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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Car refuses to breathe uptop, help.

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Old Aug 25, 2007 | 07:32 AM
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Default Car refuses to breathe uptop, help.
I have a 96 trans am a4. It has a decent cam, mild ported heads, really good valvetrain set up, LTs, and a dumped x pipe, cold air intake. My car will not pull real hard above 75-80 ish. I mean it will pull, but when I run cars I should kill its much closer than it should been. Can anyone help me out with this.
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Old Aug 25, 2007 | 01:20 PM
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Old Aug 25, 2007 | 01:25 PM
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what gears? what stall? What size cam? What size Throttle Body?
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Old Aug 25, 2007 | 02:38 PM
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What's a really good valvetrain?
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Old Aug 25, 2007 | 02:39 PM
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have you tuned it?
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Old Aug 25, 2007 | 04:32 PM
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I have a madz28 tune. I have stock stall and gears. My cam is somewhere around 228/232 and my heads are mildly ported with big valves. My valvetrain set up consist of crane double springs, super nice rockers, hardened pushords, 3/8 studs, etc. I also have a moroso cai and a vortec intake elbow. Stock TB and intake as well.
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Old Aug 25, 2007 | 04:35 PM
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intake/throttle body might be bottlenecking a bit...but not enough to kill the power. stock stall/gears might also let it drop below the cam powerband...and kill its charge through 3rd gear.
what about fuel injectors?
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Old Aug 25, 2007 | 04:48 PM
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stock stall with a cam somewhere around 228/232 is a small problem right there!
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Old Aug 25, 2007 | 05:40 PM
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LOL, what are super nice rockers? Self align or non?
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Old Aug 25, 2007 | 05:41 PM
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What RPM are you shifting at? At 75-80ish, what are your RPMs, which gear?
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Old Aug 25, 2007 | 05:42 PM
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QFT, their pretty ones.
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Old Aug 25, 2007 | 10:04 PM
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Crane engergizer rocker arms. I have a A4 but at 75-80mph im around 2750 maybe 3k.
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Old Aug 26, 2007 | 12:22 AM
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You need a bigger stall with that cam.
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Old Aug 26, 2007 | 07:18 AM
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Originally Posted by goodrich969
Crane engergizer rocker arms. I have a A4 but at 75-80mph im around 2750 maybe 3k.
It's not gonna pull much in OD at that engine speed.
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Old Aug 26, 2007 | 10:06 AM
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You need a bigger stall and gears!
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Old Aug 26, 2007 | 10:56 AM
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What gears do you have now? 373s and a 3500 VIG Cures alot of problems A4s have.
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Old Aug 26, 2007 | 11:04 AM
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Stock gears. Im looking at a stall right now and gears after. Would anyone think it could be fuel runnin out? I have stock injectors.

Thanks!
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Old Aug 26, 2007 | 11:14 AM
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could be i was running at 96% duty cycle on a hotcam car
sounds like it's about time u get a dataloger so you know a lil more about whats going on under the hood
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