Best method of launching?

Road race, Auto X, or the Drag Strip

Postby Incubusrocks84 » Sun Jan 16, 2005 4:30 pm

When i first got my alltrac i took it to the track with a full tank of gas :x ... i9 wasn't thinking.... i have a fresh stock clutch on it and i feathered the clutch at like 5500-6000 and i was able to pull a 1.8 twice, nothing less than 2 on the 60ft's

i guess it's all in timming. and keep the turbo spoolin! goodluck.

Cheers!
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Postby yettegog » Fri Jan 21, 2005 3:59 am

i have trouble launching in my car..part of it is that i'm getting used to the spec. st.2 and it's EXTREMELY LOW engage point...but if I try to slip it in from a high rpm i just bog and then get a nice smell of clutch for about 15 seconds. :cry:

Anyone know right off what i might be doing wrong? :shrug:
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Postby SuperWhite92 » Tue Jan 25, 2005 4:13 pm

My guess is that you're trying to slip it too fast, or at least zooming past the catch point. Try a little slower, that Spec will handle it. In fact, once you get it right, you'll know it, your suspension will be lurching so bad you'll be looking into the sky, and you won't be able to breathe for a half second.
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Postby sleeper » Tue Jan 25, 2005 7:29 pm

Hold the car at 4k for 3-4 sec so that you bild up boost before you rev it to 6.5k and let the clutch out!

if you just rev it up whitout bilding boost it`ll will bog!
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Postby Gary » Tue Jan 25, 2005 8:35 pm

^^^^^
How can you build up boost without load?
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Postby sleeper » Tue Jan 25, 2005 9:27 pm

try.... i get it in my car!
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Postby Gary » Tue Jan 25, 2005 9:35 pm

I tried it.
It won't happen with stock setup. :shrug:
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Postby SuperWhite92 » Tue Jan 25, 2005 9:41 pm

Only way I can get boost is bouncing the rev limiter a few times, but I can't hold it to launch, since i don't launch that high in the rpm band
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Postby Gary » Tue Jan 25, 2005 9:45 pm

sleeper wrote:try.... i get it in my car!

Where does your boost gauge hook up to?
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Postby alltracman78 » Wed Jan 26, 2005 12:31 am

yeah, you really can't build boost when your just sitting there....
It will build a little bit if you rev it high, but won't stay...
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Postby yettegog » Wed Feb 16, 2005 2:51 am

yeah, you really can't build boost when your just sitting there....
It will build a little bit if you rev it high, but won't stay...


that was the impression i was under. thanks for the tips guys.[/quote]
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Postby furpo » Wed Mar 02, 2005 12:33 am

i picked up a trick from someone on here that works very well. if you connect the timing wire in the diagnostic box up it will dump all the ignition timing and cause a miss fire at high rpm. i have it set up on a clutch switch so that when i dump the clutch it goes back to normal and i get full (ie factory) boost on the start line.

roger
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Postby SuperWhite92 » Wed Mar 02, 2005 2:28 am

you wouldn't want to do a quick write-up of what you did to make it function like that, would you Roger. That's amazingly helpful for launching.

Also, what kind of clutch are you using, and how does the clutch feel and smell after you launch on boost?
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Postby timg » Wed Jan 18, 2006 8:12 am

92AllTracTurbo wrote:Weird, Guest posting is still enabled?

My opinion a good launch is slipping the clutch at around 5500. If you dont understand what I mean by slipping the clutch, it's basically not letting the clutch out all the way and having the gas all the way down until the clutch fully grabs and let go. Kinda hard to explain... HTH.


i know what you mean.
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Postby EricGT4 » Fri Jan 20, 2006 7:55 am

furpo wrote:i picked up a trick from someone on here that works very well. if you connect the timing wire in the diagnostic box up it will dump all the ignition timing and cause a miss fire at high rpm. i have it set up on a clutch switch so that when i dump the clutch it goes back to normal and i get full (ie factory) boost on the start line.

roger


Yeah thats a two step. My buddy has one on his cobra. Rev limiter is at 3 grand on the 1st step just for the launch and then goes back to 7500 after that. Pretty cool actually.
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