MazdaMike

i have a question. i know redline shifting, its pretty basic stay in gear as long as u can. but im confused about powerband shifting. im asuming u are shifting to try and stay in ur peak torgue/HP range but wont that slow u down jumping to a longer gear sooner than u would when u redline? if someone could explain the hpysics of it all i would be pretty happy also on a stock rx7 where would u say the power band shift points are

Freaky Monkey007

powerband shifting is exactly what you just said.. Instead of shifting at readline you shift at peak torque b/c you stop accelerating once your tq drops off. This also helps you stay in the powerband so you are never not accelerating. If you have a purpose built drag car then your redline will/should be where your peak torque is..

jdhuegel1

I'd think a dyno would be the best way to determine that... But I'm sure someone has it graphed out somewhere... Jimlab prolly...

jr

I believe the average for mildly modified cars is peak torque around 7200 RPM's. But every car is different, the only way to know for sure is to get it dyno'd.

Kahren

iTrader: (13)

you want to shift INTO a torque peak not shift when u are at tq peak, on almost any car in production this is far above the redline, so goign to the redline i salways better, unless it starts to drop off dramatically after that. and hen u shift into next gear up u loose a LOT of hp, so its alsays better to stay in lower gear.b

MazdaMike

see this is what im saying there is suck a contraversy

Snook

iTrader: (12)

well, like you should do with every piece of information on this forum (go test it out and make sure it is true for yourself before you trust it)

if you don't have access to a dyno locally or if you don't want to waste 50 bucks go to the track and run the 1/4 mile and try a few different shiftpoints.
Use the same exact launch each time and then shift at 7k one time and then higher the next time or whatever you want.
Run the car 3 or 4 trials and see what comes up.
if your 60 foot times are the same but your 1/4 mile time is better with a certain shiftpoint then obviously if there were no errors in shifting time or any other factors different then that method puts out more hp and tq for your car.
Snook

MazdaMike

good shist