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How to LAUNCH a GTR right!!

West

By West,
in Motorsport Discussion & Builds

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West Grand Master

West

Posted
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... i havn't really practice launch....ect but had a bit of play around with a 2004STI with the work on it and i just couldn't launch my Gtr right, only when we do a rolling start i was about 4 cars length in front but thats not important. I just want to learn how to launch my car right so when i hit calder i could have a good time.

Advices need please :)

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benm Grand Master

benm

Posted
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Take it to the track and practice. Much easier to learn when you have a proper prep'd track and a timeslip to gauge your efforts.

Start low, build up until you either break something or wheelspin and then go with what works best.

[WLDCRD] Mentor

[WLDCRD]

Posted
Posted

exactly what r32boys said......get it above 7000rpm and dont ride it, just release the clutch! if you go too low (rpm) then it will just bog and you will get flogged off the line. Hope you have a decent clutch though!

West Grand Master

West

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Yes i tried anything under 6000rpm and it just Bog down big time. I have after market clutch and i did try to ride the clutch and i've burnt a bit off it, dumb me.

I'm so used to RWD car, launch about 4,5000rpm and never bog down. Is it that easy to break something in a GTR by launching it at 7k?

ferni Grand Master

ferni

Posted
Posted

I've done plenty of launches - only broke a gearbox so far, pretty sure that wasn't because of launching, it was 3rd gear.

If you want half launch i find you can get off the line quick even if your only on about 5000rpm, but you've gotta slip the clutch a little, but you'll need a strongish clutch for that, std one will just slip i think. But yeah you can launch at 7-8k as well, but i find just steping off the clutch doesn't work as well as easing it out.

West Grand Master

West

Posted
  • Author
Posted
I've done plenty of launches - only broke a gearbox so far, pretty sure that wasn't because of launching, it was 3rd gear.

If you want half launch i find you can get off the line quick even if your only on about 5000rpm, but you've gotta slip the clutch a little, but you'll need a strongish clutch for that, std one will just slip i think. But yeah you can launch at 7-8k as well, but i find just steping off the clutch doesn't work as well as easing it out.

What you mean by half launch? At which ...rpm? See you at Winton :)

Fitzpatrick Speed Works Mentor

Fitzpatrick Speed Works

Posted
Posted

Dumping the clutch or side stepping it will break driveshafts, stuff uni's and stuff your clutch center... If you watch all the japs how they do it is the nicest possible way for the best result.

Pull your handbrake on and leave your hand on it pulled up bring the revs to around 6.5+ and pull the clutch out till you can feel the car fighting the handbrake, from here release the handbrake and clutch at the same time and your away.... SOunds hard but by doing this the clutch is already semi engaged and nearly up to speed and all the slack has been taken from all your driveline components. Sure it burns the clutch a little but its no worse than any other method!!!!

ferni Grand Master

ferni

Posted
Posted
What you mean by half launch? At which ...rpm? See you at Winton  :rofl:

Half launch .. dunno how to explain it, getting off the line without bogging down big time, but without launching full on... around 4000rpm and slowly rising the rpm as im slipping the clutch out. I've got a twin plate so its pretty strong compared to a stock clutch... I don't do it that often, as the others have said i'm sure it willbe burning it out doing that... but i found just stepping off the clutch felt to harsh on the car and just didn't feel as smooth.

Not sure if i'll be at Winton (not racing, might come for a watch) if i do, i'll take you for a quick drive to see if i can show you how i launch.

West Grand Master

West

Posted
  • Author
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Half launch .. dunno how to explain it, getting off the line without bogging down big time, but without launching full on... around 4000rpm and slowly rising the rpm as im slipping the clutch out. I've got a twin plate so its pretty strong compared to a stock clutch... I don't do it that often, as the others have said i'm sure it willbe burning it out doing that... but i found just stepping off the clutch felt to harsh on the car and just didn't feel as smooth.

Not sure if i'll be at Winton (not racing, might come for a watch) if i do, i'll take you for a quick drive to see if i can show you how i launch.

Same here, not too sure now as i havn't found a proper set of rims for GTR, i'm running 17/8,5 and 17/9,5 so car handle a bit wierd for a 32Gtr also my Tein is wearing out a bit as well.

yeah i think i know what you mean by a half launch but i think my heavy duty clutch won't hold it as well as your twin plates therefor it will BOG down.

Gav Mentor

Gav

Posted
Posted

Good timeslips in a GTR comes at the expense of wear and tear - literally!

Decide if you have the spare cash for clutches, gearboxes, driveshafts or diffs before you try those rev limiter launches.

That said, a hell hard launch even in a near std R is bloody good fun!!

Squizz Grand Master

Squizz

Posted
Posted
I've done plenty of launches - only broke a gearbox so far, pretty sure that wasn't because of launching, it was 3rd gear.

If you want half launch i find you can get off the line quick even if your only on about 5000rpm, but you've gotta slip the clutch a little, but you'll need a strongish clutch for that, std one will just slip i think. But yeah you can launch at 7-8k as well, but i find just steping off the clutch doesn't work as well as easing it out.

Werd! 4 Clutches and 2 Gearboxes say you're right.

PurpleR32 Experienced

PurpleR32

Posted
Posted
Dumping the clutch or side stepping it will break driveshafts, stuff uni's and stuff your clutch center... If you watch all the japs how they do it is the nicest possible way for the best result.

Pull your handbrake on and leave your hand on it pulled up bring the revs to around 6.5+ and pull the clutch out till you can feel the car fighting the handbrake, from here release the handbrake and clutch at the same time and your away.... SOunds hard but by doing this the clutch is already semi engaged and nearly up to speed and all the slack has been taken from all your driveline components. Sure it burns the clutch a little but its no worse than any other method!!!!

This is the best method, and the one i use. It does take a little getting used to co-ordinating the right actions.

Just dialing up and dumping places too much shock on ALL the driveline components. Basically the handbrake method loads up the drivetrain and puts less stress on the components. Sure it is at the expense of clutch wear, but i would rather put new plates on my clutch than replace a gear in my dog box, or a drive shaft.

Basically there will always be some wear and tear with ANY method of drag racing. Its just up to you which part you want to replace sooner.

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