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Questions for Justin...

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Hi Justin,
I want to install a downward looking compressor housing on my EVO 3 turbo. According to a quick research, Subaru STI used a MHI 16G with the housing I want. I could not find any reputable vendor that sells it but I found this on Ebay

evo 3 compressor housing | eBay

My question is: Do you know where I can buy a genuine MHI 16G downward looking compressor housing ? and if not do you know if the one on the link is a good replacement to an MHI housing.
I am aware that I will have to fabricate a set up for the waste-gate actuator and I don't mind doing that.
Thanks for this great thread.
 
I know what you mean, Donnie- but that's often difficult to describe to someone who isn't familiar with both types...and there are just too many different knockoffs circulating the globe to definitively state "here's a Genuine MHI wheel and here's a knockoff".

For example, this knockoff 20G which I rebuilt for a customer a while ago appears to have straight major blades and swept minor blades. At first glance the wheel is a pretty decent MHI clone...better than some I've seen:

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Do you know the flow difference between the knock off 20g wheel and the MHI 20g wheel?
 
Last edited by a moderator:
hey Justin you seem to be the guru, how should I go about verifying my oil feed line pressure for the BEP s258 I have? I order it 3 years ago (hard time finding receipt from who) with feed line it just seems a bit small approx 1/8", the fitting looks like -4AN but the feed line is slightly smaller. I'm mainly concerned about too high or low pressure and coking the oil lines from hot cool downs

Since this is oil cooled only should I think about a turbo timer? or external oil cooler/oil temp gauge?

Thanks for your time -Chris
 
Hi Justin,
I want to install a downward looking compressor housing on my EVO 3 turbo. According to a quick research, Subaru STI used a MHI 16G with the housing I want. I could not find any reputable vendor that sells it but I found this on Ebay

evo 3 compressor housing | eBay

My question is: Do you know where I can buy a genuine MHI 16G downward looking compressor housing ? and if not do you know if the one on the link is a good replacement to an MHI housing.
I am aware that I will have to fabricate a set up for the waste-gate actuator and I don't mind doing that.
Thanks for this great thread.

Hi Justin, I hope you would help on this one!
 
hey Justin you seem to be the guru, how should I go about verifying my oil feed line pressure for the BEP s258 I have?
You need to rig up something to test the pressure between the filter housing and the turbo; add restriction as needed to keep oil pressure in the region of 65-70psi peak. Don't over-restrict as it may cause more damage than over-oiling.

Since this is oil cooled only should I think about a turbo timer? or external oil cooler/oil temp gauge?
Not unless you literally turn off of a highway and into your driveway, or you're prone to ripping on it just before parking somewhere. All you need is about 1-2 minutes of zero-boost, low-rpm driving to cool the cartridge down after a hard pull or two. Most of this is achievable while driving through a neighborhood until you reach your driveway.

Hi Justin,
I want to install a downward looking compressor housing on my EVO 3 turbo. According to a quick research, Subaru STI used a MHI 16G with the housing I want. I could not find any reputable vendor that sells it but I found this on Ebay

evo 3 compressor housing | eBay

My question is: Do you know where I can buy a genuine MHI 16G downward looking compressor housing ? and if not do you know if the one on the link is a good replacement to an MHI housing.
I am aware that I will have to fabricate a set up for the waste-gate actuator and I don't mind doing that.
Thanks for this great thread.
I'm pretty sure the Subaru turbos in question were all standard or "small" 16G's from the factory....meaning if you were able to score one of the covers or complete turbos, it will most likely require machining to fit an Evo III 16G compressor.

The eBay vendors have simply skipped that step and just cast a housing that mimics the factory housing yet is already cut for an Evo III 16G compressor. I'd trust one of the eBay covers if you're not having luck elsewhere.
 
Got one for ya Justin. I've got a PTE6076RLS turbo here. BB CHRA. Called up PTE and asked what size fitting is needed for this oil inlet. They told me a 1/4 NPT. I ordered up the PTE/Garrett Journal bearing oil feed line from ExtremePSI and it doesn't fit. The fitting is a hair too small. What's the next size up from 1/4NPT that might fit? Also...I'm feeding this turbo from the head on a balance-shaft deleted motor. What size restrictor do I use if any? Is the smaller hole within the inlet a restrictor itself? Right now, I just need to know what size fitting works in the inlet of this CHRA.

