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Old 09-03-2003, 09:16 PM
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too high of oil pressure?

when I first start my car my oil pressure is at 75psi thats at 1000 rpm when warm and in idle im at 50 psi thats at 600 rpm, if I get on the gas im back to 75psi by 2500 rpm. at 3500 or so im almost to 100 psi, I am running the pump summit sends in thir engine rebuild kits, its a high volume pump and I have the hardend shaft running it. will this high oil pressure hurt any thing at high rpm or rob any power? the engine is a 355 chevy. should i put a weaker spring it the pump? if any thing else is needed ask. thanks for your help. p.s. im betting the first that will go is the oil filter gasket any other bets?

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Old 09-03-2003, 09:43 PM
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First thing I`d do is check it with another gauge to be sure this was the oil pressure, but yes, it`s kinda on the high side, I`m running the same pump and got it in the same kit and my oil pressure is no where near yours. high volume pumps are really not needed on a small block chevy with the right running clearences, this is also due to them having a excellant oiling system, and yes, high volume pumps rob more power to drive them.
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Old 09-03-2003, 10:18 PM
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A good rule of thumb (or at least a starting point) is 10 psi of oil pressure for every 1000 rpm. You can have more than this depending on the motor and its components, but you don't want less...
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