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Old 06-16-2004, 03:46 PM   #26
STI_Jaguar
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ok, I just brought it to my friend who launched the **** out of it during lunch hour.

I was being too timid with the pedals and wasn't flooring it like I should.

Yes, now I know this car can really take off and I am happy. Back to normal driving.
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Old 06-16-2004, 05:59 PM   #27
Big Turkey
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Here is something I learned from AZScoobie awhile back. When you are up to the tree, start to back out on the clutch until you feel the car creep forward a little bit, then put your foot back in about 1/4 inch. Then rev up to 3000RPMs and wait for the light. When the tree starts to fall, on the second light, floor it and watch the tach. When it swings by 5500 RPMs, just lift your clutch foot up. Don't sidestep it, don't slip it, just lift it up. But you have to make sure that you let the clutch out almost to the point where it engages.

If you don't lift up your foot quickly enough, then it'll ride the clutch, and that just leads to another burnt clutch. If you drop it, then that's just going to break things, and that's what we're trying to avoid here.

If you do it just right, it should break the front tires loose for a split second, lock up the rear and shoot you forward. I'll get a vid of it where I'm doing it on the street later tonight.

Wally
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Old 03-16-2005, 11:21 PM   #28
ksskateboard
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if you were to hold the 5500 rpms would the clutch burn with the cluth depressed all the way down or do you have to put the clutch in for it to burn?
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Old 03-17-2005, 12:29 AM   #29
z
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New to MT, huh?
<MT101>
OK. When you're foot is off the clutch pedal that means the clutch disk (which is connected to the transmission) is making full contact with the flywheel (connected to the engine) thereby transferring the rotation of the engine to the transmission. The pressure plate pushes the clutch disk against the flywheel.
When you push down on the clutch pedal, you're dis-engaging the clutch disc from the flywheel. They are not touching. You can pretty much floor the throttle and the engine will turn and turn (up to whatever the rev limit is set to) but will not burn your clutch because there's space between the flywheel and clutch disk. as you let the clutch pedal out the clutch disk moves closer and closer towards the flywheel until they are touching. Kind of like a clutch disk sandwich where the clutch disk is the meat and the flywheel is the bread on one side and the pressure plate's the other piece of bread.
When the clutch pedal is completely out, the pressure plate squeezes the meat into the flywheel so that the speed of the transmission is spinning at the speed of the engine. (no i'm not going into gear ratios)
it's at that point where the clutch and flywheel are starting to engage that you'll feel the car start to creep forward as Big Turkey described. if you were to floor the throttle right there you would start smelling burnt clutch because the transmission side is not moving and the engine side is spinning at 3000 rpms. That's why he says push the clutch pedal down 1/4 to put that little bit of space back in the sandwich. After that's it's basically just ease down on the throttle, ease out on the clutch till they're hooked up and go, go, go
</MT101>
remember learn to walk before you learn to run. Or you're gonna be crying at the dealer with a sheared off 1st gear going "what do you mean, abuse"?
$4000!!!!

BTW- holy dead thread batman. you're lucky i'm feelin good tonight, kid.
Many other forums to pose that question besides PPB. Like General, or trans, or even OT
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Old 05-05-2005, 12:27 PM   #30
ducmaan748
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I always smell clutch when i launch in my STi, no matter what. I think that im just not releasing the clutch fast enough. Any Ideas?
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Old 05-05-2005, 01:19 PM   #31
offset
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How new is the car/clutch? My guess would be that you do need to get off the clutch faster.

offset
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Old 05-05-2005, 04:12 PM   #32
BadTrip
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Quote:
Originally Posted by ducmaan748
I always smell clutch when i launch in my STi, no matter what. I think that im just not releasing the clutch fast enough. Any Ideas?
Umm.....release it faster?
Seriously, you have three options....get some clutch slippage....get some tire spin....or break some gear teeth.
Clutch replacement is much cheaper than tranny work.
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Old 05-06-2005, 02:41 PM   #33
MeetMrGlock
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Quote:
Originally Posted by STI_Jaguar
How easy is it for you guys to hit 7000 rpms?? I have never ever done it in this car.
try it and get back to us. use your right foot.
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Old 05-06-2005, 07:01 PM   #34
CatfaceType-R
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find out where you can launch fast and good without hurting your car, screw taking advice from us guys who know how to drive because you are just going to end up messing up your tranny attempting to do what we say.....who cares about your times if you can't drive your car home.....14.0 1/4, 1.89 60ft. Try fanning the car smoothly at like 3000 rpm, when you figure how to do that smoothly, move up your rpm's, but make sure you don't drop it...fan it
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Old 05-06-2005, 11:08 PM   #35
AudiTTkiller
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Quote:
Originally Posted by 2002WRXSTi
Beware however..as I finally got the launch down pat and on my last run of the night it felt so good as it hooked off the line then BAM BAM I broke one half shaft and the other hub.

I did this on Neo Gens too so it wasn't like I was using a sticky slick. That and it was hot as all hell with a lousy barometer so I shouldn't even have been making decent power either


if your making 400 whp then you should expect soemthing like that to happen
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Old 05-06-2005, 11:17 PM   #36
2002WRXSTi
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Quote:
Originally Posted by AudiTTkiller
if your making 400 whp then you should expect soemthing like that to happen
Happened when I was making under 300whp. Engine and ECU were stock at the time.
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Old 07-18-2008, 12:48 AM   #37
basicwrc78
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decent explanations
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Old 07-18-2008, 01:01 AM   #38
matty50racer
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I got about half way through reading this thread before I realized it was from 2004 LOL but there is some good advice. I launch almost exactly like Hassassin posted with slightly more clutch slip.
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Old 07-18-2008, 01:12 AM   #39
basicwrc78
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some advices never get too old
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Old 07-18-2008, 01:15 AM   #40
STINOMORMONEY
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I always try to rev match and the ease the clutch out to avoid noise, chatter and i always thought that was good- do i want to bring the clutch out faster
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Old 07-18-2008, 04:53 AM   #41
wrxsti.l
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Tinywrex's Launch Control Patch set to 5000rpm works best for me
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Old 07-18-2008, 07:32 PM   #42
4ST-AIR
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Twin Disc Exedy, 5500RPM LC, slip the clutch I pull a 1.7 60's no problem.

The only bad advice in is some of the when to shift parts. It all depends where you make that peak power. A good 1/4 mile tune means holding 90% of your max power all the way to your shift point (rev limit), otherwise your just wasting gas.

So basically you need to shift at the point you are no longer making that power. what good is going to your rev limit if you drop 150WHP from max to rev. you might have to shift more than the next person but thats the nature of the game.

I may only make 372WHP on my 20psi pump tune but I still maintain 96% of my peak max WHP at 7500RPMs. I sacrifice a little on paper (dyno #'s) but I haul ass through all gears
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Old 05-12-2013, 10:06 PM   #43
WRX Sleeper
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useful info, thanks for answering here.
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Old 05-15-2013, 03:36 AM   #44
BmoreSti
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......
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