2 Step Launch Control
i think u guys are missing the point im trying to make.
forget the hookup, forget the initial grab.... its a whole lot simpler. again - once the clutch hooks up and u already launch, u r already past 6k rpm, which means u hit redline and have to shift almost instantly into 2nd, hence by 60, u have to shift again, into 3rd, and by the 1/4, im in 4th (in fact im at redline in 4th... almost into 5th)
even if u get the most perfect hook up and launch in the world, its the extra shifting that kills the time !!!! hence if i launch at 5k rpm, i get to shift less, and i get faster times!!!!
forget the hookup, forget the initial grab.... its a whole lot simpler. again - once the clutch hooks up and u already launch, u r already past 6k rpm, which means u hit redline and have to shift almost instantly into 2nd, hence by 60, u have to shift again, into 3rd, and by the 1/4, im in 4th (in fact im at redline in 4th... almost into 5th)
even if u get the most perfect hook up and launch in the world, its the extra shifting that kills the time !!!! hence if i launch at 5k rpm, i get to shift less, and i get faster times!!!!
I have never launched my car and have never run it in the 1/4 but this is how i see it. The best 2 step is one which doesnt bog the turbo yet doesnt smoke the tires. Its the balance which gives you a perfect launch. If the 2 step is set too high, slower times with be yielded due to the fact that the tires arent hooking up.
im not sure i understand what you are saying with regards to your statement. I do underderstand that the less you shift the faster your times will be. Thats obv bc your not going to be accalerating while shifting. But as for your statement saying you shift less im confused. Regardless of the launch rpm most poeple end the run in 4th. If so how are you shifting less? Thats still 3 shifts.
I have never launched my car and have never run it in the 1/4 but this is how i see it. The best 2 step is one which doesnt bog the turbo yet doesnt smoke the tires. Its the balance which gives you a perfect launch. If the 2 step is set too high, slower times with be yielded due to the fact that the tires arent hooking up.
I have never launched my car and have never run it in the 1/4 but this is how i see it. The best 2 step is one which doesnt bog the turbo yet doesnt smoke the tires. Its the balance which gives you a perfect launch. If the 2 step is set too high, slower times with be yielded due to the fact that the tires arent hooking up.
well u can see in my signature, that i have the MR. before the 2step in my car was raised to 6k, i used to be able to hit 60 in 2nd, and 1/4 in 3rd (with the 6 speed)....
now that its at 6k rpm, i hit redline almost instantly after launch, hence i have to shift into 2nd by like 20, and into 3rd by 55.... had the 2 step been lower, i wouldnt hit redline instantly afetr launch, and i wouldnt shift into 2nd till ~35
now that its at 6k rpm, i hit redline almost instantly after launch, hence i have to shift into 2nd by like 20, and into 3rd by 55.... had the 2 step been lower, i wouldnt hit redline instantly afetr launch, and i wouldnt shift into 2nd till ~35
well u can see in my signature, that i have the MR. before the 2step in my car was raised to 6k, i used to be able to hit 60 in 2nd, and 1/4 in 3rd (with the 6 speed)....
now that its at 6k rpm, i hit redline almost instantly after launch, hence i have to shift into 2nd by like 20, and into 3rd by 55.... had the 2 step been lower, i wouldnt hit redline instantly afetr launch, and i wouldnt shift into 2nd till ~35
now that its at 6k rpm, i hit redline almost instantly after launch, hence i have to shift into 2nd by like 20, and into 3rd by 55.... had the 2 step been lower, i wouldnt hit redline instantly afetr launch, and i wouldnt shift into 2nd till ~35
You're doing something wrong. Car speed by gear is going to be the same assuming you're not spinning wheels regardless of where you launch at. You might find by letting it hang at redline for a second your 60' improves, it sounds like something's not hooking up right away.
FWIW some of my best launches have been at 7600 with a rev limit of 8100, I don't have any problems (that aren't driver related
) with 'speed coming too soon'.
well u can see in my signature, that i have the MR. before the 2step in my car was raised to 6k, i used to be able to hit 60 in 2nd, and 1/4 in 3rd (with the 6 speed)....
now that its at 6k rpm, i hit redline almost instantly after launch, hence i have to shift into 2nd by like 20, and into 3rd by 55.... had the 2 step been lower, i wouldnt hit redline instantly afetr launch, and i wouldnt shift into 2nd till ~35
now that its at 6k rpm, i hit redline almost instantly after launch, hence i have to shift into 2nd by like 20, and into 3rd by 55.... had the 2 step been lower, i wouldnt hit redline instantly afetr launch, and i wouldnt shift into 2nd till ~35
I have never driven an MR so I cant comment on how tall the gearing is. But for the 5-speed my 1st gear gets me to ~40-45 and 2nd gets me past 60. Just bc you launch your car at a higher RPM doesnt mean that the gear ratios in the transmission are going to magically get smaller. The gear will get you to a maximum speed no matter what.
