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I know you are trying to help. It's hard to show feelings with a key board. I appreciate all of the replies so far, really!
I did not check bore size because of the reason you mentioned. 65 psi was cold idle. At 2200 rpm it was at 75 rpm. I didn't take it up higher than 3500 and it remained at 75. When I raced it with the engine at temp. my oil pressure sets, or sat at, 75-80 psi at 6500 rpm.
With that, what mod would you recommend? I'm leaning toward the one that blocks the oil from #4 to the cam bearing and drill and tap in a restrictor into the main oil galleies for rocker lubrication. If any mods, to me, this one as described in the "Power Adder" section, would work best on a street/strip engine like mine.





i wouldn't block any oil to the top end. the pressures you listed above are fine. we run similar pressures on engines that regularly see 7000+ rpm at the track and get driven hard on the street. it's all about volume, not pressure. open up those main passages so the volume gets to the bearings. you'll be surprised how small some of them are as cast. having the 1/2" pickup is great, but by itself it doesn't help much. you need the other passages opened up for it to be effective. one other thing, replace the rod that spun the bearing, don't repair it. if the one next to it got hot, make sure it's checked out preperly or replace it too. hopefully the rest of the damage isn't too bad.


machine shop owner and engine builder