tiara4300

Thanks for all of the suggestions guys. I never would have imagined the clutch kit would be so tough.

BC

That's what I mean. It shouldn't be.

blown 87

Price out a full single disk with the updated parts, you will be close to that price if you use all factory parts.
Like you I was shocked at the quote, and I am pretty much immune to how much parts cost on cars these days.
That is one area that the 928 never fails to awe me, how much the parts are.

There are a lot of advantages to the DD clutch, lower pedal pressure, the ability to hold more torque, better throttle response are a few.
There are also advantages to a SD clutch, cheaper, easy to install compared to the DD setup, less likely to chatter, which the DD will do unless it is perfect on the PP and IP.

I was interested in a 7.25 clutch, but I could not find any one who ran one on the street in a 928, it sure would improve throttle response.
I just can not afford to be on the bleeding edge like some can.

BC

Well Greg, when you amortize Simard's stuff over, say, 3 years, it seems more palatable. Maybe that's 5 years. I see way more value in those pieces than some "yeah, we will make it, but its going to be expensive" OEM part.

I know parts prices are higher on "exotics". But there is a limit to the rationality, and I really commend Simard and others for giving us alternatives. I know GregB also made something as well that allows other clutches. We have a great community if you look at the people like that.

UncleMaz

Looking over 928 international used clutch parts, I think that seems like a good way to go. Especially if your PP is in spec. Given the hours and hours it would take to do a 944 clutch, not to mention a 951 one, it seemed silly to not repace everything with new. Given the relative ease (admittedly I have not done one yet) of the 928 clutch, I would have zero issues putting in good used clutch parts. I hope my clutch holds out until the 50% sale. Climbing up the Cajon Summit @ 2 MPH on Friday, the clutch may not cooperate.

john gill

Interesting here in Brisbane , Jim Berry from race clutch will refurbish the porsche sachs clutches and modify them so they are bettter then they were new.

He believes that the straps in the twin plate are a joke (hates them) , he changes them to his own design and changes improves it . I am putting the twin plate into my race car project .

So what is old can still be new

Mike Frye

Boy am I glad I saved all my old clutch stuff! When I did the clutch in my car 3 years ago it only cost about $1800 for all new parts. Since I bought my car for just a little more than that I could justify a few expensive bits.

I'm pretty sure it was original and if the current one lasts for the next 20+ years and 200k miles I'll be happy, but if not I guess I'll be shopping or a relining and sending the T/O bearing to Roger.

$2500!?!? wow.

Ethre

Educational question Greg:

How does a 7.25 clutch improve throttle response over the stock dual disc?

blown 87

Yea, mike is a real artist in the machine shop, I lust after some of his parts at least once a week.
His race car is outstanding.
When I was doing my transmission conversion I looked at all the options, I simply could not afford his clutch at that time, but in retrospect, after all I went through to get the DD clutch working, I should have just got Mike stuff.

blown 87

It is lighter and smaller, less mass, and I do not know how the smaller diameter effects it, but it does.

BC

There are also additional fun options for materials and multiple-plate clutches. In the end, you could even get a carbon one.

BigCavolo

I spent over 4 grand for a full clutch replacement. New housing and everything that goes around the plates. That was with labor. I didn't know about this forum then and thought that was my only choice. Anyway, it's for sale as I need to part out this car to save my finances. It is in an '82 non S so probably doesn't fit yours. It shifted like a dream though on the way home from the shop.

blown 87

When I checked with Tilton, they told me that the carbon disks were the only ones they recommended for street use, only four grand for the friction disks.

But remember, what they recommended changed with every person you talked to there.

Mike S thinks that the organic ones would work fine, and if I can make the power I think I can them I will have to go to a different clutch at some point.

IE a blower, head work and Mikes cams.

BC

Right. The organics would probably hold 500 or so. I have all the pieces to sc the 86.5, and that is the stock (recently replaced it looks like) clutch. If that one goes - its onto Mike's stuff. I need to get his throw-out bearing aparatus and the disks. I just have his flywheel. Its hanging on the wall like a van Gogh.

blown 87

They are works of industrial art.
Just getting the (concentric for lack of a better word) slave cylinder/release bearing would be a major step forward.

I really think that with head work, cams and the 2L autorotor I will be over the 500 mark, in HP at least, not sure about the torque though.