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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 01:05
 
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| dimmy77_03 wrote on Sat, 08 May 2004 21:32 |
Im not too good at this either... but isnt dumping the clutch when you put the gas down and rev the crap out of the engine and then just let the clutch up fast but gradually. So your car sits there screching and smoking like crazy??? 
Sorry if im wrong...
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A clutch dump is when you give it revs and then sidestep the clutch so that it grabs as quickly as possible.
| Jag7799 wrote on Sat, 08 May 2004 22:17 |
can someone explain double clutching to me with some sort of written example
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You've been watching too much Fast & Furious haven't you?
Double clutching is when you're driving a box with no synchros. It's not a performance thing.
If you're really curious over the actual method, do a search, it's been covered many times before.
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 01:07
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i was just asking cause a guy said it to me and i was sure it was somehting u only do on dog box's
like he was like "u need to learn to douyble clutch" and im like "wtf"
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 01:42
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double clutches are great when your synchros are on the way out - but not in a drag race. then you should be "granny shifting" as vin diesel so elequantly puts it
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Location:
Melbourne
Registered:
November 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 03:27
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As I understand it double clutching is just when you put the box into neutral, clutch out, blip the throttle to get the revs up (to sync the 2 halfs of your gearbox), clutch in then slide it into gear. There is no way you should be doing it on the way up (unless your syncros are screwed) but it can be helpful for getting it into gear smoothly if you do it on the way down. My syncro on second isn't so great so unless I'm going real slow I have to do it to get into 2nd from 3rd. Some people combine this with breaking, and that is known as heel-toeing.
Thats what Vinny is talking about in that movie that got everything wrong. Not that I know why the hell you would double clutch in a drag... 'cept perhaps afterwards... but I would just put it in neutral and coast to a stop... I guess I'm just not a proper street racer.
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Location:
Brisbane
Registered:
February 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 03:30
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yep - double clutching only useful if you've abused your gearbox so badly that there are no syncho teeth left to assist you with gear changes...
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 03:53
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| Shraka wrote on Sun, 09 May 2004 13:27 |
I guess I'm just not a proper street racer.
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'cause you dont use NAAAAAAAAAWZ
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Location:
Melbourne
Registered:
November 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 04:37
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| draven wrote on Sun, 09 May 2004 13:53 |
| Shraka wrote on Sun, 09 May 2004 13:27 |
I guess I'm just not a proper street racer.
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'cause you dont use NAAAAAAAAAWZ
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It's true, I don't. I do have a Lancer though! I just need some stickers and neons and I'll be a real street racer!!! Just like I always wanted! 
... Oh and a NOS system installed into my cam cover
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Location:
Brisbane
Registered:
June 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 05:00
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thing is jag7799, Ed's car probably does have more damaging drivetrain torque off the line than yours, unless u are fully launching it with full boost...
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 05:10
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| Shraka wrote on Sun, 09 May 2004 13:27 |
Some people combine this with breaking, and that is known as heel-toeing.
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You don't double-clutch when you heel-toe.
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Location:
Adelaide
Registered:
May 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 05:19
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All i can say for the GZE owner is get good tyres. I have 195s at the front which are remarkably easy to smoke up.
As for the dumping off the line, highpowered RWD is hard to get right. Practice lots
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Location:
Brisbane
Registered:
March 2004
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 05:29
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You can match revs without needing to double-clutch.
That's why heel-toeing doesn't involve double-clutching.
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 12:16
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well i was at work all day but it seems i missed alot
I think at willowbank im just gonna pussy it off the line and hope for low 13's
on dry road after gear changes how do single spinners go on high powered cars?.. the end doesent step out does it?..
still a week away from my car 
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 12:37
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the back stepping out is a characteristic of an LSD - both wheels spin, one slightly harder than the other, hence the back steps out.
Single spinners will still do it, around corners especially. Best way to think of it is this: it's easier to spin the wheel(s) when you dont have an LSD, but equally the effect is less violent if you dont have an LSD. The loss of traction of one of the wheels can be enough to make the back break during hard cornering, but generally speaking you get yourself in less trouble without an lsd (and go round a track slower)
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 12:59
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how did ur ma61 diff put up with it?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 13:02
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well, I broke the car before I broke the diff :\
Norbie ripped his a new one, but generally a ma61 diff should be able to cope with a reasonably standard 1jz (boost, cooler, zorst) for a while
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 13:13
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norbie makes considerably more torque though
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 13:16
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one would hope so.
