samuel082799 Posted August 14, 2022 Share Posted August 14, 2022 So today I installed an oil pump shim in hope that it would increase my max oil pressure at full operating temps. It didn't seem to change much of anything, maybe a couple psi higher but I'm still not sure that I'm comfortable with the pressure it's operating at. I have a built motor with stock clearance crank bearings and slightly oversized clearance on the rod bearings. I have a 11 mm oil pump and I am running motul 10w40 oil. At idle my oil pressure is 20 to 25 psi, cruise is around 60 to 70, and 8000rpm I'm only making about 60 to 65. I have heard that you should have 10 psi of oil pressure per 1000 rpm so ideally I would like to see 80 psi. I'm wondering if it would be worth it to run a thicker oil like 20w50 but idk if that would be to thick. Just looking for some advice on what I should do next. Link to comment Share on other sites More sharing options...
Max Capacity Posted August 14, 2022 Share Posted August 14, 2022 I'd be more worried about oil pressure at Hot idle. If you are getting 20-25psi at HOT idle, I wouldn't worry. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
silverton Posted August 14, 2022 Share Posted August 14, 2022 Looks like your shim worked according to this chart. Your oil pump is operating normally. Too much pressure can be bad, just FYI. https://forums.nasioc.com/forums/showthread.php?t=1411649 2 Link to comment Share on other sites More sharing options...
samuel082799 Posted August 15, 2022 Author Share Posted August 15, 2022 Ok sounds good 80 psi does seem pretty high, I don't know where the 10 psi per 1000 rpm. I guess If your car only revs to 6000 rpm it makes sense. Thanks everyone! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now