though it is the best way). If you'll watch EFI racers they are quite often tuning at the track. They usually set their base programs before the seasons starts then they tune according to the Track and Weather for the day during the season.

[dakfink]

I have screen caps from the canned tune on me111's SCT. I was going to use that spark map as the basis for the NA portion of my tune. I still would really like to see somebody datalog a mopar PCM. I could write a program to populate a spark table from the log. The mopar engineers really nailed it IMO, huge torque gains and never a hint of pinging ever. I'd ideally just like to use that for my NA portion. (and I will before I decode the crank and cam using the MS as a boost retard box)

The stock map I have from a 99 has about 25* up top like you said. The SCT screen cap has a lot more than that.

Call Hemifever and see if he has a copy of the Fuel and Spark maps he could send you. If SCT works like it did with Fords you download wahtever is on the PCM as soon as you plug into it, then it uploads your tune. He should be able to copy and paste those tables to an Excel spreadsheet for you.

[meangreen]

I have screen caps from the canned tune on me111's SCT. I was going to use that spark map as the basis for the NA portion of my tune. I still would really like to see somebody datalog a mopar PCM. I could write a program to populate a spark table from the log. The mopar engineers really nailed it IMO, huge torque gains and never a hint of pinging ever. I'd ideally just like to use that for my NA portion. (and I will before I decode the crank and cam using the MS as a boost retard box)

The stock map I have from a 99 has about 25* up top like you said. The SCT screen cap has a lot more than that.

Most of the files that I looked at had minimal spark up top. You might have been looking at a MOPAR PCM table. Remeber also that the spark table is corrected with closed loop spark calculations, so the actual spark can be higher or lower than the table based on ECT, IAT, and etc.. My logs look very similiar to the table at operating temp though. My stock 318 looks like this:

http://i253.photobucket.com/albums/hh64/meangreen318/Screen01.jpg

[Five9Dak]

That looks similar to the stock R/T map I have stowed away somewhere. I understand it is a base table and is modified from, and I have seen the tables that can modify it. It's re-assuring to hear that your logs are pretty close to the table at operating temp, that's what I would hope is the case.

The screen caps I got from me111 he stated were the canned performance tune that came with the handheld.

Can you link up SCT to a mopar PCM to read out the tables? I thought the PN would cause a mismatch of somesort.

[meangreen]

That table can be modified directly.

Yes, there is a "stock" file for a MP PCM in the SCT software.

[Sixfootface]

Love my SCT!

[Five9Dak]

That table can be modified directly.

Yes, there is a "stock" file for a MP PCM in the SCT software.

No shit, I wonder if that's what I have.

http://i14.photobucket.com/albums/a319/black99rt/SCTspark.png

Do you have the mopar pcm file?

I was thinking I could use my mt2500 to do some datalogging to get a rough idea what the WOT curve looks like.

[meangreen]

No shit, I wonder if that's what I have.

http://i14.photobucket.com/albums/a319/black99rt/SCTspark.png

Do you have the mopar pcm file?

I was thinking I could use my mt2500 to do some datalogging to get a rough idea what the WOT curve looks like.

Everyone with the PRP had access to the file. My software isn't with me right now though. Boomin5point9 on dak-dur posted up the part# a while back. If you can find the part number, I will pull the map for you when I get my software installed again.

[RJ_Hythloday]

Everyone with the PRP had access to the file. My software isn't with me right now though. Boomin5point9 on dak-dur posted up the part# a while back. If you can find the part number, I will pull the map for you when I get my software installed again.
I haven't installed mine yet, is there a limit to how many times you can install, or one pc at a time type thing?

[Intense RT]

I thought the MP pcm gave 31* total advance?

[Five9Dak]

p5007107 is the computer I will run as my base spark map, I'd love to know exactly what it is so I can make better decisions on how much to pull in boost.

Curious to see the non egr map, and any of the multiplier maps (like coolant and air temp) if they deviate from stock or other tunes.

For example I noticed that IAT spark retard curves end at a certain temp because it assumes you are NA, I would perhaps want to use MSII to pick up the slack on the end of that curve if that situation were to be encountered. Etc....

The PN above is the perf controller for 99 5.9 2wd federal A/T.
99 cali is p5007108
98 fed is p4876896
98 cali is p5007123

Those are the only two years I have on this sheet that came in the box with mine way back when.

[G-Man]

I have logged a little from my 99 Mopar pcm, the WOT timing was 23.5° @ 1800rpm up to 30° @ 4200 and max of 30.5° above 4300rpm, max rpm I had logged was 5162@30.5°
also logged Mopar Pcm with the Superchips Flash and timing was way up, 36.0° max. Let me know if you want more of this datalog.
Gwyn

[meangreen]

p5007107 is the computer I will run as my base spark map, I'd love to know exactly what it is so I can make better decisions on how much to pull in boost.

Curious to see the non egr map, and any of the multiplier maps (like coolant and air temp) if they deviate from stock or other tunes.

For example I noticed that IAT spark retard curves end at a certain temp because it assumes you are NA, I would perhaps want to use MSII to pick up the slack on the end of that curve if that situation were to be encountered. Etc....

The PN above is the perf controller for 99 5.9 2wd federal A/T.
99 cali is p5007108
98 fed is p4876896
98 cali is p5007123

Those are the only two years I have on this sheet that came in the box with mine way back when.

If noone else pulls the file, i will in a few days when I get back to my PC.