vu ss m6 launchs rpm

[yellow ss]

what is a safe launch on a vu ss with 60k on it and i have the drag radials also i have air bag rears with revalved bilsteins for the drags and a stock clutch

[SSUte01]

what is a safe launch on a vu ss with 60k on it and i have the drag radials also i have air bag rears with revalved bilsteins for the drags and a stock clutch

I wouldn't go for the all out dump. My stockie has survived two drag days now without any slip (touch wood) but rather suffers from what I believe may me a stuffed slave cylinder as once it is heated and only needs to be a little bit pressure plate will not release and then I am missing the easiest of gear changes like 1-2 and 3-4.

Try slipping or 'driving' off the line just a little from about 3000. Depends who you ask, some say go the 6000 dump and 'she'll be right' A little trial and error is what's required and if you cannot afford a new clutch then always err on the side of caution but be prepared for the worst.

BTW - This is coming from the M6 driver who cannot better 1.9 60 footers so perhaps take it with a grain of salt.

Luke :)

[RedVYIISS]

George,

I've been up close and personal to a few of the M6 peddlers when they've been launching at WSID. Dave & Dale from CHE, and Erik (Lautray).

I'm guessing they all launch at 6000 odd rpm.... but none of them simply dump the clutch. Dave & Dale are more brutal than Erik, but they're also running slicks.

I guess it's called 'driving' and knowing what you're doing, and plenty of practice..... and that's coming from me... someone who's p!ss poor at getting an A4 off the line!!!

I doubt the std clutch would stand up to much of this treatment, however I've seen Erik launch (other peoples) cars with standard clutches, absolutely flog the owners times, and I'm guessing his launch technique doesn't change all that much.

[BOMI]

I drive an A4 so shouldnt say anything but I have driven a manual of all types since I was 7 years old.

IMHO I say a 3000 to 4000 launch should be ok.

This will start some discussion but try loading the clutch slightly and use your hand brake to hold the car, will take some practice but yeah thats another idea for you.

Once Erik (Lautray) gets back from his Melb tripp he will have some info for you.

Troy :)

[yellow ss]

i tried handing the handbrake up and 4000rpm launch but the best 60"was 2.0 i need a good start as i would like to get a 12 my best so far is a 13.0 but last time i only got 2 runs and now i have a 78mm tba

[10sec_rx7]

as Allan said

me and dave both were leaving at 6800rpm with our cam setups,

with the turbos i leave about 5000,

on the street radials you will find 5500 will be about right

[lautray]

Practice man. Stock clutch: you can go as high as you like, but don't expect to be able to hot-lap. I used to go for ~4000-4500 on stocker with a slip; good for high - mid 12's on re55's back in the day. Et Streets will provide much more grip, so you'll need to slip it a bit & don't let it bog down too much.

I have seen Dale launch... limiter launches... impressive :bow: .

[yellow ss]

the only thing i will need to do is practice with air preesure in the bags ill give 4500 a go and see how it holds up

[BOMI]

Youre welcome Yalla :whip: :)

[DaveHAT]

I'm probably the last person who should comment on how to get an M6 down the 1/4 but I will anyway. Forget the handbrake thing George you're just asking to overheat the clutch doing that.

My most successful launch on ETs was with 4500-5000rpm slip which netted 60ft of 1.80. As said, if the clutch is still the one from new, with 60000km on it, hotlapping will probably not be an option.

Flush the clutch reservior with fresh fluid before you go (suck it out with a syringe or similar) which should help to maximise the chances of as good of a launch as possible.


Cheers

[lautray]

As said, forget the handbrake thing... I think good in theory to load up drivetrain, but better to concentrate on getting the car away with feet, not worrying about extras like hands. I have tried... & failed. But that is just un-co me :headbang: .

[yellow ss]

thanks for all the replies ill give it a trial in the industrial estate over next week

[BlooHAT]

Interesting thread. actually good to see im not the only one who struggles to get things right at the drags.

