Oiling issue to top end of SBC? Help!

Ok, let's catch up...................

I'm frustrated. Here is a list of things that have changed:

- decked block .015
- decked heads .010 and .006 (heads were NOT the same CC before, since they had been welded & repaired
- new cam bearings
- oil pump (how could that matter?????????????)

Things that have NOT changed
-cam
-lifters
-galley plugs
-rotating assembly
-pushrods
-lifters
-rockers
-head gasket thickness

I've made my rockers 100% PERFECT. T&D agrees.

So, we are back to somehow not getting alot of oil up north. I know i'm getting some. while it's idleing, i can bump the throttle and it'll 'spit' oil off the rocker/spring (and make a minor mess on the zoomies). However, i'm thinking i need more oil up there. During a 2 minute run time, there are NO puddles formed up stairs (in the rocker box area).

Ash, is there anyway you can pull a valve cover, clean up any oil up there, and start it to see how much you are depositing up there?????? I would really appreciate it.

 

greg,
when i put the converter back in, i'll have a look...i got puddles of oil up top.

i pretty much have the same stuff as you , bar the hair dryiers...lol

3/8 push rods,
only have inner plugs @ the rear,
std hieght roller lifters,
bbc oil pump , 75 ish psi idle , 125 + @ 7300 rpm

i got a msd crab top dizzy , with o rings on shaft , where you have a mag....
i'll have a think today for you....

 

Thanks Brother. I appreciate it.

 

The oil feed holes in the lifters were not passing in front of the oil galleys in the block, so there was no way for oil to have passed from the galley, into the lifter, then to the pushrod.

All 16 lifters are now grooved from the oil passage area to the feed hole. Now, when priming, AMPLE oil is flowing over the springs/rockers.

The magic question is WHY. This is the identical valve train that was in this block. Same cam, lifters, pushrods, valve springs, etc.... WHAT CHANGED. Nothing. Why did they now not receive oil??????

Either way, the problem is solved. My crew chief came over with a primer and we started disassembling valve train until we weeded out where the oil flow was stopping. I measured the lifter bores and the lifters when we found the problem. From the galley hole to the cam was 1.125". The feed hole in the lifter is 1.5 inches up from the bottom of the roller (cam). So, you'll see there is a .375 difference.

WTF?????????