Turbonetics oil feed.. Help!!!

[91DSMdave]

Hey guys, i have a question.

90 Laser
External Oil cooler setup (Godspeed, larger lines and cooler)
Unported OFH
Balance shafts removed

I will be installing a Turbonetics 50 trim. I have the oil feed line from extreme psi: EXTREME PSI : Your #1 Source for In Stock Performance Parts

I have done a lot of searching about whether or not i should restrict the oil to the turbo, and I'm thinking i want to, just to be safe. Now if im not mistaken, this turbo has a PTE/Garret style center section, correct?

So what do i need to restrict this turbo with my current line?

 

[turboglenn]

Yea, you have a garret style center, and actually the DSM crowd is the only one i've seen with so many turbo failures and so stressed about the exact feeding of a turbo (honda guys kill theirs most of the time by neglect IMO, but measuring outlet flow as I've always done has never failed me on an install yet)

Here's what i did to mine (t3/t4 t-netics adn garret parts 57 trim), I took the 1g head feed and cut it short from the head and left the banjo and about 3inches of solid metal line on there (worked out good since it has the hole the size to restrict it for the stock setup), then i had a shop make me a -3 AN line with a compression coupler on one side and hooked into the orignal feed tube and still was able to run stainless braided line to the turbo with a male 3an installed in the CHRA

i've put 120k miles on this turbo and although the fins on the inducer of the cold side show it with wear, the bearings are still perfect as the day i put it in. I didn't know that the tube had the hole for restriction when i did it back in 2002, and did it that way mainly so i could use the original fittings instead of trying to cram pipe thread in a hole that's not NPT and when i tested the oil the way majestic taught me it passed that test and has lastedand lasted. I've never had a turbo problem out of any car i've put a turbo on and all i've ever used is that that test to determine if we were ok or not..

You measure the volume out of the return to a cup over a certain amoutn of seconds and if it's in there you're good.. (supposedly when the volume is right, there's not enough oil going to it NO MATTER THE PRESSURE, because it's draining faster than the line can fill the big open feed area in the CHRA, so pressure at the tuirbos bearings won't build up and hurt anything and it's worked for me for years without checking pressure and flow and worring about what most people deal with on DSMs (but i also don't mess with ball bearing turbos much as most people i know except one don't feel theyy're worth the extra $$'s) if you go to the majestic site and read up on their guidelines you'll be fine if you follow that. Or just install from the head the same exact way i and for the most part unless there's some underlying difference in our engines oil feed you should be fine..also i have run this wy on both my old engine with balance shafts and my new one with the eliminator mod done and the head feed with banjo must be metering it becayse even though i have more oil pressure at the OFH, the return line check showed within spec and it's still been fine

I have ZERO in an out play, and only the side to side that was in it when i assembled it and it's made from all turbonetics pieces and still has the "T" on the exhaust housing, (i polished the front one and had round it off)



and alhough i built it at majestic when I finished the aprenticeship i was taking to work there (before i could get the pay i needed to move to texas i had to prove i was worth it so i went down and worked for free to learn the ways of the old owner Kevin)

 

[JusMX141]

If your turbo has the 360* thrust plate, oil it from the filter housing with a restrictor to keep the pressure under 70psi.

If your turbo has the 270* thrust plate, oil it from the filter housing with a restrictor or head unrestricted.


The 360* thrust plate causes too much of a parasitic drain for head-fed turbos, robbing the amount of available volume and pressure from the journal bearings.

In either case, make sure your oil drain is large enough to work effectively. Most aftermarket oil drains available for Garrett turbos on our cars are smaller than the stock hardware.