JonB wrote:Do you mean to say the concentric slave could be fitted direct to the gearbox by virtue of tapping some bolt holes in the front face?
Do you have any drawings showing the dimensions of your mounting plate?
my saab 900 clutch is held to the adapter plate by the small allen screws (I think I remember I rotated it a bit to make sure the bleeding port would be on top at an angle, so extra holes were made and one shows on the photo), the big allen screws are attaching the adapter plate on top of the original cover, with small columns in between to transmit the clamping pressure.
the stock setup shown on Vince's photo shows the tube that needs to be taken out (press fit) - in my case I think a true flat was machined on the cast stock cover where the tube exits, as well as a registering diameter for better locating the slave, the adapter plate fitting around the stock cover, and clamping pressure goes through the 4 small columns between the back of the adapter and the stock cover. Actual slave longitudinal location comes mainly from adapter plate thickness (17.1mm + plate thickness is the total setup thickness, the 17.1 being the result of fitting the plate to the stock cover after registration machining).
If I want to reverse the setup I'd need to press back the original tube into the cover (probably glue it as well, press fit was not very strong iirc).
no drawing or dimensions, only what was documented on my post on the forum then (I don't recall the thickness of the stock place, but rather than a hefty block it was decided to use a plate and 4 columns, 17.1mm long, to get the clutch bearing at the right location
JonB wrote:I suppose it would be better with a standard clutch. How heavy is yours? I measured the weight required to depress my clutch by using a piece of timber. Put one end on the clutch pedal, and use a suitcase weighing gadget hooked to the other end. Then pull the gadget and read off the weight registered when the pedal moves. Doing this I got 23Kg.
I suppose also - I opted for the Helix heavy duty (QED supplied it - no affiliation) as I wanted all chances on my side for a durable solution.
I find mine ok except after 1 hour of stop and go in traffic jams... for these I eventually got the habit of doing a lot of 1st/neutral/1st gear changes, so that I don't need to hold the pedal for too long. I haven't calibrated the pedal pressure, car is away for the moment - I may do it for curiosity