who is running MRL (BAM) Lifters without lifter bore sleeves
That's exactly the point. I have not seen many on this thread state what they are intending with the motor. IMHO the guys that are having oil pressure issues is because you did not plan the build correctly. Like Pittsburg racer said earlier, you should really never plan to run any kind of roller lifter in a La block without either tubing the galley or bushing the lifter bores. What kinda cam lift. How much spring pressure. What rpm range etc.
In a mild street build I personally do not see the reason for a roller lifter. IMHO.
I do not have an oil pressure issue 25psi hot idle, 60 psi hot cruz'n speed.
My engine is a 340 .030 over LA 1969 date code, stock oiling system, stock lifter bores that were measured within spec and in good shape.
10.5:1 compression
Ported X Mopar heads with a port matched Edelbrock dual plan manifold, MSD pro Billet distributor
Cam is a Comp Hydraulic roller P/N 20-811-9 Lift is .538/.534
Comp valve springs 150 closed 320 open, Comp roller rockers
Street application will never see over 6000 rpm, cruz'n rpm at 70 mph - close to 3000rpm
Engine produced 452 hp corrected on a engine dyno
My issue is the crappy Comp retrofit roller lifters P/N 8920 they bleed off very quickly and rattle like hell on start up hot or cold regardless of how much preload you have. Block was cleaned twice very well before assembly including scrubbing the oil galleys, I dont believe trash in the engine caused the bleed off issue.
None the less, Comp Cams has suggested that if I cant live with it (not) to swap the hyd rollers for solid rollers Comp P/N 828
Solid lifters on hyd cam grind? I have been told by a some Forum member that this possible to do with a tight lash. I will never again use any kind of roller lifter for a street engine.
Your comments please, thanks in advance