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Hi just wondering what oil prssure you have.

New motor RB30/25, RB25 oil pump, RB25 oil feed restrictors in the block. 110psi cold with 20W-50 garbage oil for run-in. Haven't got much oil temp in it yet to see if it goes down. Does anyone else get high pressure cold? Has anyone experienced by-pass valves sticking in the pump? The pump was pulled apart and looks to be in VGC before install.

Please help. Thanks.

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On my RB25DET I get between 7.5 Bar (108 Psi) to 8.0 Bar (116 Psi) on a cold start, drops to 2 bar at idle when it's up to working temperature. So 110 Psi (7.6 Bar) is good oil pressure for a cold start :) I'm using 10W40 Motul 300V Synthetic oil.

Edited by PlasticStan

You guys made my day!!! I was just about to pull the sump off and I really wasn't looking forward to it!

The gauge is TEMPORARY for tuning- autometer pro comp liquid filled mechanical gauge (not that it makes much difference) and i bled it properly.

I might try and get some thinner oil to start with now to drop it a bit. Thanks.

2 thou bearing clearances and a 10w30 oil

If you have more oil pressure than above then there is something wrong....unless you have set it up for those pressures.

Plus if you read the manual it will tell you similar figures.

BTW...nice attempt at sarcasm but those figures are accurate. Even with an N1 oil pump you shouldn't expect any more than 80-90psi cold start.

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