Quote:
Originally Posted by legavroche
Ronald, curiously my 383 maintains 50 pounds of pressure from start up through to normal operating temperature, any variation is very small! I use 20w50 Valvoline racing oil.
Gavin
|
There's definitely something wrong there. Possibly a faulty gauge.
I just looked up the Plymouth 1966 workshop manual which covers all engines - 273, 318, 361, 383 & 426.
Recommended oil pressure is the same for all engines.
Min 20 PSI at 500rpm
45 - 65 lbs at 1000rpm at operating temperature
(the manual actually says lbs, but I presume they mean PSI)
I suspect the 318 engine referred to is the LA, not the earlier A series engine used in the Bristol 407-410. Not sure how much oil pressure variance there would be between A and LA engines.
Pressure will be higher on new engines, i.e 50 -70 lbs at 1000rpm at operating temp.