Still 10 psi, but Im not gonna worry bout it, it comes right up with rpm. The gears still sit below the surface of the pump cover, even tho its a TA cover, Im pretty sure that's the cause of lower than wanted idle pressure, even with the longer pump gears and the spacer plate, I just have a regular gasket (no shims needed) for the pump cover. I MAY sand the spacer plat and see if I can tighten up the end clearance Other than that she seems to run strong, hope it shows at the track
You know what I would do Mark? I'd machine the spacer plate the required amount and get that end clearance down to the minimum .002. Pretty simple once you figure out how much to take off.
You need a new cover. I may be wrong but TA doesn't make that cover. Larry's fix would work but likely not cost effective.
That is a new TA cover that they say they blueprint out. Standard gasket is probably abt .003 Put a .0015 on that cover to tighten clearance, or thin the spacer plate a grand or so. 10 psi hot sucks on an all fresh bearings rebuild.
.0015 gasket would be ok if the gears are .0005 deep. Any more than that and it's still out of spec. What year did you buy the cover, Mark? The incorrectly machined cover would not explain the sudden loss in pressure though. It would be crummy all along.
I believe it was at least 2 years ago. I thought of this yesterday... Heavier oil than 10/30... Nope, all that does is skyrocket cold pressure, and raise hot idle/cruise a couple pounds at best, Been there done that Heavier relief spring than the blue 70 psi spring in there now to raise WOT hot pressure... Nope, that aint gonna do it either, the pump is NOT efficient enough to make the 70 psi hot WOT now as it is. Gotta make the pump more efficient.... decrease end clearance Im going to try as Larry suggested, sand the spacer plate for the longer gears. That's a HUGE advantage to the HV/HP pump, the spacer plate is actually an extension of the pump housing, therefore the gear pocket CAN be adjusted for a poorly machined gear pocket (too deep in my case) As Jim Weise said, an issue has followed me from the old build to this one, the issue is the timing cover, AND the adjustable regulator. Removing the adjustable regulator cured my dropping oil psi as I would accelerate on the highway (not sure the exact "hows or whys") But Im sure it was something I didn't have set up properly ( wrong spring length, too many coils, not enough, cranked in too far, or not far enough
hold on here a second.....you have the hv....aka longer pump gears......but they still sit below the ta cover?????? my hv gears sit way beyond the cover......this is why the spacer is needed. if you gears are below the ta cover and your running the spacer something isnt making since. or do you mean the are below the spacer when on the cover. this makes more since my spacer is held in place with roll pins to make sure the spacer doesn't move around and mess up the side clearance in the pump. if yours is the same way it should be a straight forward machining process to thin that spacer down and easily keep the pump cleances. If you have stk gaskets both above and below the spacer you can gain a good amount of clearance you shimmying them down in both spots.
Mark, I'm still betting the welded up frt cam jrnl may be .0002-.0004 under orig size, which are usually on the low side of tolerance from manufacturer anyway. Blend grinding after weld (to keep runout in check), just about guarantees removal of an additional .0002-.0003 Remember, this all started with your roller cam, and possibly the modified jrnl.
You are correct the longer gears sit below the spacer for the HV pump, everything just followed the deeper pocket.
Anything below the surface is no bueno. Mill that spacer plate the right amount and you are good to go. End clearance is end clearance. It's alot easier to machine the spacer than the timing cover gasket surface, and the oil pump won't know the difference.
Or you could throw the HV gear set in the trash can where it belongs and just use the standard gears with the proper end clearance. If that does not give you proper oil pressure you have an internal engine clearance problem. Bearings or a crack in an oil galley. Don't over think it. Like Mr Scott says "the more you over take the plumbing the easier it is to stop up the drain".
Just checked the pump, my bad, the gears DO extend above the spacer plate by .0035, I had a paper gasket on there .008 thick, so my gear end clearance was .0045. I have an assortment of paper gaskets, I found one .005/.0055
Mark my gut tells me you have to pull this thing and take it apart. You'll find something. Otherwise I'm afraid you're going to cost yourself alot of preventable money. This thing is a time bomb.
[QUOTE="Mark Demko, I had a paper gasket on there .008 thick[/QUOTE] Why would you.......? S l o w down.....