I must be missing your point your trying to make
u definitely are. the higher your initial launch rpm, the sooner u hit redline and have to shift. why is this so hard to grasp
^I get that. But at the same time that doesnt mean that your going to have a slower time. The more power your car puts down the faster it will go through the gears. That means you will have to shift sooner. Does that mean your car is going to be slower? no
same happened to me. during tune, the tuner also raised my 2step to 6k rpm up from the factory ~5000rpm. he said i would get a better launch...
however, if i use the 2step (rather than slip/dump the clutch at ~5000rpm on my own), my ET is actually slower. meaning with the 2step its worse.
now that the 2step is at 6k rpm, i hit redline sooner, so i have to shift sooner, hence i reach 60 in 3rd rather than 2nd gear, and reach the 1/4mile in 4th, rather than 3rd ... that extra shift raised my ET from 12.7 to 13.0 (all else being equal), and 60 comes in 4.4 rather than 4.1
so in fact, im always better off using my own method, just slip the clutch a little, let it grab just a little, and then raise the rpm to ~5000 or even less, and dump it... get the fastest times that way. as i said, much faster than using the 2step
however, if i use the 2step (rather than slip/dump the clutch at ~5000rpm on my own), my ET is actually slower. meaning with the 2step its worse.
now that the 2step is at 6k rpm, i hit redline sooner, so i have to shift sooner, hence i reach 60 in 3rd rather than 2nd gear, and reach the 1/4mile in 4th, rather than 3rd ... that extra shift raised my ET from 12.7 to 13.0 (all else being equal), and 60 comes in 4.4 rather than 4.1
so in fact, im always better off using my own method, just slip the clutch a little, let it grab just a little, and then raise the rpm to ~5000 or even less, and dump it... get the fastest times that way. as i said, much faster than using the 2step
i had to repeat myself so many times here, i misspoke.
so, correction, if i launch at 5000rpm, i reach the 1/4 in 4th, and if i launch at 6000rpm, i reach the 1/4 in 5th
these are approximately the speeds in gear, if i launch at 6000
1st: 0-20
2nd: 20-55
3rd: 55-85
4th: 85-108 (i am forced to shift into 5th, right before the 1/4)
5th: 108-whatever ... 1/4 mile at 111-112mph
these are approximately the speeds in gear, if i launch at 5000 (or less)
1st: 0-30
2nd: 30-62
3rd: 62-95
4th: 95-112 1/4 mile at 111-112mph (i cross the 1/4 in 4th gear, at redline, but still dont have to shift into 5th)
so, correction, if i launch at 5000rpm, i reach the 1/4 in 4th, and if i launch at 6000rpm, i reach the 1/4 in 5th
these are approximately the speeds in gear, if i launch at 6000
1st: 0-20
2nd: 20-55
3rd: 55-85
4th: 85-108 (i am forced to shift into 5th, right before the 1/4)
5th: 108-whatever ... 1/4 mile at 111-112mph
these are approximately the speeds in gear, if i launch at 5000 (or less)
1st: 0-30
2nd: 30-62
3rd: 62-95
4th: 95-112 1/4 mile at 111-112mph (i cross the 1/4 in 4th gear, at redline, but still dont have to shift into 5th)
Last edited by S6devil; Jun 30, 2009 at 10:46 AM.
i have no idea how you get 95mph out of 3rd gear, i only get about 85 max but thats not taking it past 7000. if youre only getting to 20mph in 1st then you should stay in first gear longer until you get up to the 30 or so mph that you normally get
i had to repeat myself so many times here, i misspoke.
so, correction, if i launch at 5000rpm, i reach the 1/4 in 4th, and if i launch at 6000rpm, i reach the 1/4 in 5th
these are approximately the speeds in gear, if i launch at 6000
1st: 0-20
2nd: 20-55
3rd: 55-85
4th: 85-108 (i am forced to shift into 5th, right before the 1/4)
5th: 108-whatever ... 1/4 mile at 111-112mph
these are approximately the speeds in gear, if i launch at 5000 (or less)
1st: 0-30
2nd: 30-62
3rd: 62-95
4th: 95-112 1/4 mile at 111-112mph (i cross the 1/4 in 4th gear, at redline, but still dont have to shift into 5th)
so, correction, if i launch at 5000rpm, i reach the 1/4 in 4th, and if i launch at 6000rpm, i reach the 1/4 in 5th
these are approximately the speeds in gear, if i launch at 6000
1st: 0-20
2nd: 20-55
3rd: 55-85
4th: 85-108 (i am forced to shift into 5th, right before the 1/4)
5th: 108-whatever ... 1/4 mile at 111-112mph
these are approximately the speeds in gear, if i launch at 5000 (or less)
1st: 0-30
2nd: 30-62
3rd: 62-95
4th: 95-112 1/4 mile at 111-112mph (i cross the 1/4 in 4th gear, at redline, but still dont have to shift into 5th)