clutch question
Because they are totally different designs. "Back in the day" it was common for some "stocker" (mostly GM) diaphragm clutches to "stay on the floor" at high RPM. I believe some modern performance diaphragm covers have centrifugal weighting, but I'd guess most do not
Your original "3 finger" is called a Borg and Beck. High performance covers have rollers between the cover and pressure plate which throw outwards at high RPM and help press the pressure plate down, increasing pressure. This is one reason you need the helper spring under the dash
Ford, or "Long" designs do the same thing, except they have weights originally cast into the fingers. Aftermarket performance "Long" clutches sometimes have holes there where you can tailer the weights as needed.
Some BB aftermarket performance covers have been modified to use Long style weighted levers, so the "picture" gets muddy
Competition Long with weight holes
These weights are cast as part of the fingers
Because they are totally different designs. "Back in the day" it was common for some "stocker" (mostly GM) diaphragm clutches to "stay on the floor" at high RPM. I believe some modern performance diaphragm covers have centrifugal weighting, but I'd guess most do not
Your original "3 finger" is called a Borg and Beck. High performance covers have rollers between the cover and pressure plate which throw outwards at high RPM and help press the pressure plate down, increasing pressure. This is one reason you need the helper spring under the dash
Ford, or "Long" designs do the same thing, except they have weights originally cast into the fingers. Aftermarket performance "Long" clutches sometimes have holes there where you can tailer the weights as needed.
Some BB aftermarket performance covers have been modified to use Long style weighted levers, so the "picture" gets muddy
Competition Long with weight holes
These weights are cast as part of the fingers
