Originally Posted by tex013
What are peoples thoughts on this ?

I am getting some oil pressure fluctuation just before finish line then some drop when backing off .
Normally run 60-65psi wide open , is fluctuating down to 50/55ish then back up to 65 then drops to 30/35 when i lift . Comes back up after about a second or so to 45 . RPM is slowing through 4500 at this time .
Motor is a Mopar big block , 505ci . It is a World iron block , Mellings HV oil pump , solid flat tappet cam . It has a Milodon road race oil pan with 8 1/2 quarts oil , Penn Grade 20/50 currently . Will be going to Royal Purple 20/50 . New motor has about 20 passes and 6-800 street miles . Vehicle is my daily driver , bracket race monthly .
Oil pressure cold is 70psi , hot is 18-20 psi in gear idleing jumps to 40psi from idle to 3500 then up around 65psi . I do not have any issues in daily street/ highway running

Thinking whether I go to an Accusump . With manual valve so as only operating on race day . 45 or 55psi switch ? Sandwich adapter at oil filter.
Try an extra quart of oil ?
Not much room in the engine bay , 68 Satellite . .

Tex



Your oil pressure doesn't make sense. You are using a 20w50 oil and only have 20 PSI hot idle pressure with a HV pump. That makes no sense.

I'm not a fan of the accusump. Just another place for leaks and more plumbing.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston