LS1IROC

Man, what a way to ruin someones day. I'm not one that puts a lot of stock in dyno #'s, but I don't think this is even in the ballpark! I have a 90 IROC with a 98 LS1/4l60e. It has some headwork, TR224/112,Pulley,LS6 intake,AFPR,Ed Wright tuning,Hooker shorties(only thing that would fit),with a true 2.5" dual exhaust, 4:10 gears and a vig3200 convertor. Now, This dyno guy, who just started this business doesn't have a whole lot of experience and I hope there is a proper technique to test an auto/convertor car and he just doesn't know it. Anyway, the car made 326hp&327lbftTQ uncorrected on the first run and only 248 hp on the 2nd and 3rd runs acoording to the printout. Impossible I say! By the way, The car has run 12.00 at 115.46 on a poor 1.8 60 on Nittos. No skinnies, no cutout. Please help me feel better or accept the truth. Any opinions or insight would be greatly appreciated. Sean

SAINT WS6

can you post the graph?

LS1IROC

I don't have a scanner, so I can't post the graph.If I remember right, the horsepower and torque should be ~the same at 5250 rpm, and they are not.(5550rpm) Peak power occured at 6500, torque started at 327. It appears the numbers started at about 4500rpm, so there may have been more a little lower. I guess I'll just throw some ET streets on her and run 11.70's with 326rwhp and 3500lb raceweight.

DriveATransAm

hey sean, i have nearly identical mods. i dynoed 385/411 (unlocked i think). fwiw i dynoed 305 at flp when i was boltons and ran 11.9 the next day. if you are running the ETs, i wouldnt worry much.

ONGRNGO

I have an 88' Iroc-Z, but it has the L98 still, but I have a set of hooker SuperComp. Long Tubes in it with a custom made X-Pipe. I love the headers.