[67Lemons]

Originally Posted by Jay S

That Edelbrock cam is going to be pretty much the same cam with identical performance as an Melling, Summit, Comp, Lunati and probably a couple others. I don’t know if CMC grinds it, it could be ground in house at Comp on a standard EPC core. You can look and see what you have if you want, find where the cam has CWC cast into the core, roll it over to the other side and see if it says “EP”. If it says EP it was either ground at comp or at EPC instead of CMC. If it says nothing there, it is likely a RA4 cam from CMC, and is ground on the same machine as the Melling and Summit cams.


Often all flat tappets are grouped together for failures, they really shouldn’t be. Mechanical flat tappets don’t have the problems that HFT cams have. They are ground on better cores, with better material. At least they have been, I don’t know what the future looks like. I think when the lash is taken up it promotes lifter spinning also. They are just plain more rugged(unless you go nuts with an aggressive profile).

Here is a photo of a Bullet SFT and a current melling SPC-8 I checked in my friend shop (2018 SPC-8) which is the same as the current CMC cams, .477” was the nose width of the lobe on the SPC-8. Which isn’t bad, I have seen some Pontiac HFT cams that had .455” width lobes. The Bullet UD grind has .564” width over the nose, and the base circle is over .625”. Mild SFT’s are pretty rugged, especially with face oiling.

A gentlemen on another forum just measured his SPC-8 from 2022 he thinks, it’s a CWC core & he came up with .460 lobe width at the peak. Maybe this helps clear up the approximate date on when they switched cam cores on the SPC-8.