clutch discs

[rickles8099]

whats the difference between a six puck and a four puck? does one hold more power than the other? is one more harsh on engagement?

[twkdcd595]

4 puck is more harsh on/ off of an engagement than a 6 puck... given all other things equal... like the same friction material, both are sprung or unsprung, etc.

they both should hold about the same torque rating.

[mike93hatch]

given youre probably talking about d-series.. you should never need more than a good 6 puck and good pressure plate a.ka. action. i would never use a 4 puck.

sprung or unsprung, it doesnt matter, ive ran both. there is no difference in clutching or shifting between the two. the only difference i see is the unsprung ones have less shit to go wrong but they also like to strip the splines out of the hub since there are no springs taking some of the force. i would stick with sprung unless its a track car.

[rickles8099]

given youre probably talking about d-series.. you should never need more than a good 6 puck and good pressure plate a.ka. action. i would never use a 4 puck.

d, b, f, h, k, any series. mainly wondering why would you want a four puck instead of a six puck, vise verse, if they handle the same amount of torque.

[LowePerf]

Four puck has more holding force. The reason being, given the same pressure plate pressure the four pack has less total square inches so it would have more pressure per square inch. Or put another way, a pressure plate with 500 psi of pressure on a six puck has 500/6 = 83.33 pounds per square inch. The same pressure plate on a four puck would have 500/4 = 125 pounds per square inch. This is with the pucks only being 1 sq. in. ea. but you get the idea.
-John

[Waffles]

Four puck has more holding force. The reason being, given the same pressure plate pressure the four pack has less total square inches so it would have more pressure per square inch. Or put another way, a pressure plate with 500 psi of pressure on a six puck has 500/6 = 83.33 pounds per square inch. The same pressure plate on a four puck would have 500/4 = 125 pounds per square inch. This is with the pucks only being 1 sq. in. ea. but you get the idea.
-John

Now I understand....that one had bothered me for a long time.

[rickles8099]

Four puck has more holding force. The reason being, given the same pressure plate pressure the four pack has less total square inches so it would have more pressure per square inch. Or put another way, a pressure plate with 500 psi of pressure on a six puck has 500/6 = 83.33 pounds per square inch. The same pressure plate on a four puck would have 500/4 = 125 pounds per square inch. This is with the pucks only being 1 sq. in. ea. but you get the idea.
-John

:respect:

[twkdcd595]

Four puck has more holding force. The reason being, given the same pressure plate pressure the four pack has less total square inches so it would have more pressure per square inch. Or put another way, a pressure plate with 500 psi of pressure on a six puck has 500/6 = 83.33 pounds per square inch. The same pressure plate on a four puck would have 500/4 = 125 pounds per square inch. This is with the pucks only being 1 sq. in. ea. but you get the idea.
-John

interesting but that makes me curious. so a 6 puck will have more surface area as you suggest in your reply (generally speaking)... so based on that I would think you would not need as much clamping force per square inch to hold the same power, no?

i would think that your holding force would be augmented by the increased friction surface.

[mike93hatch]

the more surface area, the less pressure per square inch.