Diablo clutch recommendation

Wasn't there someone in the US east coast doing the pull to push conversion using corvette parts? It was a fair while ago and the memory is hazy. Might have been on L P o w e r.

 

i am currently documenting a conversion from the Sachs to Valeo clutch over on another lamborghini enthusiast site lamborghini dash talk dot com.

you are correct the TO bearings and clutch disc are NLA, and they havent been for over a year. you can get the clutch disc resurfaced, but the TO bearing is a problem unless you can find a reputable source to rebuild. The main work involves machining the bell housing (Valeo clutch is a larger diameter), and modifying the TO bearing sleeve (the Valeo TO bearing has a larger diameter). You also need various other bits, like the clutch rod.

 

its an easy job for a competent machinist. The ID of the Sachs TO bearing is smaller than the Valeo. Take them the Valeo TO bearing, and have him put a sleeve on the Valeo sleeve to the proper ID of the Valeo TO bearing. You also need to countersink new allen bolts to clear the TO bearing. Originally, I bought a later model Valeo TO bearing sleeve, and can see no reason why that wouldnt work. It mounts from the rear (vs the face), doesnt seem to interfere with anything on the gearbox side, and creates just as good of a seal as the Sachs sleeve. I decided to sleeve the Sachs sleeve vs using the Valeo sleeve simply because i knew it would work (because other have done it).

if you order a new flywheel and pressure plate from Lamborghini, it comes as a balanced assembly (clutch disc not part of the balanced assembly). Those are in stock and available now. Not sure if the Sachs units come as a balanced assembly, assuming the do. If you are resurfacing the flywheel and pressure plate, I think you just line them up as previously balanced, but someone more knowledgable can chime in on that.



If you resurface your existing

 

FYI standard industry practice is to balance each component individually, flywheel, pressure plate and clutch disc. If you balanced as an assembly, you would have to serialize all the parts of the assembly and keep them as a matched set. This would not work in a production environment. Unless you are modifying the parts there is no need to balance them again.

Cheers Jim

 

I had a 1994 VT from new and because a friend rode the clutch (Sachs) I had it replaced (this was in 1996) with the Valeo and it was night/day difference in driveability, with the Valeo being very easy to engage (pedal effort became very easy).

You might check with drivenexotics dot com if the have any carbon fiber clutches available, Al Burtoni made them as a replacement, they are excellent.

 

Due to high effort/force required, the Sachs clutch is super positive, you know just where you are. Valeo, more like a Volvo, it works, it's light, but you do not have the feel like the Sachs, just push it all the way to the floor for each gear change.