Is 410 rwhp gonna turn anything into an unrecongnizable part? I know with a good tune our motors are reliably safe up til about 450 rwhp. Can our driveline reliably handle this power? What's the weakest link? 410 rwhp is about 480 flywheel. That's adding about 200 more horespower over stock. Anyone breaking anything?

Respect
JET

 

Well ive heard that its no problem with a good tune and it all depends on the driver if you beat it up its going to go sooner then intended but if you drive normal and you do your pulls normally then it should last you long time.

 

Well i was at my tuners shop the other day and I saw his old drive shaft out of his '04 roadster. I didn't know those shafts were hollow!! It was torn in two pieces. His is APS'd TT, 500 rwhp.

 

We constantly are running 400+ish and 500+ whp on our cars. We have never (knock on wood) had a drivetrain failure, or realy any failure.

 

And you guys abuse them like rental cars around the track too.... and no driveline failures?

Respect
JET

 

We sure do abuse them........BTW, I like that rental car analogy.

The one and only failure was when driver "A" (who shall remain nameless) miss-shifted at California Speedway at like 120+ in 4th gear and meant to go to 5th but went to 3rd instead (on accident of course) "still wide open" (power shifting). Needless to say, we lost 3rd gear in THAT tranny that day.

Other than that........No drive train problems related to added power applications.

 

I think torque #'s play a big role in engine/driveline failures. I could be wrong though.

 

you are lucky that your engine didnt fail.

 

Thats one HELL of a mess up! I went from third to second and i thought i killed my baby.

 

hmm I agree, 120mph+ into third while power shifting when 3rd tops out around 90, that should have over revved like there was no tomorrow. Maybe an exageration.

 

I did the same i thought she was gone, just about shat myself...

 

No exaggeration......and over-rev was an under statement. He (accidentally) went to third instead of fifth (power shifting, not lifting) , from the top of the fourth gear revs (what ever that speed is) The motor did over-rev and get hot, yet luckily was ok. We assumed it hurt or broke something else (besides third gear) But when we checked everything at home everything was fine. A great attest to these motors when they are built, and how we build them...I guess.

 

A couple of years ago when the FI world was new to the Z I always heard of head gaskets going. Thats about it besides the usualy stock drivetrain parts clutch and brakes if none brembo..

 

Yet another reason to stick to a 5AT...

 

no one can be a fortune teller - you can have the best tune in the world and something still can let go.

The best insurance when going to this power level is having money in reserve when and if something DOES go wrong. Plan on something happening, so that if it does, you are prepared, and if it doesn't, you are pleasantly surprised

 

Hey Larry, at 400'ish whp, the weakest links will be the stock clutch (Which you have already upgraded), and axles, but only if you drag race with DR's. Several of my customers have broken axles at the track at around 390-425whp. But if you are driving the car on the road or road course, stock axles should be suitable.

 

The differential is another weak link if you do continuous drag racing. Mine is starting to howl when I let off on the freeway. I also broke the mount that has a seal on it so some fluid came out. But its still fine.

 

They usually say the drivetrain endures more torque in 1st gear from the stock engine than almost any turbo can produce in 2nd gear. Take that for what it's worth..

 

barthelb- what do you mean when you say the differential "howls" when you let off? Sometimes i hear a quiet sound when i let off, but im hoping its not the same thing youre talking about. is it a serious problem even if it is? it only happens sometimes...

 

The weak link is your tuning. If it's not on the money your motor is living on borrowed time.