sebastian944

I have a question. The Turbo S model has 1st and 2nd gear strengthened because of the added horsepower. If you change your car to a K27-6 turbo and chips on a standard 86' 951. Would the original gears in the tranny handle that extra power?

dillon410021

I would say It should handle almost 400 hp unless you are "redline" launching it on a soild trans mount which could do some damage

aussiebj

I have a non LSD in my 87 track car and im making around 325rwhp and have not yet had a problem ..then again i do no abuse the rear end.....

jasonlp

s2 also has 1st and 2nd strengthened

Darwantae951

Didn't know that.

I've seen over 500whp go thru turbo S transmissions with no problem (3L big turbo engines). I don't know if Special Tool used an S gearbox or not for his 600hp runs. I've seen several high HP 86/87/88 cars that have not had gearbox issues.

Airflite40

I thought special tool used an S2 gearbox??

Van

It's a moot point what special tool used... the dyno pulls would have been in a gear higher than 1st or 2nd. And, if I recall, he used a launch control in the low gears - which would have prevented the gears from seeing full HP.

Darwantae951

Good point! Sorry for my stupidity. I completely didn't think of that.

Good point also that first and second are almost useless when you start modifying these cars.

Van

I'm speculating here, but I bet Porsche knew some owners of the higher-zoot turbos would be tempted to do some power launches...

Kind of like why the new GT2 has a launch control button?

Darwantae951

I'd be afraid of voiding my warranty...

dand86951

Ran that combo for several years on the 86 trans and at 82,000 miles it still shifted flawlessly.

sebastian944

That's funny. I have the exact same miles too.