vacuum 6
Well-Known Member
- Joined
- Jan 6, 2006
- Messages
- 2,401
Does anyone have this mod done to their motor?
"Oil pump:
We always recommend a rebuilt oil pump and thrust plate with a minimum of 60 PSI @ 3000 RPM. We like to see 20 PSI @ hot idle in gear, but even 10 PSI is acceptable. Remember, the oil pump must create enough pressure to push oil into the center of the main journal & then out to each respective rod bearing journal while centrifugal force is trying to push the oil back out from the center of each main journal. If your pump lacks adequate pressure and volume, your rod bearings may starve for oil! In the case of the V6, we recommend using one of the available rebuilding kits with the new thrust plate. Keep in mind that the oil pump is supplying oil to the engine as well as the turbo, so upgrading the pump is really mandatory on these engines.
In high performance street/strip motors, we suggest "blueprinting" the oil pump and timing Cover passages. Smoothing, deburring and enlarging passages will dramatically increase oil flow to your bearings in these engines. Specifically focus on the pump cover outlet (the rectangular slot) and the passage into the block (open to 1/2", 9/16" in race applications). Race applications will benefit from an external oil line running from the turbo oil supply fitting to the passenger side lifer oil galley in the rear of the block. The reasoning behind this external line is simple; you increase volume and pressure to the rear main and rod bearings because oil is now supplied from both ends of the oil galley rather than just from the front as is the case with the stock arrangement. Where the turbo feed fitting exits the block (front, passenger side) the block must first be drilled to 9/16" to the cam bearing then drilled 1" deep using a 19/32" bit, then threads tapped to 3/8" NPT to accommodate the new fitting and 3/8" external line.
In all out race engines, you should consider running an external oil pump, bypassing the front cover pump."
