Peak power at what revs?

16th May 2007, 17:19

Hey sorry for being a noob.

Just wondering if anyone knows (and i presume they do) what the best time to change gear is if for example you wanted to achieve the 0-60mph time that citreon say the VTS can achieve, as i am unsure what it is, i know the revs go to about 6800rpm before hitting the redline but i do not think that this is the best time to change gear in terms of like to keep on pulling quickly to reaching that 7.7sec(?) 0-60mph time.

It is a standard vts nothing modded about it....not yet anyway.

And no, i do not intend on trying this on any road with other cars on it or any public road for that matter.

16th May 2007, 21:12

Here's some tips, just my opinion...

- A little bit of wheel spin off the mark is good, VTS's are high reving cars, so you need the revs up to start quick.
- You need to find where you're power band is. Not that easy... Try accellerating through from low to high revs in 2nd and 3rd gear. Take it all the way to the limiter if required. Do this a few times, and try to get a feel as to where in the rev range the car seems to pull hardest.
- Once you've found your power band, try and stay in it! You need to change up a gear (when doing a 0 - 60 for example) when you feel the power is starting to drop, BUT, don't change up too early, as this might put you too low down in the revs for the next gear. To sum all that bit it up, you need to find a compromise of where the best shift position is. I can bet that if you shift as soon as the power starts to drop, you will probably be too low in the RPM in the next gear. A little trial and error and you should get it spot on!

16th May 2007, 21:14

search function is your best friend! this has been covered loads of times

16th May 2007, 21:18

so what you are saying is you get a quicker 0-60 time if you dont redline it?

16th May 2007, 21:22

basically yeah

16th May 2007, 22:21

vts' rev to 7200 aswell not 6800.

keep it in 2nd all the way to limiter to get best 0 - 60 time aswell, changing to 3rd will use more time.

17th May 2007, 10:45

when i race people 0-60, i change from 1st to second just at the redline and then my car jumps forward into second and from there i just stay in second as i can reach about 62mph in second gear...

17th May 2007, 10:46

that is the way to get the 0-60 as the books state.

17th May 2007, 12:44

At the start keep your revs at around 4500rpm, that'll give you some wheelspin, but high enogh revs to do a decent start.

17th May 2007, 12:47

i found at around 2,200 is good.

17th May 2007, 15:47

Depends on driver for launch rpm.

In a vts changing gear at 7k or higher is best.

remember it might be past maximum power but it will be making more power at 7.2k than at 5.5k in the next gear and will also have shorter gearing. I seem to remember in VTRs there's no point going over 6k really.

17th May 2007, 15:58

proper gay way of doing is to get a rolling road print of the torque profile... then do a gear-split chart. profiling the wheel torque against speed. when each gear torque profile crosses is the point at which to change gear to acheive max acceleration.

I thank you.

17th May 2007, 16:05

saxo technical data
Max Power DIN (hp/rpm) 120/6600
Max Torque DIN (lb ft/rpm) 107/5200

17th May 2007, 16:26

i find slippin the clutch as 3k most effective, but i have more power

17th May 2007, 16:30

I suppose holding it somewhere around 5000rpm for a VTS is best for a standstill start. And then riding the clutch to reduce wheel spin, but keeping the revs up as you let it bite over a short time, as opposed to just dropping it.

17th May 2007, 16:36

i hold it at about 3k, with the clutch nearly up and the car straining against the handbrake, kills the clutch but gives you a better start.

17th May 2007, 18:54

same as me, don have hand brake on though, better?

17th May 2007, 19:03

find a nice smooth level peice of tarmac too

17th May 2007, 22:57

Quote:

Originally Posted by bullit

same as me, don have hand brake on though, better?

yeah, seems to haev less wheelspin as the car is trying to move already.

18th May 2007, 14:57

i hold mine around 5k and dump the clutch and it takes off. toyo r888

18th May 2007, 14:58

i brought the clutch up quick at 2,200 and my car spins all the way to second.
have reasonable tyres too, Michelin pilots.

18th May 2007, 15:00

yea i ran them of a bit i only got 4k out of them till they were on canvas. i get 8-9k on the 888

18th May 2007, 15:15

Try keeping your foot on the throttle when changing from 1st to 2nd it really gives you a kick if you can do it right, i only do this when im racing (private road) though.

18th May 2007, 19:14

Quote:

Originally Posted by williamsvts

vts' rev to 7200 aswell not 6800.

keep it in 2nd all the way to limiter to get best 0 - 60 time aswell, changing to 3rd will use more time.

I was saying that they hit the redline at 6800? it doesnt go over to seven without being in the red?? Unless you have a different vts to me lol.

I understand it may rev up to 7200 before hitting the limiter if that what you meant?

Sorry for noobness

18th May 2007, 23:36

Quote:

Originally Posted by DanT

I was saying that they hit the redline at 6800? it doesnt go over to seven without being in the red?? Unless you have a different vts to me lol.

I understand it may rev up to 7200 before hitting the limiter if that what you meant?

Sorry for noobness

Yeh, thats what he meant. 7200 is the limiter.

19th May 2007, 00:53

Quote:

Originally Posted by giorgio1712

Try keeping your foot on the throttle when changing from 1st to 2nd it really gives you a kick if you can do it right, i only do this when im racing (private road) though.

and how long does your clutch last you?

19th May 2007, 00:55

Quote:

Originally Posted by Mark51

and how long does your clutch last you?

till the end of the road! lol

26th September 2007, 18:46

i start of with about 2500 rpm lift the clutch slowly or shall say try to get the wheel squeaking not spinning and change into 2nd gear at about 6600rpm