Petza914

Great. Now I can look at more upgrades

Carl Fausett

I respectfully disagree. This is not a monocoque car, and the engine and the transmission are not intended to be structural members. 928s, even with the coupe in place, flex so much the WSM discusses it in several places. Like not jacking the car before an alignment, and never lifting the car with the engine cross bar not installed. Like all convertibles, they are not as stiff as their hardtop cousins, and flex even more.

Increase the torque enough, and the engine and TTube will wind up some upon launch. It will apply torque to the frame through the motor mounts, just like all the other cars out there that are front engine and rear wheel drive. Only a convertible does not have the A, B, and C pillars of a coupe to help prevent the body/frame from twisting.

Ridiculous photos of frame twist on launch added for effect I know these two pics are not of torque-tube cars, but believe me, they twist just the same. Maybe less, but just the same. When my 928 racer was running 900 HP, I could watch my shifter move to the right as I throttled on, and come back when I left off the throttle. And that car has a 8 point roll cage! Lots of torque and big Hoosier slicks.

Catorce

Ah, the slippery slope of more power......where does it end?


Never, actually.

Carl Fausett

*clenched fist shaken at the sky* *heavy bad french accent* NEVER!

Bulvot

The pursuit of more power ends when you can leave two black stripes from the last corner's exit to the next corner's entrance.

Right now, I'm leaning heavily toward Carl's stage 3 kit. I'll explore all of the other options to make sure that there are no regrets or doubts on my part, but that's my inclination right now. I'll give the other recommendations a call to see where those lead.

I also really like the idea of doing the corvette transaxle swap. I think that I'll wait a bit to see how things go with just the supercharger first.

Like others, I've found Carl to be very responsive to inquiries. That's a big factor for me.

Thanks again for everyone's input. It's very helpful. And that 928 Cabriolet....you really can't top that! Very nice work to bring that up to snuff.

Catorce

Pun of the day, give the man a prize.

olmann

FredR

Carl Fausett

That definition is incomplete, isn't it Fred? It leaves out stressed members, like when the Hewland becomes part of the rear structure of the race car.

Carl Fausett

Here is a nice video of the Stage III kit that allows you to see and hear it driven. Breaking the tires free in 1st and 2nd gear with nothing but throttle is a given.

On this car, my tired 928 GT with 216,000 miles on it, we got 607 HP at the motor. Your results may be better.

Bulvot

Would you believe that the pun was completely unintentional?

The twin screw setup is awesome. And if it is ready when I am ready to buy, I'll give it serious consideration.

Bulvot

Never mind, you fixed the link

Bulvot

What exhaust system do you have on the car? How many miles on it with that tune?

ETA - That is awesome! Definitely in the category of what I am looking for.

Carl Fausett

That car has the X-pipe and Stainless dual exhaust on it that we sell.

Bulvot

Ok, so it would be pretty close to how mine would sound with your setup. I've got a cross pipe and RMB. I played the video a couple of times and it's very tempting!