High oil pressure?

TinSoldier 3215 · 06-23-2011, 09:07 PM

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?

Is oil to heavy? Thanks

TinSoldier 3215 · 06-23-2011, 09:30 PM

Thanks James!!!

John Dinkel · 06-23-2011, 09:35 PM

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

Alan Roehrich · 06-23-2011, 09:36 PM

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

TinSoldier 3215 · 06-24-2011, 05:48 AM

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?

Mike Taylor 3601 · 06-24-2011, 02:25 PM

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

Ed Wright · 06-24-2011, 04:20 PM

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.

BlueOval Ralph · 06-24-2011, 04:50 PM

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.

Quote:

Originally Posted by Ed Wright

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.

Ed Wright · 06-24-2011, 09:21 PM

Quote:

Originally Posted by BlueOval Ralph

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.

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.

TinSoldier 3215 · 06-25-2011, 10:01 AM

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

06-23-2011, 09:07 PM	#1
TinSoldier 3215 Member Join Date: Jul 2009 Location: Bulington, Ky Posts: 359 Likes: 0 Liked 6 Times in 5 Posts	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? Is oil to heavy? Thanks

06-23-2011, 09:30 PM	#2
TinSoldier 3215 Member Join Date: Jul 2009 Location: Bulington, Ky Posts: 359 Likes: 0 Liked 6 Times in 5 Posts	Re: High oil pressure? Thanks James!!!

06-23-2011, 09:35 PM	#3
John Dinkel Senior Member Join Date: Nov 2005 Location: Pinckney, Michigan Posts: 507 Likes: 396 Liked 263 Times in 68 Posts	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. __________________ John Dinkel 3295 STK

06-23-2011, 09:36 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,090 Likes: 1,534 Liked 1,758 Times in 398 Posts	Re: High oil pressure? Way too much oil unless that's a Cleveland. Even 5W 30 synthetic is plenty. __________________ Alan Roehrich 212A G/S

06-24-2011, 05:48 AM	#5
TinSoldier 3215 Member Join Date: Jul 2009 Location: Bulington, Ky Posts: 359 Likes: 0 Liked 6 Times in 5 Posts	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?

06-24-2011, 02:25 PM	#6
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,361 Likes: 333 Liked 279 Times in 96 Posts	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

06-24-2011, 04:20 PM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	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. __________________ Ed Wright 4156 SS/JA

06-25-2011, 10:01 AM	#10
TinSoldier 3215 Member Join Date: Jul 2009 Location: Bulington, Ky Posts: 359 Likes: 0 Liked 6 Times in 5 Posts	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.