Also, under the 6076RLS inscription, is:

PTB
400-6077

Is that another model number or something?

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Those inlets are supposed to be 1/4" tube, the same as the inlet of a T25 which came stock on a 2G. The fitting is intended to seal on the flare at the bottom of the inlet, not tapered threads like NPT fittings.

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You need to rig up something to test the pressure between the filter housing and the turbo; add restriction as needed to keep oil pressure in the region of 65-70psi peak. Don't over-restrict as it may cause more damage than over-oiling.


Not unless you literally turn off of a highway and into your driveway, or you're prone to ripping on it just before parking somewhere. All you need is about 1-2 minutes of zero-boost, low-rpm driving to cool the cartridge down after a hard pull or two. Most of this is achievable while driving through a neighborhood until you reach your driveway.


I'm pretty sure the Subaru turbos in question were all standard or "small" 16G's from the factory....meaning if you were able to score one of the covers or complete turbos, it will most likely require machining to fit an Evo III 16G compressor.

The eBay vendors have simply skipped that step and just cast a housing that mimics the factory housing yet is already cut for an Evo III 16G compressor. I'd trust one of the eBay covers if you're not having luck elsewhere.

Thanks Justin. Since I could not resist the ETS intercooler kit deal that was offered to the DSM community, I will keep my EVO III turbo as is. I will just work around clearing the AC fan or just removing it and put a slim fan.
 
Those inlets are supposed to be 1/4" tube, the same as the inlet of a T25 which came stock on a 2G. The fitting is intended to seal on the flare at the bottom of the inlet, not tapered threads like NPT fittings.

The problem is, the threads don't catch at ALL on anything! The fitting just spins and spins and spins. So......what do I use?
 
Which fitting, the 1/4" tube fitting doesn't catch anything? Then it's possible someone stripped it out I suppose....you may need to drill and tap the flange on the top of the turbo for a T3-style oil inlet flange.

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Then you have to be using the wrong fitting. Make sure it's a 1/4" tube fitting, which would have a 7/16" x 20 thread, I believe.

You, sir, are correct. I just got off the phone with PTE again. Apparently, the first guy gave me bad info (imagine that). The oil feed fitting is a 7/16" bpt inverted flare. $23 for that adapter/fitting! Now....do I need a restrictor somewhere if I'm feeding this BB chra from the head (shortblock has NO balance shafts)?
 
I cant upload tge photo from my phone its pissing me off. It keeps saying a security issue not connected
Strange. Yeah I'd pretty much need to see pics to be able to determine if it's worthy of DSM use.

Apparently, the first guy gave me bad info (imagine that).
Surprisingly, I find that a lot within that company. LOL
The oil feed fitting is a 7/16" bpt inverted flare. $23 for that adapter/fitting! Now....do I need a restrictor somewhere if I'm feeding this BB chra from the head (shortblock has NO balance shafts)?
If it were a Garrett, I'd say yes- you'd want a .035" restrictor in there...but I honestly have no idea what PTE's own-design ball bearing cartridges require for oil, and apparently they don't know either. I've heard some guys say they were told to feed them unrestricted from the filter housing, which is 100% wrong.

Best thing I can tell you is proceed from the head, no restrictor- if it smokes, add a .035" restrictor and you should be fine. :thumb:
 
Looks like a T28. If that's the case you'd be in good shape if you can come up with a turbine housing to fit it- or just have a 2G T25 turbine housing machined to fit this turbo's turbine wheel, so you'd end up with a downfiring T28; roughly the same potential as a Small 16G, awesome for a daily driver.
 
Doesn't matter what the physical size of the compressor cover is, the wheel specs are what matters...and I'll bet my next paycheck if you measure the compressor specs you'll come up with 46.5mm / 60mm, making this a T28.
 
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