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Is 30Psi at idle normal?

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Old 04-16-2006, 12:15 AM
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Default Is 30Psi at idle normal?

My c5 i just picked up when i come to a stop and sit there drops down to about 30psi for the oil, i thought it was supposed to be around 40. I just want to make sure that this is not a problem because if it is id rather do something about it now

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Old 04-16-2006, 12:17 AM
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You have a ported pump? Some of the older SBC's and BB's would idle with 8-10 psi.
Old 04-16-2006, 12:28 AM
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I dont know its a 97 with a stock pump ( im assuming? ) I just wantt o make sure that its normal and i dont have an oil pressure problem
Old 04-16-2006, 12:34 AM
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What is pressure at full throttle? 50-55
If you took off the pump and put it back on you could have messed up the O ring on it causing the lower pressure that you are speaking of.
Old 04-16-2006, 12:40 AM
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That pressure is fine. Mine is at 32 with the warm houston weather of late. Was 40+ in the winter.
Old 04-16-2006, 12:48 AM
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yeah. Essentially I was telling you that it was ok.
Old 04-16-2006, 12:56 AM
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Mine is at 30-35psi at idle but 40+ at WOT...
Old 04-16-2006, 01:34 AM
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Exactly mine get to 60psi at WOT....
Old 04-16-2006, 08:11 AM
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Ok cool yeah at cruising speeds it sits at about 40-45psi and at wide open throttle it shoots to 60


Thanks i was worried
Old 04-16-2006, 11:15 PM
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It is normal Actually, some of the C5 guys over on corvetteforum have reported seeing ~20psi at idle It was like that the whole time I owned it, and I never had a problem with it. You should be fine
Old 04-17-2006, 09:27 AM
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Sounds normal. How many miles on the engine?
Old 04-17-2006, 09:33 AM
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Most engines only need 10 psi per 1k rpms. So if you idle at 600 rpm you would technically only need 6 psi. I know that is awful low but that is the way of it. But at 6k rpms you should see about 60. This is all just general rule of thumb but if you use this as a guideline you should be AOK.




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