[cadillac531]

Originally Posted by Paul Workman

Around 6400 ya think? Hmmmm....

Pete and I were discussing the topic of where to shift for performance (on a stock ZR-1) with Jim (Jingles) Inglals (sp?). (Jim was the Corvette engineer that established - among other things - the drag strip numbers for the then new ZR-1) As I recall he recommended POWER shifting the Z at around 6300-6400 rpm (no throttle let-up between gears).

I think Pete and I agreed that neither of us is going to do any POWER SHIFTING as long as its on our dime if something breaks! But, to your comment regarding the UPSHIFT light coming on at 6400 for performance(?)...makes me wonder if it isn't more than just a "koinkeedink"

But, here's the thing: If Jim power shifts at around 6400, according to the tach, the actual rpm might well be at least a few hundred rpm higher than 6400, especially in the lower gears.

Just muddying the waters a bit...

Yeah, you may be right on that. I don't watch the tach very closely anymore except for the hole shot, where I bring it to 4000 off the line.

I just grab the next gear when the shift light pops, and in my peripheral, it looks like the needle is around that 6400 mark. The car is dead on consistent shifting with the light, though.

To the power shifting comment:

I power shifted it once on the street, and without a prepped surface, it blows the tires off on the 1-2 shift. That shifter has such a long throw though, that you really have to train that clutch leg to stay in long enough to complete the shift. I haven't, nor am I interested, in power shifting that 3-4 shift.

No worries on the muddy water...it makes things interesting.