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View Full Version : Saga cont. Tractionless truck



Aves
11-02-2008, 10:55 PM
Well just got back from the track. Still doing 2.324 to 2.229. 60ft times. Did get a bit better time with new tune. Best run:

2.2702 60'
6.008 330'
8.9384 1/8
83.64 mph
11.473 1000'
96.71 mph
13.6006 1/4
106.61 mph

Front Qa1 set at 1 for all runs. will list other stuff as I remember per 60'

2.2296-60ft: Stalling to 1700rpm slicks at 15psi caltracs no load
2.2702 : leave off idle slicks 14psi caltracs no load
2.2938 : changed tune other was lean stall to 1800 slicks 14 caltracs no load
2.3244 : idle launch slicks 14psi caltracs half bar load 120lbs added at tailgate
2.2872 :1800 rpm 14psi half turn on caltracs 120 pounds at tailgate
2.3133 : 1800 rpm 12 psi ful turn on caltracs 120lbs
2.2497: 1850 rpm 17psi caltracs no touching no weight rear QA1 set at 4

Rear qa1 set at 6 except on last run. Soften slicks up with wd-40 last couple days. They were softer but by times didnt help. First 4 runs done with just hops to clean slicks as they felt pretty soft.

Here is one of the last starts wish I could tell you which but not sure. Sorry about quality of it was done with a digital camera.
http://my.photodump.com/Yort/755e89c7c3f955c9-T.jpg (http://www.photodump.com/Yort/755e89c7c3f955c9.flv.html)

Any tips or hints would be great at this point.

Troy

uwntsumrtII
11-03-2008, 12:41 AM
hard to tell, but it doesn't look like a traction problem to me. more like no power off the line.

uwntsumrtII
11-03-2008, 12:43 AM
you need gears and/or a bigger TC. i had that same MS 2800 in mine a while back and it was still a pig off the line.

bad360rt
11-03-2008, 12:47 AM
So no burnout? I'd think old slicks would need a pretty serious burnout to warm 'em up. New slicks would probably help a lot.

mtlcafan79
11-03-2008, 02:35 AM
I vote for the slicks being dead as well at this point. The WD-40 thing never did anything for me.

Mudman (adobedude) had a MS stall and it never really worked for him either. Ask him about his new stall.

SinCity R/T
11-03-2008, 03:01 AM
I think you just need some new/better tires.

With M&H 325/45-17's the best I could cut at the track was a 2.4 60'. They're a great tire, but at this point I'm simply overwhelming them off the line. I bumped to a 28x13.5 E/T Street and now I'm cutting 1.6-1.7's.

Your drivetrain combo should be fine - I'm running a 55x52 F&B, M1-4bbl, Spintech headers/exhaust, Mopar 2.02's, somewhat mild cam, but 4.56's and 150 shot instead of S/C.

uwntsumrtII
11-03-2008, 02:27 PM
did anyone else watch his lil video? you can zoom in a bit. since he's got the white letters facing out it's real easy to see if there is wheel spin. from that vid i don't see ant wheel spin.

grapejuice1998
11-03-2008, 02:30 PM
did anyone else watch his lil video? you can zoom in a bit. since he's got the white letters facing out it's real easy to see if there is wheel spin. from that vid i don't see ant wheel spin.

My first impression was the same Rob. It looked like it just didn't have any low end power, like you said.
I was wondering, since it has 2.02's, shouldn't it have a larger cam? That might be hurting him some right there.

Five9Dak
11-03-2008, 07:31 PM
The title of the thread is traction less truck. But I agree that it doesn't seem to be spinning, and the OP Didn't mention what any of his changes had on TRACTION only 60 foot times.

Should be able to pussyfoot it to better 60s than that, even on street tires, provided there was enough torque at converter stall speed.

uwntsumrtII
11-04-2008, 03:49 AM
My first impression was the same Rob. It looked like it just didn't have any low end power, like you said.
I was wondering, since it has 2.02's, shouldn't it have a larger cam? That might be hurting him some right there.

big valves, 4bbl m1 and a puenie cam isn't gonna do much off the line.

Aves
11-04-2008, 05:48 PM
Was talking to the friend that went with. He said it would get a slight spin then slightly bog a bit. Yea I probably sho8uld have gone with bigger cam but at the time when I started putting this set-up together there was no SCT tuning out there and was wanting to stay a bit conservative since shortblock has 95k on it. I did notice from my logs that tip in is a bit rich. Need to talk to Sean see if I can get him to lean that out a little and see if that will help out a bit.
One question for ya how much lower is brake stall usually the true stall on a torque converter? The martin saine I have I bought used(can't remember from who now) but seems to push through at around 1800 rpm.

Troy

mtlcafan79
11-04-2008, 06:11 PM
A bigger cam would have made the bottom end even softer. MY 3200 viper stalls up to 4k if I mash it from idle. On the brakes it stalls up to 3k-ish and kinda turns the corner on the logs. It's a much sharper spike from idle. You need more convertor and less cam if anything to try and shock the tires harder on launch.

slvr03dakrt
11-06-2008, 02:18 AM
A little nitrous out of the hole will help with the bog for sure. I'd say a 50shot out of the hole to get her wrapped up and you would be good. :biggthumpup:

Aves
11-06-2008, 07:37 AM
LOl going to try to get stock bottom end to last one more year so juice is out. Might call it for the year and strip some weight off her over the winter and maybe look for a new stall convertor in the spring.


Troy

grapejuice1998
11-06-2008, 03:45 PM
A little nitrous out of the hole will help with the bog for sure. I'd say a 50shot out of the hole to get her wrapped up and you would be good. :biggthumpup:

I know a guy with a vortech and just a 35 shot. He blew the head gasket so bad, it scorched a trench in the deck of the block. He ditched the nitrous, lol.

WhiteRT
11-06-2008, 05:24 PM
I know a guy with a vortech and just a 35 shot. He blew the head gasket so bad, it scorched a trench in the deck of the block. He ditched the nitrous, lol.

I agree with you Alan....

I think with the 4bbl M1, 2.02 R/T heads, 58MM TB that the vortech just cant get with the program out of the hole.....I think the solution is in the stall converter (I am thinking a 32-3500 stall would benefit him) or different size slicks to play with the rearend ratio a little bit....

Todd

Aves
11-06-2008, 06:12 PM
Yea was thinking of new stall sometime this winter and take some weight off her same time. Might try to get out one more time this year will see how the weather plays out.:drive:

Troy

Five9Dak
11-07-2008, 12:39 AM
My converter brake stalls about 800 rpm lower than it flashes too on a stomp as well, that's normal.

I can get 22 to 2400 on the line and 3k to 3200 when it flashes, depending on trans fluid temp. I think our crappy rear brakes don't help the situation either.