Notched lifter Bores

[F-BIRD'88]

Does notched lifter bores also help provide more oil going to the wheel and roller bearing in a roller lifter?
How effective is this at extending the service life of
moderate "street strip" application "street roller" solid roller cam setups.. (And hydraulic roller too)

True moderate Street Roller stuff, not hardcore max race application stuff.

[nhrastocker]

It depends on the brand of the lifter. There are lifters that have provisions to force oil into the roller or bushing.

[F-BIRD'88]

It depends on the brand of the lifter. There are lifters that have provisions to force oil into the roller or bushing.

Reference:
Notching the lifter bores to gain oiling of the wheel and roller bearing using roller lifters that do not have direct oiling.

[miniv8]

I was contemplating this on a Gen3 Hemi until I received my replacement lifters. They now have metered oil flow to the wheel.

I was about to build a fixture to file a groove from the lifters side, into the corner of the wheel opening...

[F-BIRD'88]

I was contemplating this on a Gen3 Hemi until I received my replacement lifters. They now have metered oil flow to the wheel.

I was about to build a fixture to file a groove from the lifters side, into the corner of the wheel opening...

I would re- think filing a groove in the lifter body at the corner of the wheel opening... Bad spot.. stress point.
Better spot a lil further in on the flat of the wheel opening roof. It should still get oil where yiu want it to go.
Avoid the corner IMHO. De burr and polish edges of your cut groove.

[ProPower engines]

Does notched lifter bores also help provide more oil going to the wheel and roller bearing in a roller lifter?
How effective is this at extending the service life of
moderate "street strip" application "street roller" solid roller cam setups.. (And hydraulic roller too)

True moderate Street Roller stuff, not hardcore max race application stuff.

No.
I have several types of lifter bore grooving tools that have been available over the years and for the most part they were designed for flat tappet lifters.
You can turn them side ways in the bores but its going to spray the oil straight down towards the pan.

[GARY C]

Does notched lifter bores also help provide more oil going to the wheel and roller bearing in a roller lifter?
How effective is this at extending the service life of
moderate "street strip" application "street roller" solid roller cam setups.. (And hydraulic roller too)

True moderate Street Roller stuff, not hardcore max race application stuff.

Based on the direction the wheel turns I would think you would want to groove the opposite side that you would for flat tappet so the wheel could draw the oil into the axle. If that makes since.

[Geoff2]

The concept is a good idea & works. But notching cast iron is not a good idea. A much better idea is to groove the lifter. I have been doing this for about 30 yrs. Use a Dremel with a 0.020-0.025" cut off wheel, go about 0.010-0.015" deep. Not critical. Roller or FT lifter. If FT, go to within 1/8" of the base, starting at the oil groove.