mark kibort

very nice! I thought that would all be tied to a tildon or something. very cool
cost??
does the stock throwout bearing just mount directly in the pressure plate, like a stock clutch, or are there some other mods that need to be done. I cant visualize the rest of the mechanism. the clutch lever? ball? or do you use a hydrolic acutator. My bmw racer buddy just showed me his clutch set up. no levers, just a hydrolic actuator (maybe 1 lb) and the tildon clutch set up. it was REAL grabby, but shifts were very positive! I dont know how light, but it was real light compared to our stuff.
mk

Jim bailey - 928 International

This is a RACING clutch and flywheel. It fixes several problems that you have with racing use of ANY stock 928 clutch... single or double disc.

BC

What are you doing about the next weak link - the trans?

Lizard928

I would imagine that a hydraulic actuator gets hooked right to it,
as from the looks of it the fingers need to be pushed not pulled.

Mark Anderson

Actually this is 10 lbs lighter than my flywheel. Remember you need to also add the weight of the starter ring gear. My flywheel is a modified 85 5sp to which I have to bolt on an intermediate plate for the ring gear. I did remove the friction surface from the intermediate plate to save weight.

928ntslow

John, you will have to get used to the clutch hooking up and the tires spinning now. I suspect you may have a few unordered donuts in your future if your not careful

IcemanG17

Triple disc clutch......is it a tilton?

Shane

Dude I could buy another 928 for what one of those cost....

mark kibort

so you found the dimensions of how far the friction surface needed to be, then you bolt on your intermediate plate with some kind of spacers to align it to where the old one would sit, then the new clutch pack fits in the middle?

Do you use the stock levers, slave cylinder? or do you have to do some trick things to fit all that in the bell housing and make it work?

that little think in the middle of the upper bell housing. Is that the T/0 bearing and actuator? I think thats what my bmw buddy has. it has a fitting on it for a clutch line and it is actuated via the clutch line and you then loose the slave cylinder?

great shots, thanks!

Mk

mark kibort

If you are trasmitting 500 ft-lbs and dont change you transmission, you probably wont be winning any races! It just seems to me that the limit of the 928 transmission and clutch is in the 440rwhp range. after that, i just dont think the street born box can handle serious racing, unless you are very careful and thoughtful with your shifting. We dont know, but one of the possible reasons for Mark loosing 3rd gear recently, and breaking a transmission earlier, could be due to to the new found lack of compliance with each shift with this much "grabbier" clutch. when you look at the real racing transmissions, they are much more sturdy than our 928 gear boxes. However, there are some BMWs with 300rwhp, that run multiple seasons on a little tiny transmission that looks like you could put it in your pocket.

Good luck guys! you are blazing new trails for us all to benifit from!

MK

Mark Anderson

I do use the factory master cylinder but there is no slave as the t/o bearing is hydraulic (pictured on the bell housing)

Stan.Shaw@Excell.Net

A picture is worth a thousand words

Very nice

dr bob

That looks amazingly like the ATE throwout bearing/annular slave cylinder setup in my early-eightees Saab.

brutus

There really are very few new ideas when it comes to cars most things have been done before. The small diameter triple disc clutch with hydraulic release being is just one example of that. The lightweight package would make heal and toe important to match RPM but what a nice piece of workmanship .

John Veninger

yes, but that sure would be a 928 in dire need of repair!