CAM Regrinds are back

[XfireZ51]

What works for me is to think of it as the ratio between base circle height v lobe height. If the base circle represents where the valve is closed, then the valve begins opening sooner, open longer and deeper with the regrind. The center of the base circle is moved closer towards the tip of the lobe. Having just had a larger intake installed, I can tell you it changes the bass note of the idle. You won't be balancing a nickel on the plenum anytime soon.

[VetteMed]

Originally Posted by Coupe89

I'm wondering if I got this right.
Do you need to install smaller cam bearing if you do this?

The bearing surfaces are not reground - only the lobes.

[LGAFF]

At Pete's today, we confirmed that the regrind, which is about .025 to .030 ground off the stock cam, will allow me to use the new stock OEM replacement lifters, despite the valves being set in from 2 valve jobs. If Phil lets me, I will write an article on checking the lifter height to ensure that the cams do not hang the valves open.

[A26B]

Let you write an article???? I'm sure he would be very happy to have your contribution. I know you'll put some photos in there too!

[Locobob]

Originally Posted by LGAFF

At Pete's today, we confirmed that the regrind, which is about .025 to .030 ground off the stock cam, will allow me to use the new stock OEM replacement lifters, despite the valves being set in from 2 valve jobs. If Phil lets me, I will write an article on checking the lifter height to ensure that the cams do not hang the valves open.

So we have an effective height difference of .025 to .030 to be absorbed by the lifter preload then?

[LGAFF]

Correct!

[Locobob]

Originally Posted by LGAFF

Correct!

Well that doesn't seem bad at all if the lifter does indeed have .060 of play like I have heard.