GregBBRD

Exactly.

I made (and keep in stock) a super lightweight flywheel that uses a Tilton clutch and a "push T/O bearing" for track use, years ago. This clutch works great, on a dedicated track car, but is way too "severe" for a street car.

There was a "huge void" between a beefed up dual disc clutch and the "Tilton" clutch (the "puck" discs are too severe for street use (in my opinion) and still have the problem of using the thin "straps", which break routinely, that hold the pressure plate together) so I've been working on this clutch set-up.

The weight of this entire package, along with other factors like pedal pressure, has been carefully engineered specifially for use in a street car.

The Carbon/Carbon clutch material has already been proven to work great (go to turboclutch.com). This is that technology applied to a 928 application.

90 S-4

I stopped by there Friday to see the goodies, All I can say is that is some
seriously well thought out and engineered hardware.
You 5-spd guys are definitely in for a treat, it looks like your clutch
problems are a thing of the past.
This clutch package is the equivalent of a GB 6.5 mtr.
Great job Greg !

Mark Anderson

Not true,
We have some now.

GregBBRD

The stroke is actualy a bit long and we are going to have to install a stop to control how far it travels.

Pedal pressure is delightful, to me. Softer than a stock GTS, for sure. Probably about the same as a stock DD with a new pressure plate....so fairly soft, without being so soft that you can't "feel" it.

We are still "fitting" and "playing" with it....trying to make things perfect.

Hopefully, we will be able to drive it, today or tomorrow.

hacker-pschorr

Let's get down to the meat and potatoes here.....how much and when can we start ordering?

IcemanG17

Hacker
"if you have to ask.......you can't afford it"

I'm currently developing a "Doc Brown wish fund".......even have a whopping $.25 right now!!!!

hacker-pschorr

Greg offers layaway, doesn't he?

GregBBRD

I honestly don't know. Need to sit down and talk to Rob at RPS. The last time we talked "price" was 2-3 versions ago.

I'm sure with the huge quantities that the 928 world will need, it will be really cheap....

brutus

Cheap is a relative term. Do it right once or do it wrong over and over.

blown 87

Dan87951

One thing is for sure. If Greg is behind it, its definitely going to be an excellent product!

hacker-pschorr

I know that comment was meant to be tongue in cheek, but in reality the cost of the stock clutch is so high, there is a lot of room for a superior aftermarket option, even if it costs more.

Especially for the track crowd, and those with modified street engines that are willing to convert the single to a double.

GregBBRD

While price is always a factor, my bigger concern was "solving" the "928 clutch problem".

My mild street stroker engines have reached the power output range where a single disc is absolutely worthless....I'm not sure one of these would get you "around the block", at full throttle. A stock dual disc slips like there is a torque convertor attached, in the driveline. A beefed up dual disc will live...but for hours/days/months....depending on how hard you drive the vehicle.

With the power output numbers that I see "quoted" for the supercharged vehicles...I have no idea how they make a clutch survive. There's really something really mysterious about this that I can't quite get my head around....

Most of the engines I've been building have been going into vehicles with automatic tranmissions. Because of the lack of a "satisfactory" clutch, I've been forced to discourage people with 5 speeds from building high output stroker engines. Rob Edwards engine, although it is very fast, is actually very mild and drives like a stocker...until you mash down the "loud" pedal.

This was a real problem...for people that prefer a 5 speed. Tough to put all those dollars into a stroker and not be able to drive it....or drive it with a "chatter master" puck disc....which would "ruin" the car, for me or any of my customers.

Hopefully, this will fill that gap and I can move forward building higher output engines for the 5 speed cars. This original version is a dual disc. Rob at RPS claims it will hold 700 horsepower and still be smooth. With this "original design" we tried to create as much room as possible, inside the bell housing. The result was that we have enough room for a third disc...which will "hold down" 1200 hp.

This original "twin disc" clutch will get a slightly redesigned flywheel to make installation easier and use "up" some of the "extra" space we have inside the bell housing.

John Veninger

Would that be 928 cheap or Porsche cheap

GregBBRD

Porsche Racing Cheap.

Should be in the dictionary as an example of an oxymoron.