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Sorry to jump in with a question: But my new 408" has what I would say unusual high oil pressure...75# - 80# at idle completely warmed up....I switched from 20/50 to 10/30 as suggested in another thread and it did lower it to 65# - 70# but still climbs to 100# as the rpms climb? It does have a Mellings HV pump and also we threw a 90* oil filter adapter on it as it was all we had lying around....it is untouched (meaning it has never had any of the neat tricks I've read about done to it to improve flow). I also run a Wix 51515R filter.

Could the 90* adapter be the problem or at least part of the problem...??????

Or am I just overly concerned...??????

Thanks in advance,

Rickster



Doubtful on the 90* filter mount... my big concern
would be possibly blowing out a filter or filter
base O-ring... I ran a stock 90* mount and never had
any where near that pressure




Having never used one I wasn't sure. I could just swap out to the standard pump I guess.....my engine builder said not to worry about it so I probably won't.....my 565" in the vette alway ran 65-70 at idle and up to 85-90 through the traps and never had an issue.

Didn't think the filter could blow out....isn't there a pressure regulator valve that keeps that from happening...???? Showing my ignorance today

Rickster