426 oil pressure psi??

I have a 2001 426 that is over-bored to a 450.

I just replaced my oil pump, and am completely confused about what psi the oil pressure should be at.

It shows:

15 with the choke (cold)

5-8 at idle (warm)

15-20 when it's revved

I know that 450's are in the 50-60 psi range, but I think the 426 should be lower. Is that right? Does the over-bore make any difference?

being bored over should not make much of a diff. your oil pressure is built from the pump and how strong your main bearings are. I dont know why the 426 and the 450 would be so different in pressure but it sounds worth looking into.

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 account

Sign in

Already have an account? Sign in here.


Sign In Now