weedburner said

In the 9-10sec zone under 3500lbs, drag strip performance with a 'tamer is more about how the clutch pulls the engine down and not so much about materials. Iron friction material is generally going to last quite a bit longer than organic at the track, but organic/ceramic/iron are all capable of about the same results.

If you have synchros, the disc's MOI can have a huge effect on your ability to complete a hi-rpm shift. You especially don't want a disc with a lot of weight around it's outer diameter. Organic friction material is pretty lite, but a solid hub/carrier is going to be better for hi-rpm synchro shifting than a marcel/sprung hub design. Also puck style ceramic/iron is going to be a better choice than a long lasting but heavy full-face iron disc.

When it's a street/strip car, you may also want to factor in the clutch's street manners. Personally I can say that I prefer a dual friction disc for a street/strip car. Might require more frequent replacement than an iron at the drag strip, but when they can last a full season I consider the improved street manners worth the trade-off. Don't be surprised if it lasts several years of street/strip duty.

All that said, for a 'tamed street/strip car I recommend a standard lite steel flywheel, diaphragm PP with a ductile iron pressure ring, and a common dual friction disc. Affordable, commonly available, durable, that's what's in my car. Personally I prefer Ram, not sure how ebay cheapies would hold up considering my tach occasionally sees 8600.

Grant

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