Launching RPM
1 - 20 of 31 Posts
Joined
·
150 Posts
I have a a/t and i break boost from the line. About 3500 rpms. It the a/t no wheel hop.
Joined
·
2,651 Posts
Hold brake, push gas to raise rpm....release brake and mash gas pedal.
Joined
·
2,651 Posts
It's not going to hurt anything ...
Joined
·
1,818 Posts
The only successful launch I've done was in the tunnel on skyline drive. Left it in 2nd and put it up to like 3500 or 4000 RPM and it launched very nicely, no hop at all. The first time I tried it, I had it in 1st gear and ended up hitting the fuel cut-off...
Joined
·
980 Posts
75a teams motor mount bushing for 30 bucks.
Boom can hard launch and spin threw 1St and chirp 2ND.
Had a late model mr2 with fart cans pipe me today when I went to drop of a friend, gunned at the light.
My buddy asked what I had done, the last time I launched it with him in the car, wheel hop breast the crap out of us
Boom can hard launch and spin threw 1St and chirp 2ND.
Had a late model mr2 with fart cans pipe me today when I went to drop of a friend, gunned at the light.
My buddy asked what I had done, the last time I launched it with him in the car, wheel hop breast the crap out of us
Joined
·
307 Posts
I havent really paid a lot of attention to where the dial was when I launch at an autocross, but im thinking around 2k. No wheel hop whatsoever and barely a chirps the tires. I am going to see about launching a little higher next time, possibly even in 2nd around 3-4k. This is with my R-S3's though, all season tires would probably spin much easier.
The VT is not so much about launch RPM as it is about the cadence of the clutch and accelerator. It took me a while to figure this out because it is not like any other car I've owned.
If you start with a lot of RPM - I don't look, but probably above 3k - and drop the clutch the VT will show its Accent drivetrain with a lot of wheel hop. At first I thought this was ECT so I stopped doing it.
I am heavy on the accelerator and engage the clutch at a relatively low RPM and catch the engine as it starts to make decent hp. It loves to spin the wheels as the engine revs. I spin the wheels all the time. But I don't typically chirp them, I grunt them. Chirping is still too much wheel spin and redline comes too quick before you get decent acceleration. If you just grunt the wheels you can get 1st gear to pull much harder and you carry more power in to 2nd gear.
It's hard to explain. But once you do a launch where the wheels just barely spin and 1st gear hooks up there is more acceleration and more boost so when you go in to 2nd the engine stays in the boost. It isn't about the launch RPM but about being able to floor it in 1st to high RPM and keep it floored in to 2nd.
If you start with a lot of RPM - I don't look, but probably above 3k - and drop the clutch the VT will show its Accent drivetrain with a lot of wheel hop. At first I thought this was ECT so I stopped doing it.
I am heavy on the accelerator and engage the clutch at a relatively low RPM and catch the engine as it starts to make decent hp. It loves to spin the wheels as the engine revs. I spin the wheels all the time. But I don't typically chirp them, I grunt them. Chirping is still too much wheel spin and redline comes too quick before you get decent acceleration. If you just grunt the wheels you can get 1st gear to pull much harder and you carry more power in to 2nd gear.
It's hard to explain. But once you do a launch where the wheels just barely spin and 1st gear hooks up there is more acceleration and more boost so when you go in to 2nd the engine stays in the boost. It isn't about the launch RPM but about being able to floor it in 1st to high RPM and keep it floored in to 2nd.
Joined
·
152 Posts
I've never tried keeping it floored between the shift from 1st to 2nd. What's the potential for problems doing that?
Joined
·
322 Posts
Bonus question: How bad is launching for the clutch in a m/t? Whenever I read about people wanting to know the best way to launch, all I can think of is "Oh god no! The clutch!".
Joined
·
96 Posts
I'd say it's no worse than any other car; as long as you aren't flooring it without disengaging the clutch all the way.
Joined
·
11,457 Posts
No worse than any other sort of spirited driving. As long as you aren't power launching at every light I don't see us cooking our clutches that much faster.
