Launching an I6 at the track

poolkeeper · 22-12-2007, 02:13 PM

Whats it like launching from the line?
Is it instant wheelspin if you have it stalled up?
Im getting a helmet after xmas and would like to have as much knowledge before I go to WSID.

My transmission guy said, I got maybe 8 months life left out of my auto, this was like 10 months ago, might aswell set a benchmark with the slowing dying auto hey.

stiddy · 22-12-2007, 02:25 PM

lol launching hmm... Put it in Nutral rev it up to around 4500rpm and click it to Drive when the light goes green.

StealthAu · 22-12-2007, 02:27 PM

Quote:

Originally Posted by stiddy

lol launching hmm... Put it in Nutral rev it up to around 4500rpm and click it to Drive when the light goes green.

This would probably give you the best launch, but I'm not sure if you'd make it down the remainding 350mtrs of the track.

poolkeeper · 22-12-2007, 02:36 PM

Quote:

Originally Posted by stockoau

This would probably give you the best launch, but I'm not sure if you'd make it down the remainding 350mtrs of the track.

that would be my guess to lol

FGII-XR6 · 23-12-2007, 12:01 PM

Quote:

Originally Posted by stiddy

lol launching hmm... Put it in Nutral rev it up to around 4500rpm and click it to Drive when the light goes green.

just like a drive train only crunchy

stiddy · 22-12-2007, 02:31 PM

LOL ahh ive done worse.. NA fairlane, 6200rpm D SLAM.. left the diff all over the road. haha

The Monty · 22-12-2007, 02:57 PM

No burnout, bit of PSI out of the tyres (I run about 28 in my 235/45 17's), Foot on the brake HARD, put your foot down till it nearly is breaking traction, on the last ORANGE light, let your foot off the brake and mash the accelerator.
I pulled a couple of 2.19's on a stock auto driveline using this technique (3.08's, no LSD, no stall).

3.9from hell · 22-12-2007, 03:12 PM

Quote:

Originally Posted by The Monty

No burnout, bit of PSI out of the tyres (I run about 28 in my 235/45 17's), Foot on the brake HARD, put your foot down till it nearly is breaking traction, on the last ORANGE light, let your foot off the brake and mash the accelerator.
I pulled a couple of 2.19's on a stock auto driveline using this technique (3.08's, no LSD, no stall).

yep thats the way, i can launch my el turbo this way, run low 13 with no wheelspin at all, can launch with 5psi on the guage and still hook up so u should hav no probs at all

helps to hav good rubber tho

best of luck

poolkeeper · 22-12-2007, 03:03 PM

does it hook up good, no pedalling the throttle ?
Ill be using my 45, 235, 17" kelly chargers

StealthAu · 22-12-2007, 03:03 PM

Yeah if your running street tyres you want them cold so no skids

EvilChief · 23-12-2007, 12:56 AM

Quote:

Originally Posted by stockoau

Yeah if your running street tyres you want them cold so no skids

what?

The Monty · 23-12-2007, 07:36 AM

Quote:

Originally Posted by EvilChief

what?

Street tyres dont like heat, they get hot, they loose there stickiness. On the street is different, you want them warm, but deffinately not hot.

EvilChief · 23-12-2007, 09:24 AM

Quote:

Originally Posted by The Monty

Street tyres dont like heat, they get hot, they loose there stickiness. On the street is different, you want them warm, but deffinately not hot.

interesting tyres you guys got there ...

i consistenytly run better times with warmed up "street" tyres and that is backed up by every vehicle (falcon, commodore, subaru, nissan) i have ever raced on the strip (and that has been a few over the years)

blackers10 · 22-12-2007, 03:13 PM

the track is about 1000x stickier than the road mate
my 2400 stall worked GREAT at the track..
on the street its all wheel spin LOL

poolkeeper · 22-12-2007, 03:17 PM

Quote:

Originally Posted by blackers10

the track is about 1000x stickier than the road mate
my 2400 stall worked GREAT at the track..
on the street its all wheel spin LOL

I thought it would be the other way around on street tyres.

ClassicAU · 22-12-2007, 04:05 PM

How about those of us with a third pedal? I have no idea how to launch my car properly yet. Its either bog down or sideways action! Whats the best technique for a manual I6?

Evan

atec77 · 22-12-2007, 04:11 PM

Quote:

Originally Posted by ClassicAU

How about those of us with a third pedal? I have no idea how to launch my car properly yet. Its either bog down or sideways action! Whats the best technique for a manual I6?

Evan

you need some practise . minimum spin and dont drop the clutch , modest revs and drive it away then work out from there what hooks up best .
couple of goes and you will realise sideways or spins are slow.

JC · 22-12-2007, 05:00 PM

Quote:

Originally Posted by ClassicAU

How about those of us with a third pedal? I have no idea how to launch my car properly yet. Its either bog down or sideways action! Whats the best technique for a manual I6?

Evan

Drop the clutch at about 2500 to 3000rpm, then feather the throttle to avoid wheelspin, then grab second - no clutch, off the throttle though. Then 3rd (will need clutch for that one), then fourth (no clutch).

ClassicAU · 22-12-2007, 06:03 PM

Quote:

Originally Posted by JC

Drop the clutch at about 2500 to 3000rpm, then feather the throttle to avoid wheelspin, then grab second - no clutch, off the throttle though. Then 3rd (will need clutch for that one), then fourth (no clutch).

