dustkrock
10+ Year Contributor
- 43
- 0
- Mar 30, 2009
-
mcdonald,
Pennsylvania
I recently purchased an obx green 20g Turbo. I was wondering what would be the best route for my oil feed line and if I should run a restrictor?
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you will find mixed reviews on that but most people are liking to feed from the OFH (oil feed housing) directly and if need be put in a restrictor. If i remember correctly MHI turbos like higher oil pressure so no need for a restrictor.
i understand usually the knock offs are attempted de-engineered builds. How much did you pay for it? I currently have an older style green in perfect condition and am thinking of upgrading. I would always go from the OFH and restrict. Cleaner cooler oil comes from there!
Most OBX products are made cheaply and not correctly... Don't get me wrong, they do make some things worth using. However, I would NEVER use their camshafts or turbochargers.
There is zero good stories of OBX turbos working well. Their manifolds are usable, however their camshafts will fail quickly along with the turbo units. There are soooo many engineering aspects of the OBX turbo that is wrong, which will cause the turbine to eat into the housing fairly quick.
Like I said, if possible, return it before you use it... Get as much money back as possible.. There are several MHI 20G's for sell on this forum in the classifieds for a good deal.
Curious as I know next to nothing about cams. How can it fail? Is it due to bad metal alloy? How does the turbo fail as well? bad specs in the build?
100% wrong. You should never exceed 48psi at the inlet on a MHI turbo.If i remember correctly MHI turbos like higher oil pressure so no need for a restrictor.
Better let Mitsubishi know that so they can remove the restrictor from the OEM head feed line on all 1G 14B turbos as well as Evo VIII and IX 16G's.You don't restrict journal bearing turbos.
ya.....you do, ever heard of PTE journal bearing turbos going bad from too much oil pressure? Or how about Holset turbos. All of those are JB turbos and absolutely require restriction of the oil feed
A 4g63 with balance shafts and oil squirters should do fine with a -3 feed line from the filter housing. . . If running no B shafts, a restrictor neccesary to run any journal bearing t-netics/garrett will be fine for a holset. I don't know what restrictor that may be. I just know that garret journal bearing turbos and holset turbos require very similar oil pressure.
100% wrong. You should never exceed 48psi at the inlet on a MHI turbo.
Better let Mitsubishi know that so they can remove the restrictor from the OEM head feed line on all 1G 14B turbos as well as Evo VIII and IX 16G's.
You don't restrict journal bearing turbos.
it depends if balance shafts have been eliminated.
from a wiseman in another thread
i stand corrected haha
I stand corrected too
glad this was brought up or I would have a dead holset on my hands
Actually, I have none to offer.I'm sure Justin has had some form of experience with an OBX unit from either a customer or personal experience.
Not just a Holset but a turbo of any brand for that matter. You absolutely need to abide by the oiling requirement for any aftermarket turbo you install if you want it to last.glad this was brought up or I would have a dead holset on my hands
It's never fun to have something like that happen... I always recommend triple checking information from a reliable source when it comes to an important thing like this. Most people don't even know what a restrictor is, let alone what their proper flow to the turbo should be.
A journal bearing turbo's oiling requirement hinges on it's thrust lubrication system. MHI turbos have a single 1/32" oiling hole in their thrust plate while Garretts have two giant 3/32" oiling holes. The larger the hole in the thrust system, the more parasitic drain there will be on the inlet pressure and available oil flow for the journal bearings.
If you upgrade the thrust system in a MHI turbo to a plate with two larger oiling holes, then you should consider moving the oil feed to the filter housing with a restrictor in order to get the additional oil volume needed to keep the cartridge well-lubricated, still keeping the pressure below the required 48psi max.