2002 ZL1

[Chevy454]

82z96ss:

At what RPM did the car hit peak HP at? Also, what did it look like right above/below the peak? The reason I ask is, that I was shifting our car at it's HP peak, until Pete suggested I spin it a little tighter. I did, and it went quicker. So, I shift about 500 rpm PAST the peak. BUT, my peak was fairly "flat" for a peak, as I was within 10hp of my peak (425hp) for several hundred rpm's. I peaked at 5800, but shift at 6300 when it nosedives, and it goes quicker. Might be something to look into...

I think the codes are definitely something I'd look into if I were you. Before you posted your dyno #s, I was gonna guess the RWHP of the Z-28 on spray you ran at around 425rwhp, assuming he has the usual free mods and probably a couple of other add ons. Then, your dyno confirmed that I wasn't too far off, since you 2 ran so close. I'm not an expert on the '02 ZL-1s, but I'm gonna guess your Phase III should be in the 500rwhp neighborhood...? Charley?