Thread: Oil priming question

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Originally Posted by DennyW

So, my engine should have blown up by now ??

I have built many, and no problem if you do it correctly. The high pressure will be there if you have your bearing clearances correct. Man, I don't get it. I do actually build engines.

I am saying that with a 5 qt. pan and a hi volume pump you are sucking so much oil out of the bottom of the pan and under hard acceleration or hi rpm's.Another thing to think about is the extra load placed upon the dist.,gear etc. trying to turn the hi-volume pump.
Also where is the extra oil going to go?
It is also limited by the other oil passages in the engine.
If you don't mod. the oil passages "up-stream" what is the point?
A hi-volume pump is not required for any stocker style re-build.
I would never run a hi-volume pump un-less I had a 7+ qt. oil pan with all the baffles and trap doors in place.
In a 5 qt. pan how many qts. of oil do you think are in the bottom of the pan when he is turning 5,000 rpm's with a hi-volume pump?
How many qts. are trying to be pushed to the valve train and other oil- galley's?
P.S. Denny no one said you don't build engines.

Originally Posted by DennyW

Everything you posted will happen with a stock pump. You think increasing the pressure has no effect ?? The purpose of the high volume is not to dump twice the oil. It's purpose is to provide 20% more oil available.

I don't mean in a race motor. We could talk days about that. What kind of oil pressure do you think them guys run ? If you check, you will find anywhere from 90-120 lbs. I wonder why ? Yes, they have more oil capacity, but all that increase, they need it. A street motor built for the street, if done properly, will npt have a problem with a high volume pump. I don't care what is said on that. I know that for a fact. This always seems to go in circles.

I have a high pressure, high volume oil pump on mine, 5 quart pan. I have held it well over 120 for extended amounts of time, and never ran out of oil. Are my drains blue printed, you bet. The whole engine is, by me.

Theres 6 chevy motors still out there running great that I built before I got out of the shop. I meet those guys about once a month at the donut shop. No problems, or believe me, I would hear it.

Like I said before.Why put all the exta wear and tear on the dist.,gear,etc??
I don't know of anyone that runs 90-120 of oil pressure in a race motor anymore.Maybe at "cold" start up.
At these pressure's it will tend to push any dirt that might get by the filter right into the soft babbit material.
You mention "your drains" are "blue-printed" do you really think the guy with the 283 "blue-printed" is drains?I highly doubt it.
Like you said we can talk about this all night.
I had the same ideas you have up until about 3-4 years ago and at that point and time I would have agreed with you 100%
In the last few years I have changed my thinking a lot.
I hope I did not up-set you with what I said because I respect you and what you have to say on this forum.