65stang289 said:ok good because I get 60 went I start it but then it drops down to 40psi when it warms up. I dont know much about how the oil thing works.
Thanks
zookeeper said:The rule of thumb used by some engine builders (Smokey Yunick being one of them) is 10 lbs for every 1000 RPM's. Any more any you're wasting power to make excessive oil pressure, any less and you risk engine damage.
Just remember Super Dave's saying-- Good's not Cheap, and Cheap's not Good!!! 40 psi oil pressure at idle is fine.crushnut said:It is a brand new mechanical guage that i installed today. Why wouldn't it be accurate, now you got me worrying
BTW- It is a SunPro guage.
That's for anytime the engine is running, period. Although I've read that on ceratin engines (Ford's SOHC 427 for one) that anytime the oil pressure gets lower than 60 lbs, shut it off to avoid serious damage. Also, big-block Chevys seem to prefer a bit more oil pressure, since they have a tendency to ruin cams with low oil pressure, even though the 427 in my wife's car idles at 35 psi, and has since the motor was new and is doing quite well. But as far as real-world use, and racing use according to Smokey, 10lbs per 1000rpms is fine.crushnut said:Thats for driving, isnt it? What about just at idle?
zookeeper said:That's for anytime the engine is running, period. Although I've read that on ceratin engines (Ford's SOHC 427 for one) that anytime the oil pressure gets lower than 60 lbs, shut it off to avoid serious damage. Also, big-block Chevys seem to prefer a bit more oil pressure, since they have a tendency to ruin cams with low oil pressure, even though the 427 in my wife's car idles at 35 psi, and has since the motor was new and is doing quite well. But as far as real-world use, and racing use according to Smokey, 10lbs per 1000rpms is fine.
Realmongo said:When I worked at a Chevrolet dealer back in the '70s, GM was only concerned with 7# of pressure at idle. Scarry thought, but that is all they required.
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