If the new line does not have a restrictor at the turbo, will the oil pressure blow past the thrust bearings at high pressure ie cold start or high rpms.

It wasnt clear if one is necesary or if necessary what size ( maybe slightly larger than the stock restriction ) ?

Thanks ,

Milburn

 

Good job, way to look out Robert! FP ftw!!!!!!!!!!!

 

If I remember correctly, there is still a restrictor in the casting on the feed side of the turbo cartridge itself....

 

+1

 

This is just another example of the "same but different" stuff I've noticed since switching from a DSM to an EVO. As Robert said, DSMers have been running lines like this, even with bolt-on style turbos, for over a decade. I'm surprised it hasn't become commonplace here sooner. I wouldn't even consider spending $1k+ on a turbo and not upgrading the feed line.

 

got mine installed.... ehh, I mean my wife installed it for me, it was that easy.

 

Did you have to yank the manifold to get to the oil feed bolt on top of the center section?

 

no, it can be done without doing that... 19mm, a long screw driver & some patience

but what would I know.. the wife put this thing on for me



n

 

The only time the lack of a restrictor will be a problem is if you build up some crankcase pressure.

My own EVO9 runs about 2psi of vacuum in the crankcase with the valve cover conected to the air intake pipe, and a little over 1psi with it vented to atm. If I plug the valvecover vent I can build 6psi of crankcase pressure, when you get to 3psi or more the turbo will start leaking oil. This doesnt hurt the turbo or "blow the seals" the only seals that get blown away are the ones we shoot to make the turbo assembly lube Such leakage doest damage the turbo, just make a mess. Correct the crankcase vent issue and clean up the mess and you are all good.

 

/golfclap

Well trained wife

 

everyone please repeat after me:

"you cannot blow a turbo seal"

 

Thank you Nils for posting that up, I was just about to get to it today. So when you going to let the wife race it for you too?

 

There is not. The only restrictor in the factory oil feed system is built into the oil feed line.

 

Man I can't believe I've been missing this thread. Glad I found it because this is a great kit and problem solver. I was going to make a new line, but now Robert has made it easy on me. Good looking out as well on the issue. Class act all the way.... Ordering mine on Monday

 

oops