Hence me predicting it would last substantially longer behind a 1jz 
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Location:
Brisbane
Registered:
June 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 13:27
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launching my thing is going to be difficult i dare say
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 13:47
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no doubt it will be.. ur gonna have to baby gearbox and diff
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Location:
Melbourne
Registered:
November 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 23:39
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How do you match speeds of the two halves of your gearbox without letting the clutch out to spin the top(?) half up?? And if you are letting the clutch out between gears, isn't that double clutching? If not, what the hell is double clutching?
And LSDs are less safe than single spinners? Never heard that before... I suppose it makes sense though.
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Location:
Cabramatta, NSW
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Sun, 09 May 2004 23:48
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| Shraka wrote on Mon, 10 May 2004 09:39 |
How do you match speeds of the two halves of your gearbox without letting the clutch out to spin the top(?) half up?? And if you are letting the clutch out between gears, isn't that double clutching? If not, what the hell is double clutching?
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Clutch in
Rev whilst selecting lower gear
Clutch out
(If you're heel-toeing, do all of this while breaking)
As opposed to double-clutching:
Clutch in
Select neutral
Clutch half out
Rev
Clutch in
Select lower gear
Clutch out
Rev matching spins up the engine so that there's not that massive shock load when you engage the clutch and the box'es revs don't match the engine's.
Double clutching adds in the extra step to spin up the gears inside the box to match the revs also.
| Shraka wrote on Mon, 10 May 2004 09:39 |
And LSDs are less safe than single spinners? Never heard that before... I suppose it makes sense though.
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Definately.
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 00:19
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what about in the rain though?.. even in my 1g geu the single spinner was bloody dangerous.. if it decided to drop from 2nd to 1st it ended at about 6000-7000 rpm and sent the tail all over the place
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Location:
Adelaide, SA
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 01:32
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Changing lanes when you change gears in the wet (or dry) is part of the fun with an LSD 
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I supported Toymods
On probation
Location:
Brisbane, Queensland
Registered:
January 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 01:37
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Yes but your car will be a manual and won't do silly automatic transmission things like dropping a gear and revving at 6000-7000 RPM
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Location:
Melbourne
Registered:
November 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 01:38
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Okay, fair enough Nark, but that doesn't help my car get into gear, and thats why I heel-toe while double clutching.
Worn Syncros I suppose.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 01:48
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if you rev match properly, you can change gears without using the clutch at all! (don't try this at home)
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Location:
Ballarat, Victoria
Registered:
March 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 03:28
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| draven wrote on Mon, 10 May 2004 11:48 |
if you rev match properly, you can change gears without using the clutch at all! (don't try this at home)
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can i try it at work?
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Location:
Melbourne
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 03:39
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When I had my MK2 with a 1JZGTE, i found the best way to get off the mark was the following :
1. With standard clutch - Ride clutch from around 3,000rpm
(no wheelspin, no damage to diff/box, but wears clutches out quickly)
2. With button clutch - dump the clutch at around 5,000rpm.. I still had wheelspin all through first and 2nd but it was a very quick launch (quicker than riding the clutch, off the mark on full boost ).. Note : I did blow my diff after a few months though. 
Best bet is to get ur car back and play around with it. Each car has its own 'sweet spot'.. Just have to figure it out
Cheers
Gaz
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 10:33
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without lsd it would be worse too...
so u mean just sorta depress the clutch while taking off to keep wheel spin under control
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Location:
Brisvegas
Registered:
June 2003
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Mon, 10 May 2004 23:07
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ive read them before.. id practise it.. or atleast try it.. but im still waiting for said manual car
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Location:
Melbourne
Registered:
November 2003
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Location:
Brisbane
Registered:
July 2002
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Location:
Perth
Registered:
October 2003
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Tue, 11 May 2004 04:40
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Man there is alot of room in that enginebay, can you swing some my way?
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Location:
Brisbane
Registered:
July 2002
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Re: Manual car Launching techniques(especially mk2 1jz people)
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Tue, 11 May 2004 04:46
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no.... its my room!
sending radiator and condensor off in next few days to them so they can fit cooler and such
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