I am purchasing new bolts/bearings for my rebuild, and was dead set on using h-series bearings. I spoke with the guy that builds my racing engines, and he uses p-series bearings with a "coating" for the rod bearings. What do I really gain by using h-series if this is the case. This engine is using a stock crank and gm847 cam. It will see very limited track time (maybe twice for year).

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The P series will be fine for your build. If you where going with a aftermarket crank you would probably need H series since most aftermarket cranks have chamfered journals.

 

Thanks. So are h-series bearings pointless for stock crank builds?

 

No. I personally think they are a better bearing.

 

I'm doing a stock crank build right now, I haven't got to the bearings yet, but I'll let you know what we come up with and why.

Pretty sure we did H series in the 383 I built.

-Dustin-

 

P-series are overkill for what you're looking to do. While they won't HURT anything (only your wallet) they're usually reserved for the more hard-core racer with frequent teardowns.

 

If P-series are overkill, then H-series must be superoverkill. Which bearings do I need?

I just want to be safe taking this to the road course at Carolina Motorsports Park and being able to really wind it out.

 

Wouldn't it be equally as important to keep clearances right and keep oil clean regardless of bearing choice?

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I have run the p series in all my builds over the years and have never had a problem. My machinist didn't even recommend the nascar bearing, perhaps due to the fact that I am running a stock crank.

 

I have coated cam bearings. IMO I made the right choice.