Quote:
Originally Posted by Ed Wright
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.
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Ed
I didnt mean to step on your toes, but I havent seen people use 10 psi for 1000rpm and apparently you dont either by your posting as above. Carl and I was just saying there is several ways to get to the oil issues of motors. I have found that a SBC only needs 4.5 gpm and a ford needs 6.5 gpm but every once in a while you get an engine that is an anomaly and for what ever reason needs slightly more. I have always felt that Melling and several oil pump companies are pretty good business people. I have no idea why they built a HV pump but I am pretty sure they knew what they were doing. I can purchase a HV pump for about the same price as a Std pump on my WD account and I lower the spring pressure even more so I dont bang on the unloader all the time. I have always felt that oil is as much a coolant as water and you can get clearances so tight that you do not get volume or at least not enough to carry off the heat and also I feel you want enough pressure to create the hydrodynamic wedge that you need. Many factors go into how much oil you need etc, width of bearing, compression ratio, normally aspirated or not. I have found turbo motors with boost like volume but it doesnt mean you have to flood, just carry the heat off.
Sorry didnt mean to toe step Ed. Just expressing an opinion