I probably misspoke a little bit.
It should have read, " It isn't about the launch RPM but about being able to floor it in 1st to high RPM and keep it floored through 2nd."
You still have to lift briefly when shifting - especially when flooring it and taking to high RPMs. But you have to floor it in each gear to make the VT "sing".
It is the act of having the accelerator good and open when taking off in 1st so the ECU knows you mean business and the hesitation is all but eliminated. You have to catch the clutch once the revs start up. Too soon and there is no turbo yet and it takes way too long for the motor to catch up. Too late and the wheels want to spin too much and 1st is over before you get a chance to floor it and take advantage of the power. Way too late and all you get is wheel hop and redline without going anywhere.
The same thing goes for every gear change when you have been driving normal and you want to accelerate hard. If you just change gears and then floor it there is a lag or hesitation for the power to come on. If you are heavy on the accelerator when as you disengage the clutch the revs to come up quickly and there is no hesitation.
It should have read, " It isn't about the launch RPM but about being able to floor it in 1st to high RPM and keep it floored through 2nd."
You still have to lift briefly when shifting - especially when flooring it and taking to high RPMs. But you have to floor it in each gear to make the VT "sing".
It is the act of having the accelerator good and open when taking off in 1st so the ECU knows you mean business and the hesitation is all but eliminated. You have to catch the clutch once the revs start up. Too soon and there is no turbo yet and it takes way too long for the motor to catch up. Too late and the wheels want to spin too much and 1st is over before you get a chance to floor it and take advantage of the power. Way too late and all you get is wheel hop and redline without going anywhere.
The same thing goes for every gear change when you have been driving normal and you want to accelerate hard. If you just change gears and then floor it there is a lag or hesitation for the power to come on. If you are heavy on the accelerator when as you disengage the clutch the revs to come up quickly and there is no hesitation.
your question is a little difficult to answer ... There are many things that dictate a great launch ... 60ft time ... with my stick cars . track prep for one ... If you are on stock tires at a prepped track ..... i would start with a lower launch rpm ... and incrementally step it up .... until you get a solid not tire blazing launch .... like most have stated getting on boost late .... well your going to be a turd out of the hole .... you hit it to hard and well .... you will let the smoke out of the tires .... now if you want to stop wheel hop ... ( this is track only ) you would need to stop the rear from squatting or front from lifting .... whats happening is your unloading the tires all that nice engine weight is being transferred to the rear ... last time i checked the rear tires are only there to roll on .... I don't know whats out there for the VT-T but if you wanna get the best possible launch .... no front lift and or rear squat ...
hope that helped ..... My wife races her A/T Turbo .... she just stages puts it to the wood ... brings rpm up on the converter around 2850rpm bumps in to lights ... launches with a little baby chirp ..... 25hp wet shot from second gear on ..... embarrasses almost every car she lines up against on grudge night .....
one other thing .... some 18" nitto drag radials will also help if you wanna hit the tires hard .... we have not ran ours yet ... the little tire spin we have right now is perfect
Greg C.
The VT will never be a drag racer. Basically it is a tightly sprung Accent/Elantra with a small quirky and peaky motor.
I've never found that holding any RPM at launch is ideal and lets it make peak power in 1st.
Really low 1st gears are hard to figure out on street cars. German cars are famous for their low 1st gears. Normally you just go through a low 1st gear quickly and then avoid it during normal driving. If you try to overdo 1st you just end up spinning the tires and hitting redline with a lot of noise and not a lot of acceleration. A low 1st gear works when you get a solid launch and let it rev up to redline and carry that power in to 2nd.
I've never found that holding any RPM at launch is ideal and lets it make peak power in 1st.
Really low 1st gears are hard to figure out on street cars. German cars are famous for their low 1st gears. Normally you just go through a low 1st gear quickly and then avoid it during normal driving. If you try to overdo 1st you just end up spinning the tires and hitting redline with a lot of noise and not a lot of acceleration. A low 1st gear works when you get a solid launch and let it rev up to redline and carry that power in to 2nd.
1 - 20 of 31 Posts
