the_legend_of_yrag
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Registered: 7th Jul 03
Location: Cambridgeshire
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Where abouts up the rev range is it best too change gear at? And what is the rev limit on 2.0 16v's?
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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whatever point the peak power is
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jamesvalver
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Registered: 21st Feb 03
Location: Bury St Edmunds, Suffolk
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prob bout 6k rpm in mine and mine doesnt have a limiter
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corsaandy
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Registered: 29th Jan 03
Location: Northamptonshire
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standard rev limit is 6800
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Should change gear just after the peak torque IMO
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DAYZEE
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Registered: 13th Nov 00
Location: Stevenage, MR2 Turbo, 328i Coupe, CBR600F
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quote:
Originally posted by Born_corsa02
Should change gear just after the peak torque IMO
Peak torque is somewhere between 4/5000rpm....
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by Born_corsa02
Should change gear just after the peak torque IMO
so i should change at 2300rpm 
[Edited on 06-05-2006 by Steve]
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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No depending how the car is set up what model it is etc. it is better to change just after peak torque.
Once you have reached the peak torque the car stops pulling as hard and HP takes over.
Don't know why so many people rev the fcuk out there cars it doesn't make em go quick.
How many race drivers bounce off the limiter?
As I said depends on engine and how its set up.
But you really only need to change at high revs on cars like Hondas Vtec or somthing suitably modified.
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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thats all wrong, the torque should remain constant after it reaches its peak, it shouldnt drop off, if it does sumthing is wrong, the torque will tail off right near the very end of the rev range, its best to change at peak bhp as thats where the car is pulling strongest, as you have peak torque which should be holding a constant from earlier on and peak bhp
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mav
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Registered: 19th Jun 01
Location: Scotland
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sure my old Xe was about 4.5k revs...
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Torque will always drop off after it peaks hence the word "peak"
It all depends on the car as I said but all this rev it till its near the limiter and change is bullsh1t. Unless the engine has been tuned or designed to do this.
On a standard/fast road tuned engine this is not the best way to drive a car quickly. It will sound good but put a race driver in a car, and they do not rev them right round or bounce them off the limiter if they want to go fast.
Its all about keeping the car at the revs that it pulls its hardest at if thats from 3k to 5k change gear at 5.5k.
This is just my opinion if some one can come up with some good evidence to convince me otherwise. I will shut up 
[Edited on 06-05-2006 by Born_corsa02]
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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i agree revving the car until redline is pointless, however torque will hold right up until peak bhp so it peaks, and stays peaked if u see what i mean, but will fall off near the redline
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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hence
look at the below rr graph
The bottom shows torque, top bhp, look how torque peaks and stays there and is still at peak right up until peak bhp
[Edited on 06-05-2006 by Steve]
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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http://www.millteksport.com/media/custom/130.xls
Does the torque stay the same here or drop?
As I said all depends on engine as to how you should drive it 
[Edited on 06-05-2006 by Born_corsa02]
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Learn to read a graph on the one you posted
torque peaks at 5750rpm and immediatley tails off
and peak BHP is acheived at 6250rpm
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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peak bhp is actually achieved at 5600, there is a fluctuation at 6250 where it appears to be a bit more but very minor, this could simply be down the RR machine, it would all be extremely minimal in a real life situation.
Youd gain a lot more by holding it until peak bhp and sacrificing a tiny few lb/ft of torque then changing bang on peak torque but only halfway up the bhp curve
if you change as soon as the torque is peaked, then you instantly be out of the power band when your in the next gear
[Edited on 06-05-2006 by Steve]
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Not saying to change bang on peak torque but just after that way in the next gear you would be at the point where the car starts pulling its hardest.
Admit it your wrong and your graph has even proven me right.
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Ry_B
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Registered: 1st Dec 05
Location: Solihull, W Mids Drives: 45BHP beast!
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quote:
Originally posted by Born_corsa02
Should change gear just after the peak torque IMO
Lol so at around 2-3k rpm?
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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well as i understood it you were saying bang on peak torque, if you are now saying not to change at peak torque but after it then it is you that is admitting your wrong
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by Rcb
quote:
Originally posted by Born_corsa02
Should change gear just after the peak torque IMO
Lol so at around 2-3k rpm?
read the whole thread, make your own mind up whos right 
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Get bk in your 1.2 and get a proper engine before talkin about driving quick.
What car apart from a diesel reaches peak torque at 1.5k RPM you dick
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Ry_B
Banned
Registered: 1st Dec 05
Location: Solihull, W Mids Drives: 45BHP beast!
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Lol, just have. Who is that muppet 
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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a lot of turbo petrol cars make peak torque around the 2k mark, n/a ones will be higher
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Ry_B
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Registered: 1st Dec 05
Location: Solihull, W Mids Drives: 45BHP beast!
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quote:
Originally posted by Born_corsa02
Get bk in your 1.2 and get a proper engine before talkin about driving quick.
What car apart from a diesel reaches peak torque at 1.5k RPM you dick
Did I say 1.5krpm? No I said 2-3kRPM 
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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That is crap name me one car that torque peaks at 2k thats petrol i will be amazed.
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