OIL Pres Question
 

If a sbc has 12 pounds at idle hot (700rpms 180 deg) and 30-35 cruising (14-1600 rpm) and 50 anything over 4k does this make it bad. The motor is new and yes at a idle I would agree it is low(but its a chevy)when its hot but in no way do I think the motor is hurt. as I was always told 7 psi per 1000 rpm is min and fine. The thing runs drives sounds great. Also I could turn it up to 900 and it sits at 20 at idle.

if you do not drop below probably 5 lbs at idle you should be ok.

Is it a stock oil pump?

Also if it matters it has a relocated oil filter with big bradded lines that I was told could also lower the pressure trying to puss the oil threw them big lines #6 bradded lines over 5ft each.

yes stock oil pump

I think your ok at 12lbs.

If I am wrong I know one of the guys will jump in and save the day :D

#6 braided for remote mount, is too small. Minimum should be #10

Would that cause it to be low and also it is 8 not 6 I ment #8. But still is that to small and would it cause that. Im not worried really because it runs and drives great with no prob and sounds great no noise but I had a guy come look at it to buy it and he thought it was to low and did not buy it only for that reason only. Hell I even dropped our agread price 2k right there just incase there was a prob and 2k would cover it. But its brand new and I just want other oppinions

Thanks.

LOW OIL PRESSURE AT IDLE ON MOST CHEVIES IS NOT A PROBLEM JUST AS LONG AS 35-40 POUNDS IS ACHEIVED AT CRUISING SPEED--AND IT DOESN'T FALL OFF ABOVE THAT--MY SBF RUNS 15- 20 AT IDLE AND 40-50- AT CRUISING SPEED AND I HAVE OVER 100,000 MILES ON IT WITH NO PROBLEM--GOOD LUCK AND HOPE YOU GET IT SOLD AND IT WAS GREAT YOU WERE HONEST WITH THAT BUYER 8) :lol:

If the engines new I would definitely change the oil filter as this may be the cause of your low pressure. :!:

If it's a Fram, loose it and get a Wix ! 10 lbs per 1000 RPM is a good general rule.

I agree... filters can have an effect on low oil pressure. A simple brand change can get you an increase depending on the check valve & spring pressure in them. Double-D is right (check the Fram Filter Thread). 12lbs is probably ok... I have heard the 10lbs for every 1000RPM rule too. Here is my question: why so low of pressure on a new SBC??? What kind of pan set up/oil pick-up & oil pump? It just seems a little low for a fresh engine. Not to worry- you are getting correct pressure at over 4K though. JMO Rigsby

He's pushing oil through 10 FT of hose, so that is where his low rpm pressure drop is happening. Once he spools it up the pump starts making up for it.

I agree with above 10psi per 1000 is the general rule of thumb and yours is in that range, I like more than that especially in a high performace motor but from what I gathered yours is mostly stock trim so you'll be fine.
Also have you checked the pressure with a manual guage or against another known gauge? Your gauge or sending unit could be off a tad.
And what weight oil are you using? Switching to a 20w50 will bump it up if your using a 10w40 or 5w30 oil. Just a thought.
Goodluck, Cp