Speed at WOT ?

[XfireZ51]

Originally Posted by LancePearson

Watching the videos it seems to me that the speed each gear runs up to 7-8000 rpms is faster than a 3:45 rear end. I relate since I also have a 2008 TBSS with LS2 that came from GM Performance group with a 4:10 rear end so I have a direct comparison of two over 400 hp engines and a 3:45 and 4:10 rear end. I'd guess you have a 4:10 rear end in the Z from watching the videos of the one that gets to 100 mph in third gear. I get to 125 mph in third gear in my stock 1991 Z with 3:45 rear end. Speed to get through each gear seems more like a 4:10. Check it.

w my 3.45s and 17" wheels, I would got through the traps in 3rd gear at ~7000rpm with a trap speed of 118 or so.