showoff

i know most people who use et streets have a turbo2 diff or a kaaz etc etc, but i also know some people use the stock diff for a short while, so my question how do i avoid breaking my diff while launching on et streets.... do i drop the pressure in the tire even more so absorbs more of the shock? attempt to slip out my 6puck clutch?? if any1 has any pointers lemme know i have a turbo2 diff in my backyard but iam not ready finicially 2 put it in the way i want with gears etc...

-dj

ErnieT

iTrader: (2)

The only thing that will break your stock diff is wheel hop (and over 600rwhp) and you won't get it with et streets. Keep them at around 15lbs of air and go have fun!

mattmaclennan

got to dissagree with you Ernie, launching like a nutter will crack your diff casing with as little as 350rwhp. I've seen several diffs spat out of 3rd Gens at the strip. Without a diff brace, launch kit etc, you can trash a stock diff if you try hard enough. Like Ernie said though, wheel hop is the killer, not torque. Progressive power delivery and well supported diff makes for happy days

showoff

yea i heard as long as you keep the psi low around 12-15psi your fine as long you dont get wheel hop..

pluto

actually, more tire pressure will keep you from breaking it. That way, it'll allow the tire to slip a little before getting full traction. less tire pressure will hook and launch forward w/o any slip. you really just have to play around the tire pressure to get your ideal launch. Me personally, I preload the drivetrain so that it doesn't get the shock before launch.

LT-x7

Where would one obtain more info on this launch kit? Is it for FD's only?

showoff

ive heard of people using the ebrake to pre-load the drivetrain is this the method you use?

-dj

crispeed

That's one method. You can also use a linelock.

1wide7

iTrader: (1)

i ran et streets at 17 psi with the stock diff launching around 4.5 -5k and it didnt break anythig

showoff

what were your 60's like with only a 5k drop? i see most people either launch around 7-8k or they bog with et streets

-dj

pluto

Yep. With anti-lag and N2O, i get low 1.40's 60' time launching at 6krpm. Less broken parts when launching at lower rpm.

andrewb70

On an FD? FC? ???

Andrew

Dan Schechter

He is absolutely right! Don't lower your tire pressure to save drivetrain parts, it's the exact opposite. You need to run at least 16psi, if not more! I cracked my stock diff with 350whp in my red car. The worm gears in the stock diff expand on launch and splits your case into 4-5 parts, trust me......I've been there, and getting another case could be costly. Raising tire pressure will give you more tire slip off the line, and preloading like some of the guys are talking about is also a great idea. You want your tires to slip off the line because if you have a six-puck, your clutch won't be doing any slipping, and something's got to slip. Also, do a small burnout, and not a large one. You don't want to get the tires too hot. Mickey Thompson recomends a little bit of smoke, and thats it. Those big-smokin' burnouts are great for show, but will only lead to broken drivetrain parts, and actually not work as well according to M/T. Good luck !

showoff

thanx dan, ill start the tires out at 20psi and work my way down but not lower then 16psi.. 1last question about pre-loading the drivetrain...(ebrake method) basically i pull up the ebrake,put the car in gear, rev-up 2 set rpm, and begin to slip out the clutch a little until i feel the car squat a little, and then when it time 2 launch just drop the ebrake and clutch????(pluto, dan) need your input since you use these methods

-dj

LUPE

or get a linelock, that's what the pro's use

showoff

ive been looking into 1 and will probably get 1 next week unfortantly the race is this weekend so i need 2 get a feel for the ebrake method for now

LUPE

Yeah, a linelock is the professional way to load up/pre-stage. The best method is using a pressure gauge and find the right pressure to pre-stage with. A few feet before the beam, press your brake down around half way and hit the linelock. This will lock up the brakes just enough that your tires will move but will keep the car underload......

make any sense?

I couldn't imagine using a e-brake........... so much is going on plus having to remember to drop the e-brake

showoff

yea linelock is the way to go.. and the e-brake method seems a lil involved for a person with only 2hands lol.. thats why iam waiting on pluto and dan to chime in.. but for this weekend atleast thats my only option

-dj

pluto

I sometimes use the e-brake but I usually just let the first person stage before I stage so that I can slowly creep the car to the 2nd light while it is still moving forward and by the time it is ready to launch, i'm already pre loading the drivetrain and clutch pre-engaged.

LUPE

man, I hate being the last one to stage.......... I always feel rushed.

Nuvolari

iTrader: (4)

Hell, I like to stage first and get it over with fast. Once the stage light goes on I finally can stop looking at my water and air temps.

Whats the time limit for the other guy if you pre stage and stage and they havent ?

PDViper77

iTrader: (9)

Don't know but I also like to stage first so I don't feel rushed...........

AZ'sFastFD3S

I have been launchin my car for 2 years on the stocker, it finally let go at the track last week. I usually slip the clutch a little at about 6k or so and get 1.7 1.8 60's. I wanted a better 60 so I dropped it at 6 or 7 and crunch....................