Ive never bettered 2.1 60, even on drag radials. And ive found the more i think about it with handbrakes and what revs and so on, the worse i go. Ive found i just get out there, do what i do everyday, and try not to over think it. Once i become more natural at it, ill try the other things..

Getting the heat into the Drag radials is important too, when i didnt do it correctly, i ended up spinning them the whole 60' :toetap: (4500 dump Tex clutch)

Arr well all good fun

Dan

[SSUte01]

Interesting thread. actually good to see im not the only one who struggles to get things right at the drags.

Ive never bettered 2.1 60, even on drag radials. And ive found the more i think about it with handbrakes and what revs and so on, the worse i go. Ive found i just get out there, do what i do everyday, and try not to over think it. Once i become more natural at it, ill try the other things..

Getting the heat into the Drag radials is important too, when i didnt do it correctly, i ended up spinning them the whole 60' :toetap: (4500 dump Tex clutch)

Arr well all good fun

Dan

Ditto,

I thought I had the heated the tyres but spun them the entire 60' every single time bar one and got a 1.9x and netted a PB - Drag racing is all about the 60' and I suck at it at this stage, very frustrating to run 12.999 @ 115 of a 2.1 60' knowing you can do heaps better (dont get me wrong rapt with a 12 just know there is more to come) . Every other one was over 2 secs. I will trying 2nd gear burnouts from now on. A far more talented driver than me told me they are the go - so I will heed that advice.

P.S - Welcome to launch struggle town, population 2

Luke :)

[Quadcams]

I know I haven't driven a ls1 but driving a manual car at the strip has a basic few thing to consider.
The main factor is practice and to be good a launching a manual is lots of it. You and you only is your best teacher as every car is different, change things like diff gears, suspension, power levels etc will make you have to learn you car over again, people can tell you everything under the sun but when it comes to a couple of seconds to pull it all together most of what you have been told goes straight out the window, just have to learn the feel of "your" car your self.
So my advice is if you are using MT streets only a moderate burnout is needed (my best 60's have been achieved with minimal burnout), as soon as you see smoke they are to temp. When launching as others have said about revs maybe start a tad lower and work your way up in say 100rpm incriments to see where "your" cars tyre threshold is (rember it will vary from track to track and different days, taking track conditions in to consideration), then you will get a good approximate depending on conditions and start to achieve consistant runs (which is the hardest in a manual) then as some others have said you can load up the driveline (almost engaging the clutch on launch), now this is the hardest part and this is where you realy need to learn the feel, all I can say is too quick with the clutch it will bog but to quick with the throttle you will pull the revs up and wheelspin city, you need a happy medium.
So after all that practice, practice, pracice as manuals can and will do your head in at times and one more thing using the hand brake wasnt my thing but I do know of some other very good manual drivers that have had good results using it.
Put it this way driving a manual at the strip is like a drummer "arms and legs going everywhere" and rythm is the key.

[Atsetu]

I know I haven't driven a ls1 but driving a manual car at the strip has a basic few thing to consider.
The main factor is practice and to be good a launching a manual is lots of it. You and you only is your best teacher as every car is different, change things like diff gears, suspension, power levels etc will make you have to learn you car over again, people can tell you everything under the sun but when it comes to a couple of seconds to pull it all together most of what you have been told goes straight out the window, just have to learn the feel of "your" car your self.
So my advice is if you are using MT streets only a moderate burnout is needed (my best 60's have been achieved with minimal burnout), as soon as you see smoke they are to temp. When launching as others have said about revs maybe start a tad lower and work your way up in say 100rpm incriments to see where "your" cars tyre threshold is (rember it will vary from track to track and different days, taking track conditions in to consideration), then you will get a good approximate depending on conditions and start to achieve consistant runs (which is the hardest in a manual) then as some others have said you can load up the driveline (almost engaging the clutch on launch), now this is the hardest part and this is where you realy need to learn the feel, all I can say is too quick with the clutch it will bog but to quick with the throttle you will pull the revs up and wheelspin city, you need a happy medium.
So after all that practice, practice, pracice as manuals can and will do your head in at times and one more thing using the hand brake wasnt my thing but I do know of some other very good manual drivers that have had good results using it.
Put it this way driving a manual at the strip is like a drummer "arms and legs going everywhere" and rythm is the key.

