on your stock itr, when do you guys shift at? the power stops at 8k but do you guys actually shift at 8400?

 

when my itR was stock, i would usually shift at anywhere between 8 to 9k. Depending on what the driving situation was. ie.. turning, when i wanted my up shift gearing rev to be higher or not.

 

It depends on conditions.

 

The only reason to go past your power peak is to avoid shifting. Sometimes you can find yourself in a particular turn where it is quicker to rev beyond your power curve, rather than upshift & then immediatly hit the brakes. It just gives you more flexibility...

 

Stock ITR here - shifting just short of rev limiter (8500 rpm) as long as I have traction... This yields maximum acceleration. A modified power curve that drops more significantly at the high end may necessitate shifting at a lower speed for max accel.

 

Yes, it depends.

For maximum acceleration, you want to keep the car in the lowest gear possible without exceeding redline (or, at least, without hitting the rev limiter). For maximum fuel economy, you want to keep the car in the highest gear possible without lugging the engine.

On the track, I upshift at redline. The revs rise pretty rapidly and you might overshoot the redline by anywhere from 100 to 600 RPM, but aim for redline and you'll be pretty close.

On the street, I generally upshift somewhere around 3000 RPM or so, although it can depend on traffic and other road conditions (like whether I'm trying to get around that damn SUV with the woman driver yakking on her cell).

And I don't understand why you say the power stops at 8K...

 

well from the dyno i seen of stock itr, the power stops at 8k and starts dropping from there

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EG type GTR &raquo;</TD></TR><TR><TD CLASS="quote">well from the dyno i seen of stock itr, the power stops at 8k and starts dropping from there</TD></TR></TABLE>

so what's your point anyways? these guys just explained why they would shift at blah blah point and why.


and most of the time. they will rev it to 8400 cuz it's the redline on the motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EG type GTR &raquo;</TD></TR><TR><TD CLASS="quote">well from the dyno i seen of stock itr, the power stops at 8k and starts dropping from there</TD></TR></TABLE>

You're referring to the horsepower peak. For maximum acceleration, you don't upshift at the horsepower peak (which I thought is less than 8K stock). You upshift either (a) where the horsepower drops to the point where the power is equal before and after the upshift, or (b) at redline, if it is still higher at redline than it will be in the higher gear after the upshift. And that's why you shift at redline in the ITR.