Launching techniques?

Road race, Auto X, or the Drag Strip

Launching techniques?

Postby vip09 » Sat May 27, 2006 5:53 am

I ran at the local 1/8th mile track tonight for the first time in the alltrac. My 60's were horrible.. I got a 2.1 no matter what I did. I get those times in my fwd gt-s. What are you guys doing that get sub 2.0's?

Here's my slip from tonight. The track is 50ft short of an acutal 1/8th, so it would probably be around a 9.2 @ 76 or so on a normal track. I was running 9psi boost.

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Best GT-S STOCK times: 1/4: 14.788 @ 94.98mph 1/8: 9.640 @ 75.87mph
Best Alltrac times: 1/4: 12.2 @ 115mph 1/8th: 7.9 @ 91mph
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Postby SuperWhite92 » Sat May 27, 2006 6:55 am

my best 60' was a 1.81 with Ecsta 711's (Crappy tires). My technique was taken straight from Mr. Chinshue himself-- drop the clutch from 6k and let 'er rip. Having an upgraded clutch doesn't hurt.

My best on the stock clutch was a 2.05, which was obtained with a strategic slip from about 5k.
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Postby vip09 » Sat May 27, 2006 4:15 pm

I have an RPS Max clutch w/ street disc. First I tried dumping the clutch at 6k rpm. It fell on its face right after the launch.. bogged really bad. No wheelspin or clutch slip. Next try I held it right before the rev limiter and right before i lauched I pinged the rev limiter a couple times to build boost, then dumped the clutch.. same outcome, bogged horribly.. no wheelspin or clutch slip. On my last run I launched around 6 grand again, but I slipped the clutch a little, it didn't bog nearly as bad but I still ended up with a 2.1 60'. Also, my car feels like it has no low end power whatsoever. It's godly slow until the turbo spools at 4k rpm.
Best GT-S STOCK times: 1/4: 14.788 @ 94.98mph 1/8: 9.640 @ 75.87mph
Best Alltrac times: 1/4: 12.2 @ 115mph 1/8th: 7.9 @ 91mph
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Postby vip09 » Mon May 29, 2006 5:07 am

Soo.. nobody has tried different launching techniques?
Best GT-S STOCK times: 1/4: 14.788 @ 94.98mph 1/8: 9.640 @ 75.87mph
Best Alltrac times: 1/4: 12.2 @ 115mph 1/8th: 7.9 @ 91mph
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Postby wizzards581 » Mon May 29, 2006 5:34 am

4 awd stay close 2 redline. jus floor it.
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Postby Gary » Mon May 29, 2006 5:38 am

wizzards581 wrote:4 awd stay close 2 redline. jus floor it.

What is your 60' time with that technique.
What clutch?
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Postby vip09 » Mon May 29, 2006 5:43 am

wizzards581 wrote:4 awd stay close 2 redline. jus floor it.


yeah, i tried this. It jumped forward and bogged.
Best GT-S STOCK times: 1/4: 14.788 @ 94.98mph 1/8: 9.640 @ 75.87mph
Best Alltrac times: 1/4: 12.2 @ 115mph 1/8th: 7.9 @ 91mph
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Postby SuperWhite92 » Mon May 29, 2006 6:18 am

vip09 wrote:
wizzards581 wrote:4 awd stay close 2 redline. jus floor it.


yeah, i tried this. It jumped forward and bogged.


If it jumped and bogged, that means you're giving it too much clutch. Slip the clutch a bit slower.
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Postby d1alltrac » Mon May 29, 2006 6:47 am

i have never taken my car to the drag strip and im sure launching on the street is a whole different animal but...i have found the way i get the best launches (or what feels like it) is the slipping technique...i just bog if i dump it.

lol...just the other day my brother was following me when we were getting some gas and i launched at a red light. when we got home he was all happy and telling me how badass it looked cause the rear end came out on the launch...lol :P
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Postby alltracshoak » Mon May 29, 2006 7:06 am

i dont know if im breaking my motor or not but then if i rev still it at 5 to 6k and dump the clutch, it boggs down,i if i keep revving at 4 to 6 and dump it, it'll take off.probably when i rev it between 4 and 6 and dont let my rpm stays at a constant place, it seems i get my turbo spool while i do that and also giving me a way better launch.just my opinion but i dont know if it will harm the transmission anyhow.
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Postby theUNYTEDone » Mon May 29, 2006 10:01 am

my friend says that the best way for him to launch his evo8 (MiGHT'VE been with an SRT4, though<--his previous car)is to "mesh" the gears slightly to build boost, that way the launch isn't bogged out....is it possible to use this method with our cars???
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Postby Conan » Mon May 29, 2006 10:21 am

theUNYTEDone wrote:is to "mesh" the gears slightly to build boost

What the hell does that mean :shrug:
When in doubt - increase boost.
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Postby theUNYTEDone » Mon May 29, 2006 10:41 am

i suppose it would entail kind of slipping the clutch to have them engaged, to produce a load on the engine/turbo...? :shrug: i've personally never even TRiED to launch. too scared. :doh:
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Postby grip addict » Mon May 29, 2006 5:48 pm

theUNYTEDone wrote:i suppose it would entail kind of slipping the clutch to have them engaged


err... right.
imo the best way to launch a mostly stock alltrac is a quick slip.
rev up to 6 or something similar, move to the friction point on the clutch, then as soon as the car starts to move, floor the gas and quickly let out the clutch. don't sidestep it, otherwise you'll bog.
do it a few times and you'll be able to get away without burning the clutch.
i need to warn everyone-
ATSAaron wrote:You specifically told Matt that "some kid dumped sand into my motor."

don't let some kid dump sand into your motor.
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Postby alltracshoak » Mon May 29, 2006 7:02 pm

i think by revving it back and forth from a range of rpms will help it build boost.that's my technique and i had never gotten a bad launch from it. 8)
Last edited by alltracshoak on Tue May 30, 2006 4:55 am, edited 1 time in total.
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