The results were thouroughly dissapointing. I really need to reprogram my computer badly. I've never seen a torque curve shaped like a triangle before, have you?



Obviously either the car isn't getting enough fuel up top, or the timing isn't advanced far enough. I'm going to have to make a few runs with my scanner hooked up to get an idea of what's going on, and then start in on programming myself a new chip.

I hope it's just the computer that is really killing the top end on the motor. I knew the intake would choke it some - but I don't think it'd be that dramatic.

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Black 88 GTA L98
261 RWHP, 345 RWTQ
ZZ4 bottom end, Edelbrock 6085 heads, LT4 HOT cam, GMPP 1.6 RR's, ported stock TPI, SLP 1 3/4" headers, no cat, Dynomax cat-back, Stock PROM
E.T.F.A Member #11

 

Wow! You need a new chip or something.
My stock 92Z28 305TPI convt but down
220.5hp @4500 to the rear wheels
with 313.5ft/lb torque @ 2500.
That was with hollow cat, ported plenum intake and runners.
You have WAY more potential then that.
Time to play with timing, fuel pressure etc.
My dyno sheet spiked at like 2800, dipped at 3000 and spiked back at 3100. Something with the dyno computer.


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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

Oh.. my.. god. You still have the stock chip? Ditch that thing! My car wouldn't even run with it. Your car is almost exactly like mine except that I have a ported Super Ram manifold with everything else stock. I haven't dyno'd it yet.. I'm still waiting to get the rest of the Super Ram. Do you have an AFPR? If not get one.. I turned my fuel pressure up and it made an enormous difference in top end power.

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4 bolt 350, 10.4:1 Compression, Edelbrock Aluminum Heads 6085, LT4 Hot Cam /w 1.6 full rollers (Crane), Scat Crank, SLP 1 3/4" Headers, SLP Cold Air Intake, Crane AFPR, 48mm TB, ported plenum, stock runners, Accel Super Ram intake manifold, 95Z #24 injectors, stock fuel rails, T5 Tranny, 3.45s, 9 bolt rear, 4 wheel discs, BFG Comp T/As rear, SZ50s in front, Alston SFCs, ES Trans Mount, ES front A-arm bushings, ES front sway bar end links

 

Rob, yeah I know there's way more potential there, I was really disappointed with the results today.

Mike, our setups are almost identical aren't they? Yeah, I have an AFPR, but I don't have a pressure gauge, so I haven't messed with it much yet. And I also just got TunerCat so I can start burning my own chips here shortly. What chip are you running in your car? Is it aftermarket, or is it a custom burn? Either way if you have the .bin file for it could you e-mail it to me? Thanks...

[This message has been edited by Scott 88 GTA (edited January 27, 2001).]