Couldnt have put it better Wade. :bow: :)

Start off at say 2500 to 3000rpm until you get the feel for it. Work your way up in 500rpm increments. No need to pussy foot around. :stick:
Rememer the max tourqe on the LS1 is around 4k. Try keeping the rpm on or above that with a quick slip.

[Quadcams]

Ditto,

I thought I had the heated the tyres but spun them the entire 60' every single time bar one and got a 1.9x and netted a PB - Drag racing is all about the 60' and I suck at it at this stage, very frustrating to run 12.999 @ 115 of a 2.1 60' knowing you can do heaps better (dont get me wrong rapt with a 12 just know there is more to come) . Every other one was over 2 secs. I will trying 2nd gear burnouts from now on. A far more talented driver than me told me they are the go - so I will heed that advice.

P.S - Welcome to launch struggle town, population 2

Luke :)
Some days it doesnt matter how much heat you get into your tyres the track is crap, over time you will be able to guage what condidtions the track is in. Some days on MT streets I have spun all the way to half track other days you could just give it more and more rev with no spin.
At WSID for example on wednesday street meets alot of the time the track prep is not the best, even more so since the comp cars dont run on these nights but have noticed after big meets which have top fuel etc you can get a very good track on wednesdays (providing theres been no rain since the big meet) and normally on private meets they give the track a good prep to.
So in saying that your first pass of any night dont go all out as wheelspin straight off will make you get lost as to whats the best revs to launch on that particular night.
Bacically creat a system that works for you to be able to guage track conditions and best launch rpm for the night/day.

[RedVYIISS]

thanks for all the replies ill give it a trial in the industrial estate over next week

One thing to remember, the level of grip at the track can't be compared to the best road surface you'll find. The track is prepared with a compound that promotes adhesion/grip and it's nothing like a road surface.

[bluess57]

With clutch technique, I practice quick take offs @3000-3500rpm on street tyres and the aim being not to spin the wheels (best done on quite roads).
If your chasing a good ET at the strip, then 5000+rpm launch is required. Anything less and they bog down.

[lautray]

If your chasing a good ET at the strip, then 5000+rpm launch is required. Anything less and they bog down.
Yep, 5000 would be the absolute lower limit. I've got it all wrong from on occasion from 5500 & its gone down <3500rpm at clutch release... et's suffer relatively badly :headbang: .

[yellow ss]

One thing to remember, the level of grip at the track can't be compared to the best road surface you'll find. The track is prepared with a compound that promotes adhesion/grip and it's nothing like a road surface.

thats fine i was going to test tyre pressure and air bag pressure to get maximum width of the tyre on the road

[yellow ss]

it all paid off as i just ran a 12.8@108 with stock diff and stock clutch

[SSUte01]

That is some damned fine cog swaping IMO

Nice work - What 60 footer and what tyres did you use

[BOMI]

it all paid off as i just ran a 12.8@108 with stock diff and stock clutch


Good work mate :thumbs:

More info pleae, 60 ft etc :)


Troy :)

[veewhytu]

Thats a good effort, well done :)

[yellow ss]

60' 1.963
330' 5.430
660' 8.309
mph 84.37
1000' 10.780
et 12.874
mph 108.17

[RedVYIISS]

Well done George, it's a milestone changing that first number from a 13 to a 12. Good stuff.

Don't leave it a year though..... winter's on the way!... especially 24th June

See here!

http://www.trackchat.com.au/forum/showthread.php?t=743

[yellow ss]

Well done George, it's a milestone changing that first number from a 13 to a 12. Good stuff.

Don't leave it a year though..... winter's on the way!... especially 24th June

See here!

http://www.trackchat.com.au/forum/showthread.php?t=743

sorry cant as im pay off our wedding for next year pluss saving for a house at the same time but ill see how i go