Any tips or suggestions to help in getting all this power to the pavement? At only 13-14 psi this thing lights up the tires quite easily with the massive instant torque. No point in upping the boost until I figure out how to launch this thing. I want to be prepared when the local track re-opens next spring.

Looking for any sugestions from tires to technique. Keep in mind that this is a 5-link rear setup and AVs are close to 50/50 weight distribution, although I have added a couple hundred pounds up front and lost the spare. 4WD launches do not appear to be an option if the idea is to travel in a straight line.

 

Bump for ya! Your gonna need some answers here pretty soon since spring is right around the corner, or already here basically.

 

At a fraction of the power you make (~625rwhp with the nitrous) I don't know how much help I can offer. My suspension is stock other than lowered with shackles and hangers in the rear, spindles up front and front end suspension limiters to keep the weight over the front as much as possible with 4wd launching.
On street tires (285/60/17) and ~25psi in all 4 tires I barely can keep them planted. You might need some form of electronic assistance to limit spark or ? Trial and error will get it right, let's see what that big AV can do!

 

Drag radials all four corners and pinning down the front end (suspension limiting) 4wd or nothing

 

What gears are in it. I gained tons of traction by going from 4.10 to 3.73 and I am planning 3.42s for it. Havent had a successful launch at the track but I can footbrake 8 lbs of boost with the gear swap. Will not hook at the level but with practice I may be able to launch at 5-6lbs. I made the truck way more fun on the streets.

 

only problem with drag radials is you have to get them warm to really help . so going through the water box and doing a launch in it is what must happen . here they sometimes get mad if you over the start line as it can trickle water on to the track which isnt safe.

for the 5 link setup i would look into swapping to coli overs with better adjustability. planting the rear wheels is going to help a ton along with having enough travel in the front to not pull the wheels up and spin them. this is where you need to find the fine line of hooking in the rear but not squating so bad it will pull the front wheels making them spin. its going to take a lot of fine tuning but radials on all four is going to be a great start.

depending on what you have for options what is the smallest rim size you can fit ?

what gears do you have ?

 

I agree with Chase, as I went through similar issues. I’ve gotten chastised pretty heavily for doing a 4-wheel burn-out before, which I felt was the tracks own fault due to forcing everyone through the water box instead of having room to drive around it. Water is great for slicks if you can heat them up, but not worth a damn for street tires where you end up tracking it straight to the starting line. In lieu in coil-overs in the rear, you may be able to get away with air-bagging the rear coils.

 

Thanks for the suggestions.

3:73 gears.

I haven't done the brakes yet, so whatever wheels will fit with the stock 13" Av disks. Not sure how much brake I will need to stop this battle tank at the end of a track run though!

Torque steer is a little wild on 4WD launches. Also afraid that too much traction on the front might snap something as the front axle is still stock.

 

thats the thing , the 1/2 ton front axle is weak and there isnt anything to make it stronger.

i just lifted my 1 ton truck and the front axle in it is beefy . i think it would be possible to get it into a 1/2 tone with some work . we can then have custom cv axle's made and should be good to go . they have e locker's available for them that would be awesome for hard launching.

with the 13 inch rotors 16 are about all your going to clear . so with the 3.73 gear you would want around a 28 inch tire at most so you can get going pretty hard and still trap a decent mph. id stick to either a mickey thompson or a m+h drag radial tire. they are much softer than the nitto's .

before doing any suspension work i would try the radials . do a nice 4wd burnout in some water and see how they work .

one thing that is mandatory though , VIDEO!!!!!

 

I had a lifted 90's 2500HD Sub with the 1 ton drivetrain. Much more stout...... and heavier. I waited years for that e-locker to come out and ended up selling the truck before it ever did.

I have heard that a partial frame transplant is required to bolt up the HD front axle to a 1500 truck.

More video to come when it is up and running.

I am re-arranging the TBs. 1 in front and 1 off the top - may use a low profile Edelbrock elbow and hang it off one side to get the height down a little. So much for symmetry........