Originally Posted By: used_0il
I'm glad someone else mentioned 90 psi on small block Fords, I chickened out.
Some Cleveland owners are stretching the pump spring or shimming it to 100 psi......."
I am in the longtime habit of driving my vintage Shelby Mustang(s) equipped with a vintage Paxton supercharger, and my '65 HiPo Mustamg K code in high speed endurance races. Typically you are redlining, going flat out in top gear (4th for me) for about 130 miles, or until your gas tank runs dry.
The last thing I want to be thinking about is lubrication issues. Small block Fords certainly can be ran normally on normal oil pressure without any issues. But for extended high rpm usage, especially with the 289 engines, they will thrive on high oil pressure. Yes you do lose 3 or 4 horsepower by running 80+ psi . But that is about the only drawback I know of. Of course, oil pump shafts need to be upgraded.
High volume pumps with their increased flow, are much better at removing excess heat from the main and rod bearings than a conventional pump with lower pressure and volume.
I use mobil 1 15w-50 in the summer, and most of the year, 0w-40 when the air temperature is below 30 F.
Z.
I'm glad someone else mentioned 90 psi on small block Fords, I chickened out.
Some Cleveland owners are stretching the pump spring or shimming it to 100 psi......."
I am in the longtime habit of driving my vintage Shelby Mustang(s) equipped with a vintage Paxton supercharger, and my '65 HiPo Mustamg K code in high speed endurance races. Typically you are redlining, going flat out in top gear (4th for me) for about 130 miles, or until your gas tank runs dry.
The last thing I want to be thinking about is lubrication issues. Small block Fords certainly can be ran normally on normal oil pressure without any issues. But for extended high rpm usage, especially with the 289 engines, they will thrive on high oil pressure. Yes you do lose 3 or 4 horsepower by running 80+ psi . But that is about the only drawback I know of. Of course, oil pump shafts need to be upgraded.
High volume pumps with their increased flow, are much better at removing excess heat from the main and rod bearings than a conventional pump with lower pressure and volume.
I use mobil 1 15w-50 in the summer, and most of the year, 0w-40 when the air temperature is below 30 F.
Z.