oil pressure on a 440?

charger01 · Post by **charger01** » Sun Nov 27, 05 9:08 pm

whats classed as good oil pressure on a 440,mine is 65lbs-70 when i start up & about 45-50 ish ticking over warm,Ive been told this is too high & it should only be 45-50 lbs on start up,(engine runs well,not had any problems) any views on this?

Alex · Post by **Alex** » Sun Nov 27, 05 9:11 pm

Sounds good to me, mine makes 95 if I rev it cold ! hot it is 45 at idle, cold 70, that is fine, trust me.

charger01 · Post by **charger01** » Sun Nov 27, 05 9:22 pm

Cheers Alex,might be a stupid question to some but its always best to put up your hand and ask

Alex · Post by **Alex** » Sun Nov 27, 05 9:54 pm

95 is a tad too much LOL but I don't care! Yours seems on the money

Rich · Post by **Rich** » Sun Nov 27, 05 10:24 pm

Would those figures be about the same for a small block Alex.Yours seen very near to mine,only 85 if I rev cold.

Alex · Post by **Alex** » Sun Nov 27, 05 10:28 pm

Yeah a good small block will make those figures or close, under 90 is cool, over is pushing it a bit, I let mine warm right up before I push so the pressure drops as it is on the filters limit really!

The general train of thought is 10 psi per 1000 rpm, anymore is a waste of horsepower!

Rich · Post by **Rich** » Sun Nov 27, 05 10:39 pm

Thank you..

MilesnMiles · Post by **MilesnMiles** » Mon Nov 28, 05 5:59 pm

I was interested in correct pressure after installing my rebuilt 360. One of the US Mopar mag articles said they were happy with 30psi at idle and 60 at cruise speeds, they indicated that 90+ was a touch high.
Mine sits at 30psi@750rpm, jumps quickly to 40-50 at 1,000-1200rpm and sits at 60 at cruise speeds. All figures are for hot motor and (new) standard oil pump.

Anonymous · Post by **Anonymous** » Mon Jan 16, 06 11:10 pm

Another question then chaps...

On start up my engines oil pressure sits around the 60 mark.
After driving for approx. 25 - 40 mins the pressure drops down to about 35.
Now all this tallies with what has already been said...... but.....

After another 20 - 30 mins there is almost a complete loss of pressure ( literally drops below 10) but will pick up if revved slightly, but then drops again.

have changed oil and filter. oil level is ok. any ideas

Thanks in advance

Guy · Post by **Guy** » Mon Jan 16, 06 11:58 pm

Sorry to say but it sound like the bottom end has got to come apart

MilesnMiles · Post by **MilesnMiles** » Tue Jan 17, 06 12:27 pm

When my 318 did that the bottom end had departed. I have to say that the audible knocking from the botom end gave me plenty of advance warning. Are there audible noises from the motor e.g. dep down knocking etc...?

Anonymous · Post by **Anonymous** » Wed Jan 18, 06 2:59 pm

no noise at all.

Jon · Post by **Jon** » Wed Jan 18, 06 3:15 pm

I'd have a look at the pump before steaming in and pulling the engine to bits though

MilesnMiles · Post by **MilesnMiles** » Wed Jan 18, 06 7:30 pm

Thinking of what Jon said, is it worth checking the relief spring in the oil pump?