High oil pressure?
 

Found out that the oil pressure with 20/50 wt when rev engine goes to more then 90 pounds also heavy spring in oil pump?:confused: Is oil to heavy? Thanks

Re: High oil pressure?
 

Thanks James!!!

Re: High oil pressure?
 

Why are you using that heavy oil? Try 10W-30. You don't have a top fuler do you? Use synthetic racing oil.

Re: High oil pressure?
 

Way too much oil unless that's a Cleveland. Even 5W 30 synthetic is plenty.

Re: High oil pressure?
 

No Top Fuler, Would not have one of those oil down track junk!!!! Its a bracket car 400 small block 10.20 at 131.89 at wt 3160. Thanks Guys, You all are the Best!!! What wt of oil do you all like?

Re: High oil pressure?
 

I'm guessing you have HV pump with about .0015-.002 bearing clearanceGo to 10-30 or 20 may lower when warm. 90 lbs won't hurt anything besides taking a little power or worst case wear dist. gear. If oil does'nt drop psi enough to suit you change spring or pump.
I've been using 10W30 and 20wt for a long time.
Mike Taylor 3601

Re: High oil pressure?
 

I don't know why they even make high volume oil pumps for the sbc. Absolutely no need for them. But, if you make them somebody will buy them.

Re: High oil pressure?
 

Ed:
I know for a fact that Fadely & Edwards ran HV + HP Fadely had a supply of the old trans-am oil pump springs with a .125 shim = 85 to 90 hot and Pennzoil 20-50, I had the deep rotor (from 534 Ford Truck engine) covers machined at one of the Ford Machine shops. The 351-Cs need alot of pressure.

Re: High oil pressure?
 

But, those were Fords. And sbc = Small Block Chevy, which has a great oiling system, unlike the early Fords. Myself, and many others building small block Chevys use the STD volume pump, modified for LESS volume. I also limit mine to 40 psi @ 8500 RPM. Bearings always look like new. Just replace them when I start to feel guilty about running them so long. If you ever build a sbc, call Larry Stewart Sr about buying an oil pump.

Re: High oil pressure?
 

I'm going out to the shop and put in the 5/20 wt and see if that does the FIX.