If you go higher than that, it's better to be ready for a new tranny sooner than later
but of course I know it's just a matter of time. 
max hp for a stock A4?
Thread Starter
Pro
Joined: Dec 2009
Posts: 647
Likes: 0
From: Oradell New Jersey
max hp for a stock A4?
looking to do some mods this winter, cam and long tubes, wondering how much the stock A4 can handle, car isnt raced often, maybe once a year and has 82k on it
Le Mans Master
Joined: May 2006
Posts: 7,896
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From: Hillsboro OR
Melting Slicks
Joined: Feb 2007
Posts: 3,194
Likes: 10
From: New Smyrna Beach Florida
I've been running in the 420 rwhp range with a high stall for a good while. It does help to have a tranny cooler if your running a stall. Based on what I had read, I thought mine would bite the dust in no time. Surprisingly it has hung in there through quite a few 1/4 mile runs. Its been thrown around that 400ft-lbs torque is the limit, but the 490 rwhp post is encouraging.
Le Mans Master
Joined: Feb 2007
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From: Oviedo Florida
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I ran 3 years with 550rwhp and 500 torq before replaceing the
tranny. You also will need to replace your driveshaft couplers.
Mine lasted 3 years.
tranny. You also will need to replace your driveshaft couplers.
Mine lasted 3 years.
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
A4 is weak.. 320rwhp on my 99 38k miles and it was fried.. Talk to Rodney at RPM.. He will hook you up.. Heat is the killer... Anything over 210 degrees is not good.. Do a couple of hard runs on the highway and see what your tranny temp is... It does not take much to heat up fast... A tranny cooler will help for awhile. RPM Transmissions has made a fortune on Forum members with the A4 transmissions.. Its the weak link in the C5.. A lot of folks claim big numbers on their A4, but you have to remember most of these cars have had several owners and have probably already had an upgraded rebuild somewhere down the line, and the current owners are unaware
Last edited by David426; Oct 18, 2010 at 09:31 PM.
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