No clutch?!? Wouldn't that just shatter the gearbox? Sounds pretty scary, I don't know if i am that game to get a good time!

Evan

Bobman · 22-12-2007, 05:22 PM

Doesn't all this special "preparation" kinda ruin the fun? It's like cheating.

Imagine if you had someone pull you back on an elastic rope and then let you go in a baton relay.

Nothing wrong with a normal launch.

schuldiner · 22-12-2007, 05:37 PM

Quote:

Originally Posted by Bobman

Doesn't all this special "preparation" kinda ruin the fun? It's like cheating.

Imagine if you had someone pull you back on an elastic rope and then let you go in a baton relay.

Nothing wrong with a normal launch.

how is it like cheating? is it cheating to come on the forums and ask for a diagnosis on a problem with your car? or should you just go in blind? little extra info can go a long way as i'm sure you know.

poolkeeper · 23-12-2007, 09:24 AM

Well at the moment, I have 2 techniques that Im going to try. Whether I get the same result on the track is a different story.

StealthAu · 23-12-2007, 10:00 AM

A few years back I was having the same argument, trying to tell some guys I worked with that your better off not pulling a skid, streets work better cold. After an hour of wasted words, I went out to a private road with them and gave them a demonstration of what I was talking about. Even after them seeing for themselves they continued to argue the point because rubber is rubber. Anyway, EvilChief, whatever works for you.

JC · 23-12-2007, 10:15 AM

Quote:

Originally Posted by stockoau

A few years back I was having the same argument, trying to tell some guys I worked with that your better off not pulling a skid, streets work better cold. After an hour of wasted words, I went out to a private road with them and gave them a demonstration of what I was talking about. Even after them seeing for themselves they continued to argue the point because rubber is rubber. Anyway, EvilChief, whatever works for you.

Track stickiness etc is totally different to what you call a "private road". Warm rubber and the drag strip go hand in had to provide a better launch. Warm rubber and the street go hand in had to provide better grip. Cold rubber is only useful in packets, and even then, it is only potentially useable - it actually gets better use wet and warm.

StealthAu · 23-12-2007, 10:24 AM

All I know is both on the strip (No not in a falcon) and private roads I have found I had better launches and less wheel spin if I didn't pull a skid first.

blackers10 · 23-12-2007, 12:11 PM

i figured that the burnout was to help bring up the heat ..

on the street your tyres are warm already due to driving for the last 1/2 hour or so etc etc

i think a burnout for at LEAST your 1st run is always good
coz its fun hehe

after that . do a coupla with and a couple without burnouts etc
see what you like best
its all fun.. thats what the strip is for

EvilChief · 23-12-2007, 12:44 PM

doing a burnout is not only there to warm up the tyres, it is also to clean the surface area (remove old rubber, grime, dust, water, oil etc)

I have been raing for 7 years and warm tyres have always worked better ;)

btw ever ran ur hand over a "hot" tyre vs a "cold" tyre ... see which one is stickier ;)

Grippy · 23-12-2007, 01:16 PM

Quote:

Originally Posted by EvilChief

doing a burnout is not only there to warm up the tyres, it is also to clean the surface area (remove old rubber, grime, dust, water, oil etc)

I have been raing for 7 years and warm tyres have always worked better ;)

btw ever ran ur hand over a "hot" tyre vs a "cold" tyre ... see which one is stickier ;)

Very true, especially when at Calder with the return road like goat country with loose gravel getting stuck to your tyres, its a good idea to do a little skid to get rid of the crap you pick up after every run.

The Monty · 23-12-2007, 01:04 PM

Thats fair enough. But every run Ive done with a burnout, is always slower then no burnout, its probably to do more with the different compounds in the tyres we all use, no two tyres will be the same.
Also though, do a burnout, and see how high you trans temp goes especially with the auto, and a hot gearbox aint gunna be good for your times.
In saying that though, everyone probably has a different technique, and I think for each persons own combo, you will need to try a few before you find the right one. No two combos will ever react the same way.

EvilChief · 23-12-2007, 01:25 PM

Quote:

Originally Posted by The Monty

Thats fair enough. But every run Ive done with a burnout, is always slower then no burnout, its probably to do more with the different compounds in the tyres we all use, no two tyres will be the same.
Also though, do a burnout, and see how high you trans temp goes especially with the auto, and a hot gearbox aint gunna be good for your times.
In saying that though, everyone probably has a different technique, and I think for each persons own combo, you will need to try a few before you find the right one. No two combos will ever react the same way.

correct ...

i never do a 5min burnbout (unlike some ppl i have seen) .. a quick squirt over the water with a quoick post run/launch.

also i am somtimes fortunate enough to run after a big dragster who just left a nice set of very stick tyres marks in front of me. also traction compound used around australia is different all together.

every car anbd every driver requirews a different technicque.

For example launching my Au vs my VP are two completely different hats. each will require a different launch rpm, diferent hook up, brake application etc etc

it all comes down to practice practice practice and more practice. it took me close to 6 months to have my launches optimized on my AU and that was being out there every week practicing.

once my new engine and transmission go into my car it will require a completely different technique once again.