[Jay S]

Originally Posted by P@blo

Last two SPC-8 from rockauto this year were CWC cores. Figured more information is always helpful.

Great info Jay S

You can check and see if what you have is a standard CMC Proferall cam core. My last SPC-8 that was a different core was in 2018. If you measure across the very top of the point of the lobe where it is machined, it will measure .56” on a standard CMC core (118600)that CMC currently sells.

All the cam cores say CWC on them. CWC cast them and CMC or EPC rough finish’s them. I think EPC has a wider variety of core offerings, I think they have a standard that is the same a CMC Proferall, and a better HC for Pontiac’s. They have P55’s also for other brands, but I have not heard of a P55 used for a Pontiac. I wouldn’t think CMC would source cores from EPC, but these days you never know.

From what I understand even off shore cores can have the CWC logo cast into them.

[P@blo]

Originally Posted by Jay S

You can check and see if what you have is a standard CMC Proferall cam core. My last SPC-8 that was a different core was in 2018. If you measure across the very top of the point of the lobe where it is machined, it will measure .56” on a standard CMC core (118600)that CMC currently sells.

All the cam cores say CWC on them. CWC cast them and CMC or EPC rough finish’s them. I think EPC has a wider variety of core offerings, I think they have a standard that is the same a CMC Proferall, and a better HC for Pontiac’s. They have P55’s also for other brands, but I have not heard of a P55 used for a Pontiac. I wouldn’t think CMC would source cores from EPC, but these days you never know.

From what I understand even off shore cores can have the CWC logo cast into them.

Thanks Jay. Interesting information. Measured a newer SPC-8 as 0.48" on the nose and 0.53 on the base circle. The old Comp cams cam I have came out at 0.51" on the nose and 0.56" on the base circle.

I have to ask, are the lobes tapered slimmer towards the lobe nose? Because the comp has more lift.

Merry Christmas guys, I always like reading your posts!