best way for 0 to 60 sprint
Discussion
ok there are so far 5 ultimas going to the gtbattle on the 25 of june and we are all going to have a go at the sprint i need to work out which is the fastest way to do the sprint (0 - 60 )i have yet to do a competetive sprint .will a straight 1st 2nd gear blast do or will it be better to go straight for 2nd and slip the clutch a bit any ideas will be a help .simon
If you're thinking of doing aggressive launches in second gear, you'll want to use the minimum rpms you can get away with off the line and engage the clutch fully as soon as you can, to minimise the energy put into the clutch. Find the lowest rpm at which you can sustain wheelspin in your launch gear, add 500 rpm or so to allow for the revs to drop as you launch, and try to hold the revs constant until the clutch hooks up. You'll feel a momentary dip in acceleration when this happens, which is your cue to fully engage the clutch and roll the throttle open. If you get it right, you'll get no more than slight wheelspin. If you smoke the tyres you can forget about getting a good time.
Well since I heard about this GT battle thing I also got interested in hard accels, before I always pulled away fast but had no idea of the full potential. I soon found that 1st with a G50/00 box was slighly short and I needed 2nd to get to 60mph. I then found that I could easily out accelerate my speedy, ie I am doing more than 60 when it is still making its way to 40! This lead me to purchase a Race Technology performance meter for more precise measurements and I have been having fun ever since. What I have found to date is that 2nd gear only has given me the best time, as stated the clutch can suffer and the mechanical noise is a lot more noticeable. My main problem with using 1st is with initial grip and it is all too easy to light the rear up and loose gob loads of time. Having said that I am on normal roads which I believe will generally have less grip than any purpose build track/drag strip. So on the day we will have to see which is best. All I can say if G Man is going to be there then I may as well not bother trying as my best time is some way of that achieved in the first Ultima 0-100-0 record!
pb3 said:
Well since I heard about this GT battle thing I also got interested in hard accels, before I always pulled away fast but had no idea of the full potential. I soon found that 1st with a G50/00 box was slighly short and I needed 2nd to get to 60mph. I then found that I could easily out accelerate my speedy, ie I am doing more than 60 when it is still making its way to 40! This lead me to purchase a Race Technology performance meter for more precise measurements and I have been having fun ever since. What I have found to date is that 2nd gear only has given me the best time, as stated the clutch can suffer and the mechanical noise is a lot more noticeable. My main problem with using 1st is with initial grip and it is all too easy to light the rear up and loose gob loads of time. Having said that I am on normal roads which I believe will generally have less grip than any purpose build track/drag strip. So on the day we will have to see which is best. All I can say if G Man is going to be there then I may as well not bother trying as my best time is some way of that achieved in the first Ultima 0-100-0 record!
I might be there but will not compete, but I agree you should not change gear, best times are achieved after 6-10 runs non-stop ( so practise in the car park )
Loosen the rear dampers and lower the tyre pressures
Don't worry about the clutch, better it is fried than the gearbox ..
G man
I wonder how may of us ended up a little disappointed with our gearing when using the G50/00 box, I know I was. Initially, because my top speed was working out to be lower than I expected and later because of trying to get to 60 quickly.
My rev limiter is currently set to 6300, I can happily run to 7000 but even this does not allow me to achieve 60 in 1st, and even if I could pull 8000rpm I would be changing at 50.3mph.
I have also lowered my rear tyre pressures slightly and it does seem to give a little more grip, I guess making the rear dampers softer will help with rearward weight transfer and hence offer further grip, are there any more tricks?
My rev limiter is currently set to 6300, I can happily run to 7000 but even this does not allow me to achieve 60 in 1st, and even if I could pull 8000rpm I would be changing at 50.3mph.
I have also lowered my rear tyre pressures slightly and it does seem to give a little more grip, I guess making the rear dampers softer will help with rearward weight transfer and hence offer further grip, are there any more tricks?
//// fit a 200bhp shot of N2O hehe.
no being serious, try and fit some sticky rear tiers and run the presure a few degres lower than normal (increase the tire contact patch). also lower the rear suspention and soften it off a bit (will help rear weight transfer out the hole shot, the most critical part of the track). practice, you need to get the feel of the car, engine, traction...etc,etc. the more intouch you are the better! even pro guys have to keep practicing! also turn the wing up as much as you can. this will only start to help as the speed rises (and may not on a 0-60 dash) but evey little helps! also try running a passanger! i read about a 7 that did the 60 dash faster 2 up than just with the driver!!!
thanks Chris.
PS. finaly get a copy of this months TRC mag as i think there is a product in there that softens tiers up better than a drag style burn out!!!!!
no being serious, try and fit some sticky rear tiers and run the presure a few degres lower than normal (increase the tire contact patch). also lower the rear suspention and soften it off a bit (will help rear weight transfer out the hole shot, the most critical part of the track). practice, you need to get the feel of the car, engine, traction...etc,etc. the more intouch you are the better! even pro guys have to keep practicing! also turn the wing up as much as you can. this will only start to help as the speed rises (and may not on a 0-60 dash) but evey little helps! also try running a passanger! i read about a 7 that did the 60 dash faster 2 up than just with the driver!!!
thanks Chris.
PS. finaly get a copy of this months TRC mag as i think there is a product in there that softens tiers up better than a drag style burn out!!!!!
its quite difficult to use a stop watch and the speedo as most speedos read fast ,it will be interesting to see the results ,ultimas dont have much of a advantage on a 0 to 60 run ,nothing much works but great traction i feel the 4 wheel drive boys are going to give us a kicking !!!! simon.
No offence intended G Man but this is a little like F1 (over the last couple of seasons anyway), you are Ferrari and we are the others! We are playing catch-up. So when you (Richard) achieved the original record what gearbox did you have in your car and did it have “standard” gear ratios and final drive. I must admit I thought you had a G50/??, but all the info I can find suggests it would not allow you to get to let alone past 60mph in 1st gear. So it must be a Getrag 6 speed with what gear ratios?
I have been looking at alternative gear ratios for my G50/00 box, but this looks like it will all get very expensive by the time they are fitted so I am stuck with:
1 gear = 44.002 MPH
2 gear = 74.797 MPH
…
5 gear = 177.426 MPH
Doh!
Does anyone have experience of charging gears or the exact costs involved, PowerHaus II seem to have a huge range of ratios and would give much better results (on paper anyway)?
I have been looking at alternative gear ratios for my G50/00 box, but this looks like it will all get very expensive by the time they are fitted so I am stuck with:
1 gear = 44.002 MPH
2 gear = 74.797 MPH
…
5 gear = 177.426 MPH
Doh!
Does anyone have experience of charging gears or the exact costs involved, PowerHaus II seem to have a huge range of ratios and would give much better results (on paper anyway)?
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