strange oil pressure
Thread Starter
Teching In
Joined: Jul 2009
Posts: 21
Likes: 2
strange oil pressure Actually I have a Problem with the oil pressure.
Some facts:
I installed the new Ysi-Blower with the New head gaskets . After the mapping ( some dyno runs ) i recognised that there is something wrong with the oil pressure.
Before installing the new Blower I had always between 35 and 50 psi.
Engine : LS1 stroker
Blower: Ysi - 1,1 bar at 6500rpm - pulley 3,35"
Oil: 10W60
Cold at idle: 43 psi
Warm at idle: 11 - 15 psi
Crazy is that when I speed up the oil pressure goes down from 35 to 25 psi and than when I go away from the trottle the pressure goes back to nearly 40psi and than slowly to 30.
Also in parkingposition with in P if have 15 psi but in D if have only 11 psi.
Oil and filter is New !!
Any ideas ?
regards
Harald
Some facts:
I installed the new Ysi-Blower with the New head gaskets . After the mapping ( some dyno runs ) i recognised that there is something wrong with the oil pressure.
Before installing the new Blower I had always between 35 and 50 psi.
Engine : LS1 stroker
Blower: Ysi - 1,1 bar at 6500rpm - pulley 3,35"
Oil: 10W60
Cold at idle: 43 psi
Warm at idle: 11 - 15 psi
Crazy is that when I speed up the oil pressure goes down from 35 to 25 psi and than when I go away from the trottle the pressure goes back to nearly 40psi and than slowly to 30.
Also in parkingposition with in P if have 15 psi but in D if have only 11 psi.
Oil and filter is New !!
Any ideas ?
regards
Harald
Registered User
Joined: Apr 2015
Posts: 18
Likes: 0
From: Wimberley
I have been having the same issue.. You have probably created too much crank case vacuum. You need to re-work your pcv system so that it only has about 4 inches of vacuum... If you have too much crank case vacuum (the oil pump and intake vacuum pulling from the same area) will cause a drop in oil pressure...
Myron
Myron
