New Tach
#26
smog nazi destroyer
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.
#27
Originally posted by riffraff
on my streetport , when racing, i usualy shift around 7500-8000rpm..
if you shift at 4k, then what is the point of having any power, because you are barely (if that) reaching your power band. when racing, you want to keep in your power band as much as possible. that generally means shifting after your peak power, so that you end up starting the next gear in the meaty part of your power band ( as junx said)
on my streetport , when racing, i usualy shift around 7500-8000rpm..
if you shift at 4k, then what is the point of having any power, because you are barely (if that) reaching your power band. when racing, you want to keep in your power band as much as possible. that generally means shifting after your peak power, so that you end up starting the next gear in the meaty part of your power band ( as junx said)
"What you should be trying to do is hit the peak torque"
??????
#28
smog nazi destroyer
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.
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.
#30
Originally posted by 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.
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.
Probably something lost in communication here, we all must not be on the same page.
#32
Rotary Father
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.
#34
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally posted by riffraff
because he probably does not know what he is talking about.
because he probably does not know what he is talking about.
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.
#35
Super Newbie
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...
#36
Lives on the Forum
Boy, turn around and people question your statements...
Dyno your car...you'll see where your peak torque pops up at.  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.  This is typically 2kRPM to 2.5kRPM higher than the peak torque is.  Think about it...peak torque is where you get the absolute most acceleration.  Torque causes acceleration NOT horsepower.  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.  Don't believe me?  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
Dyno your car...you'll see where your peak torque pops up at.  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.  This is typically 2kRPM to 2.5kRPM higher than the peak torque is.  Think about it...peak torque is where you get the absolute most acceleration.  Torque causes acceleration NOT horsepower.  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.  Don't believe me?  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
#37
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....
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....
#38
smog nazi destroyer
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 ***.
Thread
Thread Starter
Forum
Replies
Last Post
befarrer
Adaptronic Engine Mgmt - AUS
3
09-22-15 09:33 AM