Looking for opinions on solidifying my drivetrain for hard launches. The car isn't used primarily for drag racing, mostly road course, but it is going to see the odd hard launch.

Right now, I currently have the Banzai Racing diff brace, stock rebuilt Torsen differential in excellent condition, ASpec's solid transmission mount and solid engine mounting.

The car currently rolls on 275 Azeni RT615 in the back but I was considering throwing on a set of 255 ET Streets for cutting a solid 60'.

My question is: Will the stock differential casing hold up with this current setup or is it in my best interest to invest in the PFSupercars diff cradle.

I'm pretty sure the way its setup now, it will handle the launches on the street tires. Just need completely sure if I have anything to be worried about with the ET Streets.

The car is a 93 FD w/ GT35R @ 14 psi 425~ whp
Eibach springs/KYB Shocks for suspension upgrades

 

ive always hear that the axles were a weak point. Could go with some chromoly ones i think

 

Yeah, the axles are upgraded units. Found out the hard way that those are a weak point.

 

The ET streets will be easier on the drivetrain then street tires, reason street tires have stiff sidewalls and spin which then causes wheel hop the bouncig wheels shock the drivetrain and break diffs

The stock torsen (regardless of how new) is your weak point I broke 2! One on the stock twins! Im on a T2 clutch type diff with brace with stock axles and (so far, they are next) with more power then you current setup and so far its working

 

I have had good luck on the stock stuff myself. Never broke a part (except motors) in many years although it was not until recent I started cutting 1.6's (before 1.7 to 1.8's). But as said above the ET's will save you, better 60's and easier on tthe driveline. One thing I learned from Steve Kan years ago was to use the e-brake while sliping the clutch a tad while staging to get the slack out of the driveline. I have mad well over 150 passes like this.

 

So you are preloading and that seems to be working.

Excellent advice. I think I will stick it out with the setup I have then. If I start popping diffs, then I will reconsider.

Thanks for the help guys.

 

Yep , Im running Kaaz 1.5 clutch type Diff with ETs, I preload the drivetrain as well with the e-brake(handbrake) on stage, done over 40 passes with no axles breakage so far (1.6 -1.7 60fts)

 

Should have clarified I broke the diffs while wheel hoping on STREET tires, I havent broke anything on the ET streets

 

That e-brake trick is interesting, so do you let down the ebrake when you start letting out the clutch and going full throttle when launching? Maybe I'll try that. But I also wanted to add that I also have done like a hundred passes on the stock diff. and axles with Hoosier drag radials, and just recently got ET Streets and a diff. brace, and have never broken anything. 1.57 - 1.65 avg 60 ft times.