Comp XE-R lobe base circle vs. stock
#41
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Originally Posted by GuitsBoy
Is this a bad joke? I cant see those muffler bearings requiring .160 shorter pushrods.
Originally Posted by Patrick G
Pushrod checker is not the answer I'm looking for. I'm looking for the base circle cam dimensions of a Comp XE-R cam and how that compares to stock. Even more importantly, how that base circle dimension change affects pushrod selection, if at all compared to stock.
#43
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4784R/4445F are the intake/exhaust lobe types for that cam mr2guru. I measured a Comp Cam XER cam with lobe types of 3725R /3728R and the base circle measures 1.452 and my stock cam measures 1.553. Real close to what Sidestep posted and I'm using a not so accurate digital caliper from Harbor Freight.