composite pilot bushing?

[sharp67]

has anyone used the composite pilot bushings? its kevlar and nylon I think? Zoom makes one and says never wears out, no lubrication needed and wont score the input shaft? Looking for feed back on this. Does it work well? any problems? Thanks for the input

[sharp67]

Im installing a TKO600 to a 383 chevrolet, Ive got an scat 4340 star flange crank and Im trying to decide which pilot bushing / bearing to use. I see from previous post most guys suggest the bushing, But the third alternative that I have not seen discussed is the composite pilot bushing. Can anyone please give me feedback on on experience, knowledge, friends experiences etc etc so I can make an informed decision. Thanks Jay.

[Texas Hotrod]

Most clutches that I replace are usually in used/abused work/farm trucks that have lived in dusty/muddy conditions. I have seen many factory pilot bearings fail w/low mileage. The last one was on a Chevy 4X4 that was just out of warranty (38Kmiles). The clutch looked like new, just the bearing was destroyed (and the input was grooved). The old joke is true about a $10 part and a $500 (well, not quite) repair bill.
Newer doesen't mean it's better, I prefer bushings over bearings. I have never pulled a clutch because of a failed pilot bushing. Nor have I ever seen a gaulded input shaft from the use of a bushing. I can't say the same from a destroyded bearing.
I have even made a few custom bushings when all that was available was a bearing and/or when the input shaft was damaged.

Kevlar is used in clutches (friction material) and nylon is plastic (melts under high heat), can the 2 materials be combined?
I would put my money on a brass bushing that can withstand high temps and is abrasive resistant. Some brass bushings are impregnated w/a lubricant and work really well.

Brass is cheap. How much is the composite piece? I would use a brass bushing, but see if anyone gives any other ideas.

[sharp67]

I appreciate the feedback. Based on what you said and what I have read I think Im going to stay away from the bearing. Now to figure out weather to go with brass or composite. I guess the material is called hyglar? its a combo of kevlar and nylon? It may be kevlar with nylon impregnation? its about $30 as aposed to $6 or $7 for the brass. Ill watch for a little more feedback before I decide. Thanks again. Jay.

[00fxd]

If you do go with a brass, and you probably should, make sure you get an actuall oilite bushing . The continent was flooded with cheap chineese cast iron bushings a few years ago.

[molyorange 77]

Brass! here are some good ones GM, FEDERAL-MOGUL, SPEEDPRO they range from $4-10

[sharp67]

I guess the material is called hydlar. zoom sells it?