So my understanding of grooving the lifter bores is to try and get some extra oil dripped on the cam lobes. This sounds like a decent idea - are there any downsides to doing this?

I know there is at least one tool for performing the groove cutting - other than accuracy in the cut would there be any difference in simply grinding a small groove in the bottom of the lifter bore?

Are you running flat tappets?

no- solid roller

I have the tool Goodson sells to groove the lifter bores. IMO it a pain to work with. The only engines I have done are flat tappet stuff for dirt trackers. The idle oil pressure went down a little bit on all of them I did. I have never used it on a roller engine. I stopped using the tool years ago when lifters started coming with oil holes made into the lifter.

quote:

Originally posted by chasracer:
no- solid roller

You don't need them. Only creates more windage

quote:

Originally posted by Coloradoracer:

quote:

Originally posted by chasracer:
no- solid roller

You don't need them. Only creates more windage

I agree with Mark.
A roller cam lobe needs no supplemental lubrication. Your biggest concern in that area, is getting sufficient oil to the needle bearings in the roller wheels. All good roller lifters have pressurized oil feed passages to lube the roller bearings.