Drilling thrust?

Anybody ever drill a small oiling hole through the saddle and bearing on the thrust to keep wear down on a heavy clutch equipped combo? Thinking of doing this, as I’ve read about thrust problems with early hemi/ clutch combos. This particular engine has (more) modern 340 main bearings.
All thoughts and opinions appreciated.

I never did this, but recently saw it on a youtube video. A turbo car and they are low budget. SO instead of the roller bearing machined in the front of the crank, they drill through the bearing to the passage. I thought it was a great idea to direct oil the face of the thrust bearing. they didn't say what size drill but I would think if you went too large, you could always drill the hole in the bearing smaller??

interesting idea

I have done this many times when I was building big HEMIs. I also chamfered the thrust edge where the two shells meet in order to help spread the extra oil. It always seemed to work fine.

Why are you running a "heavy" clutch? I can't think of any reason to run something like that. Just curious.

I disconnect the Clutch safety starter switch and make sure I DONT depress the clutch on starts. In my mind that’s plenty of precaution to ensure little to no thrust bearing wear.

Im not actually. I am running a high rpm launch program though, so i would imagine this would make the thrust happier. Just extrapolating off of the things I have read about heavy (meaning release pressure) clutches.
Mine will have a MCLEOD or RAM slipper.

WHAT SIZE WAS THE HOLE DRILLED? AND SAME SIZE HOLE IN THE THRUST BEARING?

Wrong post.

Been doing this since the 70's on NHRA Stock eliminator small blocks.

I do this on most Big and Small Mopars as well as Fords or anything with the thrust bearing on the number 3 main. It really helps especially with a manual trans application. I'm a believer. J.Rob

Ok. A sintered iron set up is not what I'd call a heavy clutch. I have never drilled one, but there is nothing wrong with it. In fact, I probably should do it but since I've never had an issue (yet...knock on wood...probably screwed myself by saying that) I have never done it.

I can say it's a very good idea.