m73m95

Just that.... how much HP and TQ do you think the 944 chassis/tub can withstand on a regular basis without twisting, cracking or bending?

I have seen some of you turbo guys up in the 500 hp range, and Tony G's LS1 is in the high 400's with monster V8 torque. Has anyone seen their chassis twisting or subframes cracking?

xsboost90

i dunno but my glove box kept popping open on the track during the fest- may be time for a full cage.

m73m95

Haha, thats what I'm looking for.

My future plan is a 550hp 500ftlb LS2. I want to put in a roll bar with some legs running front and back for added support, but still....

How long before I have a 944 pretzel?

Swagger93

There are members with cars up to 600hp on the Porsche turbo motor. I think you're fine with those figures.

xsboost90

yeah but street/dyno is different on a car than track/strip.

Swagger93

There's just a big a difference between track and strip.

Chris White

are you talking about absolute preformance or long term stress cracks?
When it comes to absolute chassis performance its not really about HP but about cornering forces.

m73m95

I'm asking because I want to be able to put another 100k miles on my car with 550 chp. My estimate is probably high, but I want to be sure. (I'm looking at around 450-475 wheel hp).

Its mostly a street car, but will see more than a few track days.

Turbo 600hp is different than V8 600hp. The v8 has much more torque, and makes power right now. A turbo builds power more smoothly...... in general.

JimV8

It really is the wrong chassis for huge power. Aside from the unibody flexing you are still dealing with a semi trailing arm rear suspension, essentially the same as on the Vanagon. If you are going for the really big power you might want to look at the 928 platform. It is a much better starting point.

Chris White

The transaxle will let go before the chassis.

ShApE

ban!

DanR

The application will dictate some of the answer. If you are running 600hp or whatever in street tire you have to worry much less than if you are at the strip on sticky slicks doing 5k launches or at the track cornering hard.

V2Rocket

the 944 body seems to be very stiff from my experience.

pm special tool and ask how often he drives his 600rwhp 951

gt37vgt

as chris said if you drive hard there is more cornering load than power load .
the ransaxle will give out befor the chasis i don't think its a matter of chasis hanging together but if seems that beyond 500hp the standard trailing arm set up is a little inadequite
..
I would think development of a 944 would go sort of in this order
develop power up to 450hp then try to shed heaps of weight replace the rear sub frame then go for a stronger trans axle then go power crazy again

Lorax

944's are stiff compared to other cars people put massive power through (like 240's)