Hey Grip,


How do those 20s hook?

I am gonna buy some Centerline 20s here in the next couple months and although I have 4wd, I don't run it 24/7 and I was wondering how well it would hook at 35mph when I hit full boost. Right now I start to spin in 2wd.

 

Hmmm, They grip very good, but not quite good enough with a truck that has virtually no squat to it on a dead launch.

At 30, it should be much better........how much torque are you putting to the ground at that speed/rpm?

 

I'm not sure but since I am around the 4500rpm area I would guess over 500rwtq easy. It feels like I hit the switch on a 200shot when boost comes in fully. Sometimes if I race from a light without brake boosting I will get across the intersection just fine then BAM hit 13psi and the tires light up and it kicks sideways for a sec or if it's cold out it spins for awhile. I'm just running the crappy stock Firestones on stock 16" wheels though. I figured the 20s with good tires will eaither hook better (better compound) or it'll be a wash because the 16s have more sidewall. LOL

I know you make a ton of TQ so that's why I asked.

 

at 30mph's it would probably be ok in a straight line, if you factor coming out of a turn into the equation, at 30 mph's, they will break traction but not spin, al'a last night
I think your TQ hit's a little more sudden than mine, and you are slightly more suseptable to the wheel spin.

 

How well does the 4x4 system handle all that power? Is there somethign that's gonna wear out or grenade under all that power? Whats the weak link? Parish have you blown anything up or is your 4wd system beefed up?

 

Both differentials are weak. With stock tires the stock differentials actually stand a chance of surviving because the tires will break traction before the driveline can load up with enough torque to break stuff. If you put sticky tires onto your 4x4, let's say four drag radials for example, on launch there will be enough weight transfer and traction in the back to overstress the rear. With the extra traction in the back the front end will be to light to get traction from the front wheels no matter what kind of tire is on them, the the back will see all the torque. It comes back to 4x4 vs. 2WD for drag racing vs. a sleeper street truck.

 

I think my rearend is plenty strong, could be wrong though.

 

Is 300rwhp enough power to break any of that stuff? It seems you guys are running signifigantly more power than that.

 

You have a 2500HD, so it is either a 11.5" full-float (Duramax / 8.1) or probably 10.5" with a 6.0L. I have never heard of an 11.5" breaking. I know of Duramaxes making over 1200ft/lbs at the crank that have not broken those.

We're really talking about K1500 8.6" rear and 8.2" front differentials and axles. The HD stuff is what we upgrade TO.

 

I have the 10.5" FF