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View Full Version : to much cam no brakes!

krs1r/t
04-09-2010, 12:05 AM
anyone have this problem? i need a vaccume canister. anyone have one maybe a few pics?
ME111
04-09-2010, 01:13 AM
anyone have this problem? i need a vaccume canister. anyone have one maybe a few pics?

I'm sure you'll find a canister but would advancing your cam a bit be a possibility for your setup at this point? ie..sufficient piston to valve clearance room, enough power curve room to back it off a bit and not affect top-end performance too much. I'm not done yet but have recently been doing some late-night research on the cause and affect of adjusting cam timing. A lot of good reads out there.
99408kotar/t
04-09-2010, 01:13 AM
anyone have this problem? i need a vaccume canister. anyone have one maybe a few pics?

no canister. i bought an ssbc electric vacuum booster. seems to do the trick. sounds like i have air ride when it kicks on haha. no pics of it yet. ill try n get some
Sick 660r
04-09-2010, 01:31 AM
canister only gives you a little more time. Vac pump is the fix. I had a canister and ended up switching to a pump.
ADakotaRTGuy
04-09-2010, 01:50 AM
What size cam are you running?
krs1r/t
04-09-2010, 10:10 AM
250 dur 644 lift it only pull 2or 3 iches of vac at idle
mtlcafan79
04-09-2010, 10:55 AM
Canister won't help that.
98Dak408
04-09-2010, 12:45 PM
250 dur 644 lift it only pull 2or 3 iches of vac at idle


Canister won't help that.
Yeah, a canister can only store what an engine produces.

I wonder if you have some other problem causing low vacuum. 2 -3 in-hg seems pretty low, doesn't it?
mtlcafan79
04-09-2010, 01:10 PM
I would think he would easily have three times that. Low idle speed, improper cam timing, rocker adjustment?
dakfink
04-09-2010, 01:28 PM
he didn't mention his LSA.

with that Duration and an LSA of 108 or below your hurting for vacuum.
krs1r/t
04-09-2010, 04:22 PM
my cam lsa is 108 idle speed is fine cam timing is fine, and my rockers are not ajustable. having no vac is what it is. what i want to know is what to do about it.
mtlcafan79
04-09-2010, 04:44 PM
That's a drag race cam pretty much. Need to look into Hydraboost or some other sort of vacuum system.
ADakotaRTGuy
04-09-2010, 04:50 PM
That is a HUGE cam.
mtlcafan79
04-09-2010, 05:13 PM
Not really, just a ton of overlap. Bleeds cylinder pressure, less vac, etc.
gokota
04-09-2010, 07:04 PM
I used a vacuum reservoir/canister in my car, it works great, but my car is allot lighter I don't know if that will make a big difference

Jim
Rtspeeddemon
04-09-2010, 07:32 PM
Needs to run an electric brake booster like some caddys run.
gokota
04-09-2010, 08:36 PM
This is similar to the one I used

http://www.summitracing.com/parts/CCA-5200/
mtlcafan79
04-09-2010, 09:40 PM
A can won't give you any more vacuum. Just "stores" more vacuum.
99408kotar/t
04-09-2010, 10:54 PM
http://www.summitracing.com/parts/SSB-28146/. this is what i have. works great and will solve your problem
Intense RT
04-09-2010, 11:42 PM
4k stall minimum
Sick 660r
04-10-2010, 12:01 AM
this is the one I went with
http://www.summitracing.com/parts/SUM-760150/
bruizer28
04-10-2010, 05:56 AM
i didn't want to hear a pump running so i went with a hydroboost since i will be running 41" tires with hydro-assist steering.
Sick 660r
04-10-2010, 09:37 AM
i didn't want to hear a pump running so i went with a hydroboost since i will be running 41" tires with hydro-assist steering.

I dont hear my pump run lol. The fuel pump is even louder then it.