Can anyone please clarify. The stock turbos have oil restrictors in place. From what I understand the drivers side is restricted in the oil sender block and the passenger side is restricted by the bolt which is marked K. Is this correct??

Hi Stephen, yes you are correct.

If you going to upgrade to ball bearing turbos you are going to have to drill out the restrictors in both those areas to allow full oil flow to the upgraded turbos.

Thanks yeah I was just checking. I would appear I'm missing the bolt labeled K. Both are unstamped.

Thanks yeah I was just checking. I would appear I'm missing the bolt labeled K. Both are unstamped.

 

not having the K bolt can overfill your turbo cartridge faster than it can drain Steve...smoke issues thereafter;)

Exactly than my mucker. I never removed the passenger side bolt, no need so I couldn't of "mixed them up" however it would appear at sone stage it's been done and only now have I noticed, as I've never had to check.

Interesting . Any pics where is that bolt ?

On the engine block is a 90 degree block, it's near the bell housing bolts level with the exhaust housing of the turbo. The drivers side turbo bolts a banjo to it, it should have K on it.

On the engine block is a 90 degree block, it's near the bell housing bolts level with the exhaust housing of the turbo. The drivers side turbo bolts a banjo to it, it should have K on it.

 

my last engine build i found i had not one..had to buy one off Mark Derby. There is a big difference in hole size

Yeah it's about half the size if not smaller. I'm currently chucking 90psi at the turbo at times...great.

Yeah it's about half the size if not smaller. I'm currently chucking 90psi at the turbo at times...great.

 

its actually the larger volume of oil more than pressure Steve thats the problem

That's a fair point bri although I suppose they are interlinked. Pressure and flow rate vs apature size.

That's a fair point bri although I suppose they are interlinked. Pressure and flow rate vs apature size.

 

Given your trade Steve and what you do every day of the week ime not going to argue over flow rate versus pressure rates in flowing liquids:D;)

Building it, that's the simple bit. Fixing what happens after the human error effect is introduced is fun bit.