Dura-Bond cam bearings - Standard CH-23 or Performance CHP-23 ?
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Homer_Simpson (01-09-2022)
#7
TECH Enthusiast
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OK. I forgot that they offered those. What do your cam bearings look like? IIRC the CHP part # has a better bearing material (micro babbitt) for increased loads. The CHP-23 is pretty cheap. I have a NIB set of CHP 10s I'd like to get sell but they're not interchangeable.
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Homer_Simpson (01-09-2022)
#12
Staging Lane
Looking at the Dura Bond website, I found this:
Being a lubricant itself, the coating provides secondary (back-up) lubrication in the event that momentary oil starvation occurs. This characteristic is especially important during start-up because oil does not reach all critical components immediately.
They list CH-23 and CH-23T (coated) both as "high performance." I used the CH-23 in my build but would have used the coated bearings if they's been available back then.
Fluoropolymer Composite Coated Bearings
This dry lubricant actually penetrates the surface where it has been applied. The primary advantage is that bearings with FLUOROPOLYMER Composite Coating retain engine oil on the surface, even under extreme heat and pressure conditions.Being a lubricant itself, the coating provides secondary (back-up) lubrication in the event that momentary oil starvation occurs. This characteristic is especially important during start-up because oil does not reach all critical components immediately.
They list CH-23 and CH-23T (coated) both as "high performance." I used the CH-23 in my build but would have used the coated bearings if they's been available back then.
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#13
I actually talked to Dura-Bond about this just the other day. It would appear that the difference between CH and CHP bearings is the thickness of the backing material. CHP bearings have a thicker backing material in order to improve the strength of the bearing. Because of this, the CHP bearings have a thinner babbit layer. A thinner babbit layer means less good embeddability if there are contaminants in the oil. This would appear to be the main compromise when using the higher performance CHP bearings vs the CH bearings.
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Homer_Simpson (01-09-2022)