[DeTomaso] Dry Sump

MikeLDrew at aol.com MikeLDrew at aol.com
Sat Jan 18 16:03:03 EST 2014


In a message dated 1/18/14 12 01 45, guson at home.se writes:


> Even without the wet sump and with an inverted transmission, doesn't the 
> flywheel and bellhousing rather quickly limit the amount of lowering that 
> can be done?
> 

>>>If you do it properly, you fit a GT40 clutch/flywheel/bellhousing combo, 
which is substantially smaller in diameter than the standard Ford/Pantera 
setup.   This is how the GT40 drivetrain was so low--I think a GT40 clutch is 
only about 8 inches in diameter, compared to the standard Ford 11-inch 
setup.

I don't know of any Panteras (with the possible exception of that 
super-radical car in Australia that barely looks like a Pantera) that have gone this 
far.

Safir GT40 Spares is the source for a modern, domestic GT40 clutch/flywheel 
setup.   It is VERY expensive (about $2500, not including the bellhousing).

Here is the flywheel:

http://i692.photobucket.com/albums/vv288/576103/GT40%20Safir%20clutch/Flywhe
el.jpg

With the clutch mounted:

http://i692.photobucket.com/albums/vv288/576103/GT40%20Safir%20clutch/Clutch
Flywheel.jpg

Bellhousing:

http://i692.photobucket.com/albums/vv288/576103/GT40%20Safir%20clutch/Finish
edBellhousing.jpg

Note that it is inverted in this picture--there is a cooling scoop at the 
top of the photo which runs underneath the car to draw air into the bell
housing; it also acts as a skid plate.   There is a mesh screen on the top to let 
heat out.

http://i692.photobucket.com/albums/vv288/576103/GT40%20Safir%20clutch/SafirC
lutchBellhousing.jpg

Here is the whole enchilada together.   The bosses on the sides are drilled 
to accept the lateral bolts used on Dash-1 sideplates, and the two holes 
are to accept the GT40 clutch slave cylinder.   The GT40 slave is a common 
part (lifted from Triumphs etc.) that has bosses cast into it.   There is no 
bracket associated with it; instead, the slave bolts directly to the 
bellhousing.   It operates vertically; that is, the piston faces the ground, and a 
different-style arm is attached to the gearbox to release the clutch.   The 
arm is shaped similar to, but different sized from, a VW Beetle setup.

Mike
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