So in the upper RPM's, my H22A1 maxes out at 75 psi oil pressure.......anything more than 60? psi will blow the seals on a ballbearing turbo, so what do I do to get the pressure on the line going to the turbo down to under 60 psi? I know a couple others here are running GT's, how did you do it?
Thanks!!!
Brian

 

You need to put a restrictor inline to the oil feed to the turbo. I was told need the actual before oil pressure going to the turbo then get the correct restrictor then retest oil pressure. I am planning on doing this on my new tubo also, I was told approx 40psi is all that is needed.

 

Where can you get these restrictors at?
Brian

 

Here's the deal, you're running a -3AN line to the turbo right? On my setup, I had a -3AN line and a -3AN to 1/8 NPT male/male adapter on the block oil pressure sender tee. I took the -3AN to 1/8 NPT Earl's adapter and tapped the inside of the NPT end with an M6 tap. Then I took and M6 bolt and screwed it in tight, bottomed it out in the threads. Then I ground the bolt head off flush with the fitting and drilled a 0.078 inch hole through the bolt. Voila. If you start off small, like 0.040" you can tailor the pressure at the turbo to whatever you need.

 

Great idea!