Matching the bolt pattern, H/P, finger height and T/O bearing is all that's needed for an exchange. Both engines use aftermarket steel flywheels that are drilled for both Long and diaphragm patterns.īoth of my diaphragms are "off the shelf" items bought at our local clutch re builder, South Bend Clutch, but should also be available at other quality re builders, like Fort Wayne Clutch, etc. I'm running a diaphragm on the flathead in my '32, and on the 428CJ in my project '40. I don't know of any high HP Mustangs/Camaros/Vetts/Chargers etc that don't use a diaphragm. Sorry moefuzz, 'ole buddy, I'll have to dis-agree with you on this one. etc) are now available to directly replace many Long (Ford) style pressure plates with the 3 pairs of odd spaced bolts.ģ-Diaphragms have been the standard OE pressure plate for well over 30 years, because they are cheaper to make, (fewer parts, no coil springs to mess with and/or adjust), require less pedal effort, and, for most uses, superior. I'm not tying to sway any decisions, but some facts may be helpful.ġ-The diaphragm ("Chevy") pressure plate has two different finger styles, "straight" for large T/O bearings, and "bent" for smaller bearings.Ģ-Diaphragms, normally with 6 evenly spaced bolts, and direct replacement for Borg&Beck plates, (like '49-'53 Mercury, early G.M. Tremendous clamping power and long wearing. The Ford pressure plate is a pretty tough unit. By turning an allen screw located on top of the spring, the pressure can be increased. Some Long Style clutches feature adjustable static pressure. The 4-cylinder crankshaft may be supported by 4 or 5 main bearings the 6-cylinder crankshaft has 7 main bearings. A ball pivot valve train is used, with camshaft motion transferred through the hydraulic lifters to the rocker arms by pushrods. Rocker arms are retained on individual threaded studs. Long Style clutches were prevalent in early Ford muscle cars and trucks. (Ccylinder) and l-5-3-6-2-4 (6-cylinder). The The Long Style pressure plate is best utilized with mechanical release linkages. (Counterweighted levers have provision for installation of weights to the backside of the levers to further increase the centrifugal clamp effect.) This is true in both counterweighted lever Long Style pressure plates and also non-counterweighted designs. As engine RPM increases, the levers in the plate pivot against the cover and apply additional clamp load to the clutch disc. The inherent advantage of Long Style pressure plates is their ability to apply centrifugal clamping pressure.
GM INLINE 6 CASTING NUMBERS 877127 PROFESSIONAL
It's design is the basis for today’s professional drag racing clutches. The Long Style is the most popular type of pressure plate for drag racing applications. Typical Long Style pressure plate Weights are added to the clutch levers to increase the plate pressure as RPM increases Long style pressure plates are the Ford version of a three lever, coil spring pressure plate. Exploded view Counterweighted lever (top) and standard lever (bottom).
Tell your dad looks are deceiving and the inferior multi finger pressure plate will generally wear faster and apply far less clamping force than those supplied by Ford. Why would a person want to put a inferior pressure plate in where a superior plate was?
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