kcfan

iTrader: (5)

2002 Z28 A4 here. What should be a good safe rear end HP limit be for street tires and no drag racing, etc?

Thanks!

kcfan

iTrader: (5)

2002 Z28 A4 here. What should be a good safe rear end HP limit be for street tires and no drag racing, etc?

Thanks!

kcfan

iTrader: (5)

2002 Z28 A4 here. What should be a good safe rear end HP limit be for street tires and no drag racing, etc?

Thanks!

MrDude_1

iTrader: (4)

less then the car makes stock... lol.

really, theres no telling. agressive street driving with street tires has been known to break some...

the more traction you have(read:use) and the more brutaly its applied (power slammed on) the more likely it is to break.

but there is no safe limit for agressive driving of any nature...

FelixIlka

You could snap it with stock hp.

Phate

iTrader: (2)

The safe limit on the junk 10 bolt is 0 hp/0 tq...anything above that is likely to induce failure...LOL.

Seriously though, a lot of guys have good luck with autos and 10 bolts as long as they don't hook too violently. If you are not going to be putting tire on the car you should be ok for quite a while, especially if your gearing is 3.23...they tend to be a little stronger.

Lithium

iTrader: (47)

RedCamaroZSS

400... sticky tires are the enemy of the 10-bolt.... Once you put something sticky back there, you're on borrowed time.

mimic42100

That would be some awesome info. I've been wondering the same thing =)

SSPEEDY

iTrader: (4)

Even with stock HP numbers, the 4l60e can take a dump. My suggestion is change the fluid frequently, get a trans cooler and never run more than 2 passes at the track back to back. Take a good 20 minutes in between if you run more than two in a row. When my trans finally went (at 55K miles, started slipping), I had done 4 passes in a row at the track that same day. On the way home, I noticed I was hitting the rev limiter in between shifts My converter went in at 32K miles and my cam/headers at 40K, so I'd say most of the harder miles were during that time. Many low 12 second track passes and a lot of WOT street/highway runs. I'd say it did pretty good.

382WS6

All I did was add a lid, ported MAF, TB, and an exhaust and I broke the stock posi. Never had a problem with the A4, not even after I swapped in the stroker motor (although I'm sure I should step up to something stronger). As for the rearend, I dropped in one of those SLP Zexel units.... very nice.

LoPeY

iTrader: (6)

Possibly...but on street tires, that risk is pretty low especially with an auto. There are people in the 10's on slicks that are still running the stock rear with no problems. It's one of those things that is hit or miss.

777

iTrader: (21)

there are auto's in the 10's but don't expect to be a m6 and be in the 11's...there isn't an hp that break's the rear...it is the shock that the rear takes...ie..you can have 600rwhp and not break the rear during a run...(launching soft, like off idle) and you can have 350rwhp and break the rear launching at 5500rpms...that's why auto car's rear end's last longer or with more power...it isn't as violent...

deetsnai

i think u missed the point of his question...."not drag racing"...the stock rearend is perfectly fine on the car for normal driving, and even roll racing with full bolt ons.

its when u shock the rearend with 300 rwhp instantly at a dead stop and have excellent traction, thats when ur rearend eats ****

cablebandit

iTrader: (37)

wheel hop killed my only failure so far...during the burnout.

Tiago

iTrader: (27)

mine is still living, gone to the track some, it takes severe street abuse , I daily drive it

tump

I broke mine with a lid and TB bypass.

SmokingWS6

iTrader: (1)

be carefull with the ported maf, if you don't make maf table corrections your trans life can suffer due to the maf reporting to light of a load to the trans.


Back to back track runs should be ok as long as you have a way to monitor trans temps I wired up a fan switch, I keep them running from the time i cross the traps till after my burnout if i'm going back to back. It'll help to pull air through the trans cooler. If your stock though you really should wait 20-30 mins between runs, it can get quite hot w/no cooler or lowered fan temps, same goes for the motor.

SprayJ

iTrader: (17)

Well I am one of the lucky ones for sure, have made 505 rwhp and 512 rwtq and went 10.75 with a 1.50 sixty foot numerous times and so far, no problems. But with these rearends, it's all borrowed time.

2001WS6Vert

As long as you don't try to force it to hook you should be fine regardless of how much power you have (just like spinning the tires in the rain). If you run E.T. streets or such and really try to get low 60' times with suspension mods and high RPM launches, beware.