Reply With Quotetypo... the OP is at 40-45 at 6000rpm...set up by Dave Ebbert, he is also the one who recommended the Royal Purple. Motor runs fabulous.
35-40 psi at 6000rpm isnt what id like to see. who recommended the 50w oil? ive had great luck with royal purple, but i also run 5w30 or 10w40 at the most. clearances are tighter than some others run though aswell.
typo... the OP is at 40-45 at 6000rpm...set up by Dave Ebbert, he is also the one who recommended the Royal Purple. Motor runs fabulous.
typo... the OP is at 40-45 at 6000rpm...set up by Dave Ebbert, he is also the one who recommended the Royal Purple. Motor runs fabulous.Dave's a good engine builder, but that would bother me...the 40-45 part, Royal Purple or not. 50wt is costing you power.
35-40 psi at 6000rpm isnt what id like to see. who recommended the 50w oil? ive had great luck with royal purple, but i also run 5w30 or 10w40 at the most. clearances are tighter than some others run though aswell.The type of oil you're going to use definately plays a part in deciding on clearances. It's also good to know what oil temp you'll be running for the same reason.
Hey Guys
Question.....a brand new Merlin crate motor....572, 725 horse, naturally asperated motor.....what is "normal" for oil pressure? From 2,000 RPM and above it runs a constant 50 PSI....at idle, and below 1,500 RPM, it runs about 17 to 20 PSI. I am running straight 40 W oil.....and the max oil temp I am seeing is about 230 to 240 degrees. It has a 12 quart pan.....Is this normal??
I am running a recently rebuilt 454, Mk-IV. Bearing clearances are on the wider 1/2 of the factory specs.
STOCK OIL PUMP!
54PSI cold idle.
58PSI WFO, for MILES AND MILES, 5,000 RPM (5,400 RPM on nitrous)
23PSI HOT, at idle, after those miles of WFO running, or tubing kids for a few hours.
I do not know my oil temp as I do not have instrumentation for that installed yet.
5 quart oil pan, filled with 5 quarts of Castrol 20W-50 Syntech 100% synthetic (not blend).
Your pressures look just fine to me.
Hey Guys
Question.....a brand new Merlin crate motor....572, 725 horse, naturally asperated motor.....what is "normal" for oil pressure? From 2,000 RPM and above it runs a constant 50 PSI....at idle, and below 1,500 RPM, it runs about 17 to 20 PSI. I am running straight 40 W oil.....and the max oil temp I am seeing is about 230 to 240 degrees. It has a 12 quart pan.....Is this normal??
I like the 10 psi for every 1000 rpm rule, however the fact of the matter is that I have rarely had a motor that meets it at high rpm. I could not count the times I have looked down and seen 35 psi @6000 RPM. I dont like it, but thats what happens when the oil gets hot. Who knows if its from heat, areated oil, sucking the pan dry, or whatever.....Never have been able to pinpoint it.
Those pressures are similar to what I see in my boat.
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