Need some input/advice???

**stray1011** · 09-28-2006, 07:26 AM

I just got the car back after getting the following installed: AFR 205's 66cc, GMMG Exhaust, Dynatech LT's with high flow cats and y-pipe, custom cam 228/228 112 lsa .570 lift, timing chain, SLP CAI kit, TR 55's, chromoly pushrods, Spohn SFC, ported TB, all new gaskets and a tune etc...I thought everything was fine until I got the car dynoed. Here are the numbers on a dynojet....335.4 HP / 362.5lbs. This seems pretty low to me...Anyone have any thoughts on why the numbers are so low?? The car is not a daily driver anymore and hasn't been for the last 2 years...has 11k on it...2001 Z28 A4, 2.73. I didn't get the car dynoed before the mods because I was trying to save some $$. Any input or thoughts would be appreciated. Do those numbers sound low to anyone else??

**dougcw** · 09-28-2006, 08:57 AM

Do you have the stock torque converter on the car? If you do you probably need to get at the very least a 3000-3200 RPM stall converter. The 2.73 gear is a small gear. I had that in my 95 Z28 LT4. I went with 3.73 and a Vigilante 2800 stall torque converter, the difference was amazing. I bet that your torque curve is bigger than the horsepower curve on your dyno results too. A couple of other things to consider is if you were on a Mustang dyno and if the dyno was loaded. Those two factors will give you lower numbers.

**stray1011** · 09-28-2006, 01:34 PM

stock converter...stock gear...most of the car is stock except for what was just modded.

**vettenuts** · 09-28-2006, 05:08 PM

Are you sure they pulled it in third and not 2nd?

**nhraformula** · 09-28-2006, 06:21 PM

Originally Posted by stray1011

I just got the car back after getting the following installed: AFR 205's 66cc, GMMG Exhaust, Dynatech LT's with high flow cats and y-pipe, custom cam 228/228 112 lsa .570 lift, timing chain, SLP CAI kit, TR 55's, chromoly pushrods, Spohn SFC, ported TB, all new gaskets and a tune etc...I thought everything was fine until I got the car dynoed. Here are the numbers on a dynojet....335.4 HP / 362.5lbs. This seems pretty low to me...Anyone have any thoughts on why the numbers are so low?? The car is not a daily driver anymore and hasn't been for the last 2 years...has 11k on it...2001 Z28 A4, 2.73. I didn't get the car dynoed before the mods because I was trying to save some $$. Any input or thoughts would be appreciated. Do those numbers sound low to anyone else??

were from the same city, who dynoed it?

**Silver Streak** · 09-28-2006, 06:36 PM

Damn... my stock car has 306/323... I would think exhaust would get me close to those numbers... not counting all the rest of what you've done....

**stray1011** · 09-29-2006, 05:26 AM

Originally Posted by KITTvsKARR

Damn... my stock car has 306/323... I would think exhaust would get me close to those numbers... not counting all the rest of what you've done....

i know

**Hot Black Trans-Am** · 09-29-2006, 05:29 AM

Did they hook up all the plug wires??

**stray1011** · 09-29-2006, 06:29 AM

we made three different pulls and i'm sure the guys set it up right...all the same results.

Ratdaddy07 · 09-29-2006, 08:15 AM

Do you trust them? Did they try to sale you something to "fix" it. Definitely low. Fuel problem maybe, low miles but if it sat you may want to check everything in line from tank to motor as far as fuel goes.

**stray1011** · 09-29-2006, 09:43 AM

Originally Posted by Brian Hensgens

Do you trust them? Did they try to sale you something to "fix" it. Definitely low. Fuel problem maybe, low miles but if it sat you may want to check everything in line from tank to motor as far as fuel goes.

No they didn't try to sell me anything, they seemed just as confused as I was and didn't have an answer for me.