Quickest Way of Accelerating in First Gear

[djrem]

out of the factory saxos arent race cars though.

[Joesnow]

What research project are you doing? I would have thought you’d be finished uni now unless you’re doing a masters?

I’m sure Toads pretty much got it spot on though… dont think its got much to do with inertia?... would get max acceleration when the wheels are on the verge of spinning (or the next best thing – slightly spinning, gripping, slightly spinning, griping…) which you could do by blipping the clutch or throttle

What I recon the simulator will have done is given the wheels the max possible torque so that the tyres are constantly on the verge of slipping and its worked out that its better to hold the revs up and slip the clutch slightly than to drop the revs. Or perhaps a perfect combination of the two?

What inputs did you put into the software?

Would have thought it would be pretty tricky to do a perfect start every time unless you’re the Stig… I’m sure that’s how launch control works? Put that data into a controller for the clutch and throttle along with a few other things like coefficients of friction between the tyres and road surface and you’re off!

[Toad]

I'm sure some of you have seen this clip before, but as we're on the subject...

This was done with older gearbox, but it's still a good example. 0 - 60 in roughly 5.5 seconds, no wheel spin, and fed the clutch in from about 3500 rpm. I'm sure if I tried a few more times, I could have got a better start, as this one bogs down a tad. Still...

http://video.tinypic.com/player.php?v=67x172c

[Barry123]

Originally Posted by Joesnow

What research project are you doing? I would have thought you’d be finished uni now unless you’re doing a masters?

I’m sure Toads pretty much got it spot on though… dont think its got much to do with inertia?... would get max acceleration when the wheels are on the verge of spinning (or the next best thing – slightly spinning, gripping, slightly spinning, griping…) which you could do by blipping the clutch or throttle

What I recon the simulator will have done is given the wheels the max possible torque so that the tyres are constantly on the verge of slipping and its worked out that its better to hold the revs up and slip the clutch slightly than to drop the revs. Or perhaps a perfect combination of the two?

What inputs did you put into the software?

Would have thought it would be pretty tricky to do a perfect start every time unless you’re the Stig… I’m sure that’s how launch control works? Put that data into a controller for the clutch and throttle along with a few other things like coefficients of friction between the tyres and road surface and you’re off!

Yeah I'm doing masters man, although my research project is on Suspension Optimisation (Maximising Lateral Acceleration).
My friend is working on a new type of gearbox which I cant bang on about unfortunately, but what i can tell you is it'll be 'mazin' and will kick ass

We're using matlab, the car model is pretty damn complex to put it mildly.
The torque outputs from the engine were obtained across the rev range then interpolated by matlab using Lookup Tables... I doubt there is any problem with the simulator applying full torque to the wheels as there is calculations in place with the gearbox, flywheel, clutch etc, recognising the associated losses with each and the friction co-eff of the clutch plates, mass moment of inertia of the flywheel and every other component. whats happening as i understand, my friend has determined the clutch input over time and the throttle is wide open throughout (i believe)... I'll ask him when he comes in.

[medz_vtrturbo]

if u slip theclutch, it wrecks it in the long run. and if u do wheelspins and full throttle starts it wrecks the driveshafts as well as the tyres. if u want fast accelleration just tune up the car coz u would probably spend more on fixing the car than tuning it.

[dannygti]

i am used to driving bike engined cars (westfields) and they have a "on/off" clutch so it makes launching very hard.the best way i find in that case is to rev it a bit more and get as little wheelspin as possible.