Thread: high volume or standard oil pump???

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no .to much blow by or he running a vacUpan type breather on a full EX this will not work you have a breather problem you need to vent the crank cass if not it will do it for you it will blow the oil pan seal out or any seals rear or front seal.

Denny, good info, but it's basically the same as I have read before. I use only Mellings pumps too. The books I was referring to are a general engine building manual, two big block chevy books, and one small block chevy book. If I had them here, I would post the authors, but they are at my garage. But they all state that there is no NEED for a high volume pump in almost all instances. I suppose if it makes one feel better to have one in there, go for it. But between the books and articles I have read, plus the advice of two machinists that I know, and two performance engine builders (one of them quoted above), I dont see a need for it. If I were building a race only engine of any sort, I would consider some different choices. Otherwise, it's gonna be a standard pump for me, with a high pressure spring. I have been reading posts for years about this choice, and it seems to be a 50/50 mix of opinions. I cant see that ever changing! We're supposed to get that 94* temp tomorrow, and for the next few days! Well, I guess it's better than snow. John