riffraff

and RETed. i think that aftermarket tachs, well good ones atleast, are more accurate than that.. i tell you, i would not feel very confident in my tach if it read 500 rpm under were i really was.

dre_2ooo

That's what I'm thinking, so why is Ted saying

"What you should be trying to do is hit the peak torque"

??????

riffraff

because he probably does not know what he is talking about. just hitting your peak torque will get you nowhere in a race...

now, if you want to stay out of your power band, for say gas economy purposes, then your peak torque might be the place to look.

bingoboy

nice tach bud. why the rest look so dark though. washed out?

dre_2ooo

Yeah Ted is a pretty smart guy... which is what brings the confusion

Probably something lost in communication here, we all must not be on the same page.

riffraff

probably not.. since i too have heard good things about him

My Junx

Oh, yeah I forgot, the whole point of this thread!.....that is a nice tach. But I'll say again, fewer shifts at higher power will get you MUCH lower ETs than more shifts at higher torque.

RX7Kid

The pic cinda sucks but heah its a new camera i am still getting yous to it

NZConvertible

Ted has probably forgotten more than you know...

Ted didn't say "shift at peak torque", he said "what you should be trying to do is hit the peak torque", as in when you change gear, the revs drop to around where peak torque is. Peak acceleration in each gear occurs at peak torque, so it should be obvious why you'd want to be around there.

Felix Wankel

If you have a dyno plot of your car, find the highest point of the curve. You want the RPMs to fall near it when you upshift. I've never revved the **** out of my cars like people on here seem to want to do...

RETed

Boy, turn around and people question your statements...

Dyno your car...you'll see where your peak torque pops up at.&nbsp This is usually around 3kRPM to 5kRPM - notice the wide discrepency for most streetport vehicles.

You want to shift, so that when you get back on the gas, the revs are exactly where the peak torque it.&nbsp This is typically 2kRPM to 2.5kRPM higher than the peak torque is.&nbsp Think about it...peak torque is where you get the absolute most acceleration.&nbsp Torque causes acceleration NOT horsepower.&nbsp It would be easy to surmise that if you want to accelerate the quickest, you want to start where you got the most torque.

All you NA guys revving up to redline and shifting are NOT optimizing your acceleration.&nbsp Don't believe me?&nbsp Dyno the car, find peak torque, and start changing your shift points...

Like Felix Wankel said, I don't understand revving overly high for no reason either...



-Ted

dre_2ooo

OK Thanks

So I should be shifting about 6000-6500 RPMs then?

Just curious if anyone knows the shift points that'll do this on a streetport with stock internals and gearing....

riffraff

problem is that on a streetport engine, at 6k you are maybe mid way in your power band. so you are not really taking advantage of that extra power... when i first got my seven i tried shifting at about 6.5k while racing, and got my *** kicked.. then, with out changing anything else, i waited until 7.5k to 8k so to shift... suddenly i was the one kicking ***.