Well i got my new kraftwerks kit installed on my ap1 it made 430whp and 255lbs, made it a week (about 200 miles) and i blew my diff apart last night already. I went with a supercharger hoping it would be a little easier on the drive train, i guess i was wrong!

 

Were you launching the car often?

Time for a Puddy Diff

 

Ap1 diffs are weak. Ap2 are better, by alleviating the first weak link, which is the main bearing end cap thickness. These end caps flex over time/stress, pulling the ring and pinion out of alignment, and this causing the first failure point of broken ring or pinion gear. Ive been through 2 ap1 diffs but never an ap2 yet. There is a basic end cap modification that was done in the early days, stacking another cap over the existing stock one for added reinforcement. I know this could be had through comptech back in the day and 1 or 2 other company's if i recall, but not sure who is doing them anymore. Puddy Dad will build you a diff to various stages depending on how much money you want to spend, but none of them are cheap. I always just pick up used stuff because I could never afford or justify 4x the cost of a low mile used OEM option vs building something stronger.

 

I think the driver caused this one.

 

I launched it quite a few times when the car was N/A and i think putting power to it was the last straw, it just suprised me it broke so fast. I have a ap2 diff i am putting in it today so hopefully that will make it untill i can get a puddy mod built for it.

 

i have the same opinion honestly. Not worth spending $2-$4k when that can potentially buy me 4-8 diffs. I never blew a diff went i was supercharged before and i drove the car hard both on the street and track/auto-x. As long as you don't launch and drive "smooth" the diff will be fine.

 

This a 38-92 blower.. how much more power does this make compared to 91..
oh, what fuel did you use..
I think your the only running a kraftwerks with a 92..

 

He states his power in opening 430whp which is about right for pump piss. The 92 does not appear to make anymore power than the 91

 

If im not mistaken an AP1 that wants to run an AP2 differential, need to change flange for the driveshaft? or do you simply swap flanges from AP1, to the AP2 Diff?

 

was this Ryan's (Moddicition) kit that he never installed? nice pick up