2nd gear launches in a 4x4 cosworth
01-07-2009, 11:08 PM
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2nd gear launches in a 4x4 cosworth
anybody tried 2nd gear launches in a 4x4 cosworth with launch control
its in my mk3, weighs 1000 kilos with arround 550bhp, l/c set about 23psi, am i asking for trouble
also barra box, 7 1/2 plated rear diff and quaife thick wall front diff with atb diff
its in my mk3, weighs 1000 kilos with arround 550bhp, l/c set about 23psi, am i asking for trouble
also barra box, 7 1/2 plated rear diff and quaife thick wall front diff with atb diff
Last edited by mk3cosworth; 01-07-2009 at 11:15 PM.
01-07-2009, 11:32 PM
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01-07-2009, 11:51 PM
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Nope. It also wasnt any slower though. Did countless launches using launch control from 1st and a couple from second and they were all within about .2 of a second to 60 and about .5 to 100. My car also has a very long first gear reaching almost 70 which also helps.
I could also match the time just about with a manual launch but then you only get a perfect 1 every few attempts where with the launch control it monitors everything and does it for you and its the same every time!!!! (cheating I know)
I could also match the time just about with a manual launch but then you only get a perfect 1 every few attempts where with the launch control it monitors everything and does it for you and its the same every time!!!! (cheating I know)
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02-07-2009, 09:47 AM
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funny, I was thinking the same thing yesterday 
I was going to try it the next time I took the car out. Then probably change the clutch
I was going to try it the next time I took the car out. Then probably change the clutch
02-07-2009, 10:22 AM
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using msd system, its there now, picking it up tomorrow and racing saturday/sunday 1/4 mile
ye thats one of my worries along with alloy flywheel
ye thats one of my worries along with alloy flywheel
02-07-2009, 11:59 AM
#16
Hello Fella,
Going ok actually, we have a peak of 42psi and holding onto around 38 all the way. Nothing to report other than what Will has discussed with you. Going to try another couple of launch points and retard algorithms and ultimately give you a couple of chips to try that may suit different road surfaces for you if the lower launch points bog a little.
Going ok actually, we have a peak of 42psi and holding onto around 38 all the way. Nothing to report other than what Will has discussed with you. Going to try another couple of launch points and retard algorithms and ultimately give you a couple of chips to try that may suit different road surfaces for you if the lower launch points bog a little.
Last edited by Stu @ M Developments; 02-07-2009 at 12:18 PM.
02-07-2009, 12:42 PM
#20
Erm, I wasnt joking, I really am doing that. 
Dont worry, they are free, im just trying to perfect your package for various road surfaces.
Edited to say:
Dammit, just realised you meant the bill not the launch control.
for me.
Dont worry, they are free, im just trying to perfect your package for various road surfaces.
Edited to say:
Dammit, just realised you meant the bill not the launch control.
for me.
Last edited by Stu @ M Developments; 02-07-2009 at 12:43 PM.
02-07-2009, 12:43 PM
#21
what ratio is the diff mate?
i know we were trying this way back with the 3.9 diffs rather than the 3.6's and there was very little to choose between them really as you couldn't rally change fast enough from 1st to 2nd to make sure of the extra acceleration, but, at the same time, you lost a bit pulling away in 2nd but it was a nice big rush of power
if you can hit 60 in 2nd though it might be worth a few tries to get the right take off, but if it's 4wd them 1st gear launching ftw
i know we were trying this way back with the 3.9 diffs rather than the 3.6's and there was very little to choose between them really as you couldn't rally change fast enough from 1st to 2nd to make sure of the extra acceleration, but, at the same time, you lost a bit pulling away in 2nd but it was a nice big rush of power
if you can hit 60 in 2nd though it might be worth a few tries to get the right take off, but if it's 4wd them 1st gear launching ftw
02-07-2009, 12:58 PM
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Nope. It also wasnt any slower though. Did countless launches using launch control from 1st and a couple from second and they were all within about .2 of a second to 60 and about .5 to 100. My car also has a very long first gear reaching almost 70 which also helps.
I could also match the time just about with a manual launch but then you only get a perfect 1 every few attempts where with the launch control it monitors everything and does it for you and its the same every time!!!! (cheating I know)
I could also match the time just about with a manual launch but then you only get a perfect 1 every few attempts where with the launch control it monitors everything and does it for you and its the same every time!!!! (cheating I know)
how quickly can it reach 100mph?
02-07-2009, 02:33 PM
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ha ha ye right, i get freqent flyers miles now
what ratio is the diff mate?
i know we were trying this way back with the 3.9 diffs rather than the 3.6's and there was very little to choose between them really as you couldn't rally change fast enough from 1st to 2nd to make sure of the extra acceleration, but, at the same time, you lost a bit pulling away in 2nd but it was a nice big rush of power
if you can hit 60 in 2nd though it might be worth a few tries to get the right take off, but if it's 4wd them 1st gear launching ftw
i know we were trying this way back with the 3.9 diffs rather than the 3.6's and there was very little to choose between them really as you couldn't rally change fast enough from 1st to 2nd to make sure of the extra acceleration, but, at the same time, you lost a bit pulling away in 2nd but it was a nice big rush of power
if you can hit 60 in 2nd though it might be worth a few tries to get the right take off, but if it's 4wd them 1st gear launching ftw
3.6, by the sounds of it, it will be 1st gear.
maybe a ffd sequentil with drop off handbrake for the future
02-07-2009, 03:12 PM
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02-07-2009, 09:08 PM
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02-07-2009, 10:34 PM
#33
Hello Fella,
Going ok actually, we have a peak of 42psi and holding onto around 38 all the way. Nothing to report other than what Will has discussed with you. Going to try another couple of launch points and retard algorithms and ultimately give you a couple of chips to try that may suit different road surfaces for you if the lower launch points bog a little.
Going ok actually, we have a peak of 42psi and holding onto around 38 all the way. Nothing to report other than what Will has discussed with you. Going to try another couple of launch points and retard algorithms and ultimately give you a couple of chips to try that may suit different road surfaces for you if the lower launch points bog a little.
what he needs now is a change over board and a switch on the dash to shift between strategies
02-07-2009, 10:51 PM
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Did I get wrong end of stick? Saw this from stu -
Whatever turbo, 42 psi should be nippy!
Originally Posted by Stu @ M Developments
And the fact my launch control product is designed to bring the turbo on boost so you have a GT30 with 25psi at your disposal when you release the clutch. 
