I heard that you need to have one if you have a ball bearing turbo is this true and what will happen if you are not running one.

 

if you are running a bigger turbo you can just get a relocation kit from FP or build your own. With that said when you relocate to the oil filter housing you will receive 110 psi of oil pressure (i think) then you would need a reducer so that you dont blow out you seals.

 

you need a restrictor for any ball bearing turbo. Because they don't rely as heavily on the oil for cooling as journal bearing turbos do you need much less of it. People say you can damage the seals if you are not using one, I have not seen this yet but I am not saying it can't happen. In most cases anymore ball bearing turbos come with a restrictor in them so it really matters on what turbo you get.

I would not recommend supplying a BB turbo from the filter housing.

 

It's not because the journal bearing turbos use the oil for cooling as much (most new ones anyways), it's because a ball bearing just needs lubrication, it doesn't actually need oil pressure to form a thin film of oil between the bearing like in a journal bearing turbo. So you only need a few pounds of pressure to keep the turbo happy, and anything after that can potentially pressurize the seals, as well as slow turbo spool-up.

 

Good point. I have just seen what happens to a journal bearing used with a ball bearing restrictor....its not pretty