different cam or speed density?
Thread Starter
Joined: May 2010
Posts: 1,646
Likes: 1
From: Southside,Indiana
different cam or speed density? I have a 2001 trans am with a h/c/i and stalled auto
specs:
Heads- 5.3 706 casting ported and milled to 62.5 cc
Head gasket: cometic .040 mls
Cam: Tick performance POLLUTER
Intake: Fast 90 w/ Nick Williams 90mm tb
Maf: 85mm delphi w/ ftp 98mm lid
Headers: pacesetter 1 3/4 longtubes w/full 3 inch exhaust
Compression:10.92:1
Stall: ptc 4000
My tuner is having issues where the cam is causing reversion at idle and braking. During normal driving it runs fine but wants to die at idle or stopping. He's thinking to either do speed density or a smaller cam. I'm just trying to weigh my options. I want my car to be able to drive all year round and have reasonable street manners.
thanks for the input
specs:
Heads- 5.3 706 casting ported and milled to 62.5 cc
Head gasket: cometic .040 mls
Cam: Tick performance POLLUTER
Intake: Fast 90 w/ Nick Williams 90mm tb
Maf: 85mm delphi w/ ftp 98mm lid
Headers: pacesetter 1 3/4 longtubes w/full 3 inch exhaust
Compression:10.92:1
Stall: ptc 4000
My tuner is having issues where the cam is causing reversion at idle and braking. During normal driving it runs fine but wants to die at idle or stopping. He's thinking to either do speed density or a smaller cam. I'm just trying to weigh my options. I want my car to be able to drive all year round and have reasonable street manners.
thanks for the input
Last edited by babbage1109; Nov 24, 2013 at 06:43 PM.
TECH Regular
Joined: Sep 2007
Posts: 443
Likes: 3
From: Kansas City, MO
That's a pretty good size cam. It definitely won't have the best street manners but a good tuner should be able to get it to idle without dying. I don't think a speed density tune is the answer. Running airflow and timing are.
An SD tune is not really going to prevent the reversion phenomenon...that's hardwired in how the cam works and you can't change that unless you change the cam itself.
You can only tune a big cam so much, at a point you're just going to have to deal with it given the size of that. Although I do think a decent tuner should be able to make that cam not stall out the engine each time.
You can only tune a big cam so much, at a point you're just going to have to deal with it given the size of that. Although I do think a decent tuner should be able to make that cam not stall out the engine each time.
Thread Starter
Joined: May 2010
Posts: 1,646
Likes: 1
From: Southside,Indiana
I feel like it should be fine considering how long the cam has been around and it's popularity but Idk. I guess I will just wait and see what comes of it. There just aren't many tuners around here lol
Just have your tuner turn the maf off and dial in up to 1600 rpm cells in the VE table to see if SD will even fix it. You should be able to test that quickly to determine if it will work or not.
If it does, then put in a tube and go SD.
If it does, then put in a tube and go SD.
Reversion is not causing those issues.
Running air flow, IAC position and spark timing are. Which do need to be modified due to added overlap and reversion, but those parameters aren't correct if your car is stalling.
Running air flow, IAC position and spark timing are. Which do need to be modified due to added overlap and reversion, but those parameters aren't correct if your car is stalling.
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Thread Starter
Joined: May 2010
Posts: 1,646
Likes: 1
From: Southside,Indiana
Ohh okay. Yeah I have no idea about the whole tuning aspect. I really like the numbers and performance ive seen this cam put down in other cars. I think I may just have someone with more experience look at it come spring. I'm just going by what my tuner was telling me. Lol
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Verdad Gallardo If you can't find someone to tune it properly, I will offer you a discount on a trade for a smaller cam.
I'll give you a credit for your current Polluter camshaft and you can use that credit towards a newer smaller camshaft that will make your tuners job much easier.
Just let me know.
I'll give you a credit for your current Polluter camshaft and you can use that credit towards a newer smaller camshaft that will make your tuners job much easier.
Just let me know.
If you can't find someone to tune it properly, I will offer you a discount on a trade for a smaller cam.
I'll give you a credit for your current Polluter camshaft and you can use that credit towards a newer smaller camshaft that will make your tuners job much easier.
Just let me know.
I'll give you a credit for your current Polluter camshaft and you can use that credit towards a newer smaller camshaft that will make your tuners job much easier.
Just let me know.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
