4wd boost launch

[AubleAK]

hey guys. raced my buddy the other night, hes got an lb7 with the edge juice/attitude. ive got efi live, stock everything else. went first one to 70 (trans will limp easily).

anyway, we each did 4wd boost launches. on take off, mine jumped all over the place! i dont know if this is normal, just felt very violent and aggresive.

is everything alright or does something need fixed?

 

[LBZrcks]

Are your torsion bars cranked? You probably also just launched a little too hard.

 

[AubleAK]

Are your torsion bars cranked? You probably also just launched a little too hard.

ive got a leveling kit... but they new keys are just sitting on the shims on the crossmember. i could take the bolts that turn the keys up and it wouldnt change it at all. boosted at 12 psi im pretty sure.

 

[TheBac]

Leveling kits and boosted launches usually dont go together.

 

[fctry286]

you will need to get some tie rod sleeves and braces at the least.

 

[cafryer]

you will need to get some tie rod sleeves and braces at the least.

x2

 

[Relentlesscummins]

How much boost were you building? What was tire psi etc. The dmaxs tend to hop around went set up stock and luanched hard. The leveling kit also tends to make it worse.

If you plan on doing this more I would consider lowering some and getting minimum tie rod sleeves. And braces as well. Also you can lower tire pressure to help if you grab.

 

[Texas Chevy]

When I run a four wheel drive launch the steering wheel would use to practically jump out of my had rockin from side to side. Threw some sleeves and a cognitive braces on it didn't do it as bad. Turned the leveling kit down it runs straight but I can still hear the tires squealing and have been told they point in pretty bad.

 

[ChevyTruck]

You could put chains on the lower control arm. I have a few friends that have them on their 1500 truck trapping low 12's on 33's.

 

[AubleAK]

Yeah i know about the braces, that definetly needs to be done. Just havent gotten around to doing it. Usually dont do launches, but my buddy wanted to race. Chains on
The lower arm? Just like wrap
Them around each arm?

 

[THEREDDEVIL]

Listen to Tom, leveling kits put your front end angles out of whack. Leveling kits+heavy throttle in 4wd=bad news. Alot of people don't realize that when u do a boosted 4wd launch the front end raises a little causing even worse angles. Ask me how I know

 

[TheBac]

Id also explore using a straight centerlink. That might work better than braces if you want to keep the leveling kit on.

 

[ChevyTruck]

Yeah i know about the braces, that definetly needs to be done. Just havent gotten around to doing it. Usually dont do launches, but my buddy wanted to race. Chains on
The lower arm? Just like wrap
Them around each arm?

http://www.performancetrucks.net/forums/show-shine-discussion-129/snapped-few-pics-today-460995/

I am still looking for the thread that it was in.

 

[AubleAK]

http://www.performancetrucks.net/forums/show-shine-discussion-129/snapped-few-pics-today-460995/

I am still looking for the thread that it was in.

what braces do i need to do this to my truck? and where can i find these?

 

[jonathancasey19]

This is what happened to me with a leveling kit and 4wd launch.

 

[AubleAK]

This is what happened to me with a leveling kit and 4wd launch.

I know that these kits really arnt very good for the trucks, but i picked up these tires for 250 bucks, nearly new. To make em fit i needed the leveling kit, cuz there 33s.

 

[AubleAK]

This is what happened to me with a leveling kit and 4wd launch.

How much did you have the keys cranked up?

 

[zeke38]

Ive got a leveling kit and a straight centerlink and it helped a bit but make sure your idler and pitman arm are good. They can cause some wild hopping too

Sent from my SPH-D700 using Tapatalk

 

[AubleAK]

Ive got a leveling kit and a straight centerlink and it helped a bit but make sure your idler and pitman arm are good. They can cause some wild hopping too

Sent from my SPH-D700 using Tapatalk

Where can i get those fairly cheap? Nothing on my front end seems "firm". All needs to be done, may need to put my trans on hold again for awhile.

 

[jonathancasey19]

They were cranked about halfway. That damage was from my own ignorance and stupidity a few years ago. It's plain and simple. Don't do 4wd launches unless your cv angles are flat. With "green keys" this can never be achieved even if you reinforce the entire front end. All those bolt on parts are bandaids. The geometry of the front end will still suck. Your solution to clearing larger tires is to bite the bullet and install a real lift kit like the Cognito 4-6.