High oil pressure?

Ed Wright · 06-29-2011, 12:36 PM

Yes, I mis-spoke about the bypass. I was trying to get my point across. That, there is no need for a high volume oil pump in a SBC. Cleveland Fords? probably so. Why more oil at idle? absolutely no reason. If somebody has better bearing life with 10% or more pump volume, they need to seriously take a look at what they are doing. The old "big block-style" +25% pumps? Are you kidding??
A few of my old roundy-round customers seemed to worry about their oil pressure dropping to 15 psi at idle after running 25 to 35 laps WOT in Oklahoma summer heat (no oil coolers). Thought they needed high volume pumps to "cure" that. They just didn't know better, but you still have to waste time trying to explain something that was evidently over their heads. GM says 10 psi per 1000 RPM, I have found that to be VERY safe, to say the least. All this was before synthetic oil, btw.

06-29-2011, 12:36 PM	#14
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? Yes, I mis-spoke about the bypass. I was trying to get my point across. That, there is no need for a high volume oil pump in a SBC. Cleveland Fords? probably so. Why more oil at idle? absolutely no reason. If somebody has better bearing life with 10% or more pump volume, they need to seriously take a look at what they are doing. The old "big block-style" +25% pumps? Are you kidding?? A few of my old roundy-round customers seemed to worry about their oil pressure dropping to 15 psi at idle after running 25 to 35 laps WOT in Oklahoma summer heat (no oil coolers). Thought they needed high volume pumps to "cure" that. They just didn't know better, but you still have to waste time trying to explain something that was evidently over their heads. GM says 10 psi per 1000 RPM, I have found that to be VERY safe, to say the least. All this was before synthetic oil, btw. __________________ Ed Wright 4156 SS/JA