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constructionsarge 07-02-2012 12:47 PM

small block oil pressure
 
just put in new cam and lifters with new oil pump in my 283 i have high oil pressure of 50lbs at idle. it is a stock pump i think it is too high ?

327NUT 07-02-2012 01:39 PM

2 things.....are you sure it's a stock pump like an M-55 and what weight oil are you using....and I hope you used a good oil with an additive and proper cam break in procedure. No offense meant, just asking.

constructionsarge 07-02-2012 04:57 PM

oil pressure
 
30 wt. for a 100 miles with addatives

327NUT 07-04-2012 12:26 PM

Sorry, been away for a while, by the text of your story I'm assuming that this is not a new build but just a cam change etc. If it was a new build then I would ask you how tight your clearances were...but that's not the case. I did ask you about the oil pump but got no answer. Are you sure it's not a high pressure or high volume/high pressure pump.

Not likely but there could have been a mix up at the mfg. When I first fired my 331" sbc with a Melling M-55 standard pump and 30 wt. Rotella I got 80 psi with cold oil @ 2500 rp. After the cam was broken in it would come down to about 30 psi at 800 rpm. Did the pump box contain a light purple spring that you could change out for increased oil press? Who knows, maybe that spring is in the pump instead.....by the way what's your psi at 2500?


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