My take on the oiling system crossover tube for the small block

Wyrmrider said

I'll go with whatever krooser comes up with
We fed from the front and fed the rockers externally and did a bunch of other things that probably made little difference- like the cross over tube- but they did not hurt
the tappet leaks hurt and the rocker feed hurts
now we get all this working and YR comes up with timing
I guess when we slotted the main saddles and fed from the side we were somehow addressing timing as well as getting a better hydrodynamic wedge for the mains
listening
never done 8500 in a SBM never had the heads to feed that

Click to expand...

Yr brought up the timing issue in the thread link I just posted.
I believe it is valid as well. But if you read the part of that thread showing the pictures of the Chev and Mopar cranks, they are drilled identical. The oil feed hole location in the block is not.
I believe when you slot the bearing holes that effectively you correct the timing. No one that I have seen that has recommended to slot the bearings has said what this does, but after yr posted the correct
Position on the Chev to be in the center of the saddle it occurred to me that is what it does. I also believe that when you front oiled the motor you probably cancelled the benefit of the crossover.
Opposing feeds I believe would eliminate the velocity.
I restricted all five cam bearings to 1/8 and am feeding the rockers externally from the main galley with an .080 feed hole feeding both banks. IMHO
The thread link I posted shows example pics of how yr fixed the timing. Slotting is much easier IMHO.