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Old 01-10-2002, 10:12 PM   #1
DDMan
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Default Using E-Brake for launch?

Iv got this video of an STI WRX in japan doing an e-brake launch on a manual.

Pretty much, he pulled the e-brake and used it to hold the car while he put out the clutch a little and added gas to prevent a stall. He held it right at 2k, and to launch he just slammed the e-brake down and did a perfect launch (no tire burn or 5k clutch drop) ran a 13.6 stock too

SO.....with all that, how bad is using the e-brake to hold th car in place on the center diffy? I know its not the best on the clutch, but will I kill my center differential by using it?
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Old 01-10-2002, 10:45 PM   #2
remarcable
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I didn't know the e-brake was that strong.

Mine barely keeps the car from moving at idle in 1st or reverse. Barely.
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Old 01-11-2002, 01:35 AM   #3
Penphoe
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Thumbs up I do that!

That's what I do at the drags and auto-x. Pull the e-brake so I don't roll forward or backwards, rev till about 4-5k and slowly let the clutch out until I feel it BARELY grab. Yes, its hard on the clutch, yes, I know I'm "burning" the clutch, but as soon as I see the yellow lights I drop the e-brake, release the clutch and squeeze the gas. It's my patented stinky-clutch launch - only used at the track. It's allowed me to beat a supercharged Formula Firebird to 60 ft! And that was carring another passenger too! Of course I lost the race. You didn't expect me to win down the 1/4 mi against that thing did ya?

LaterZ!
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Old 01-11-2002, 02:26 AM   #4
garface
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can you post a link to the vid, if it's on the net somewhere.
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Old 01-11-2002, 09:13 AM   #5
d00f
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Actually he was using a lever to adjust his centre diff. If you look closely in the video there is still an e-brake there. I don't see any value in using the ebrake to launch as it's not strong enough and won't really do anything for you.

-Michael
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Old 01-11-2002, 09:44 AM   #6
DDMan
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ill post the video a little later, and mine is REALLY strong then. cuz I can EASILY stall the car keeping it at 2k and letting the clutch out too much (did it accidentally).
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Old 01-11-2002, 09:46 AM   #7
DDMan
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Heres the link....hopefully iy will work, and its 3.25 meg


ftp://ftp:ftp@63.78.32.32/toyota_mr2...ru_wrx_(1).avi

right click then go to "save as"

cant watch it on the net
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Old 01-11-2002, 11:07 AM   #8
FargoRS
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Wouldn't using E-brake help build Boost since the engine is under load Guess I should try it today

Mike
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Old 01-11-2002, 01:35 PM   #9
Penphoe
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Quote:
Originally posted by d00f
Actually he was using a lever to adjust his centre diff. If you look closely in the video there is still an e-brake there. I don't see any value in using the ebrake to launch as it's not strong enough and won't really do anything for you.

-Michael
Well, I use the e-brake to hold my car in place. I'm limiting the amount of power that goes to the ground through my clutch because I'm allowing it to slip.

You're right, the e-brake is not strong enough to hold a car from moving given enough power - I'm limiting the power going to the ground.

LaterZ!
Darren!!
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Old 01-11-2002, 02:59 PM   #10
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Can't download it right now, but is that the one with the white Rex going against an MR2 and the driver starts laughing after seeing his lead?
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Old 01-11-2002, 07:40 PM   #11
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Quote:
Originally posted by garface
Can't download it right now, but is that the one with the white Rex going against an MR2 and the driver starts laughing after seeing his lead?
Yup! That's the one. Gotta love that dude's laugh eh?

LaterZ!
Darren!!
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Old 01-12-2002, 12:17 PM   #12
d00f
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That seems to me like an expensive way to fry your clutch and take 0.01 off your trap time. Bearing in mind you can afford to roll forward about 5cm after being staged I doubt this is going to give you any improvement.

What you really need is launch control. It lets you hold the car at 1/2 throttle while selectively misfiring cylinders (not like antilag) in order to build boost under no engine load. It sounds really nasty but imagine having 8-10 PSI of boost when the tree goes green.

From what I can tell this doesn't beat your turbo to pieces like ALS because it's not backfiring, it's just not firing the injectors on some cylinders and in effect just pumping air through to spool the turbo. Spitting flames at the staging area would still be cool with true ALS

-Michael
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Old 02-09-2004, 11:07 AM   #13
Turb0flat4
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Default I use the same method

Hey there, I know this is late in this thread, but I just stumbled on it when I did a search for "launching with ebrake". I use the same method on the drag strip with good success, never bog the launch, unlike when I use just the gas and the clutch. I'm just wondering, like the orig poster, whether this will be hard on the center diff. I would guess not, because the clutch won't be fully engaged when the ebrake is on, but I'd like a definitive answer. Thank you.
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Old 02-09-2004, 11:53 AM   #14
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me too... ha ha good thread.

edgar,
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Old 02-10-2004, 02:00 AM   #15
KoneKiller
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It will be hard on everything! Clutch, diff, geabox, CV's, axles, ebrake...

So what if you break stuff... that's what money is for!! I mean come on... it's JUST a car!
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