cochran191

I'm looking for a bone stock or lid/catback dyno graph of a 1999 Z28 with a M6 and 3.42 gears. I know that it is kind of specific but I am looking for hp/tq specs at certain rpms. If anyone could help me out that would be great. Thank you in advance.

zigroid

iTrader: (22)

mine is a '99 formula but same car, M6 and stock 3.42s.

cochran191

What I using the graph for it to know when to shift. Knowing when peak HP is made will allow me to know when to shift.

wfritts911

iTrader: (2)

98 formula here, M6, 3.42s, and a flowmaster muffler, peaked at 308hp@5200.

-Will

cochran191

Thanks guys, 5200-5300 seems to be the sweet spot for our cars, that will allow me to make the most of my runs without a shift light.

zigroid

iTrader: (22)

here is another interesting dyno.

this is my '99 formula overlayed with a buddy's 2003 base vette. the vette had about 30k miles at the time and my car had 130k or so. these are on the same dyno on the same day within an hour or two of eachother.

mine is red his is green



I dont know the reasoning for his top end power holding on better but my low/mid range torque being better. does the LS6 intake and slightly different camshaft the later LS1s received account for this? or is it the better flowing exhaust manifolds on the vette with true duals? or is it my 130k mile valvesprings are tired and cant hold the power as long any more?