Questions for Justin...

[xxNocturnalxx]

Then one's not a 20G, it's a Hahn Super 16G....unless someone machined the smaller cover for a 20G wheel.

So I took both comp covers off of the turbos and compared the wheels, they are exactly the same dimensions. So it seems Hanh may have used 2 different types of covers, the smaller looking cover is much deeper but smaller in diameter, the bigger looking one is a large diameter but smaller width/depth. It seems to me Hanh did this for fitment issues so we don't have to do things such as dent the water pipe for comp housing. The smaller deeper housing is ideal for fitment and seems to support the same air volume for no loss in efficiency.

Super 16gs can have these different combos as well, it seems to be 3 total. J pipe bolt on and the 2 I just mentioned.

Of course the covers are not interchangeable but can make it confusing when trying to figure out what you have based off a quick glance.

 

[WFO-TSi]

Any ideas on upgrade (or downgrade) to make that kind of power with a better spool? I'm around 400 and hes at 390. but i hit full boost at 3800 and hes seeing boost as little as 2300 rpm and then full boost at 3400.

Increase the displacement of the motor.

 

[JusMX141]

So I took both comp covers off of the turbos and compared the wheels, they are exactly the same dimensions. So it seems Hanh may have used 2 different types of covers, the smaller looking cover is much deeper but smaller in diameter, the bigger looking one is a large diameter but smaller width/depth.

Interesting- I've never seen more than one cover used on the Hahn 20G's I've serviced over the years. You may want to post some pics for reference.

 

[casperfast]

easy one for you. have you ever seen this run with success on an hx35 build and holset hot side? looks poor quality to me but i didnt see another solution the the downpipe to outlet.

 

[xxNocturnalxx]

Interesting- I've never seen more than one cover used on the Hahn 20G's I've serviced over the years. You may want to post some pics for reference.

<img src="http://www.dsmtuners.com/gallery/files/1/3/3/0/3/6/photo_4_218714.jpg" alt="Hanh 20g" />

<img src="http://www.dsmtuners.com/gallery/files/1/3/3/0/3/6/photo_3_466451.jpg" alt="Hanh 20g" />

<img src="http://www.dsmtuners.com/gallery/files/1/3/3/0/3/6/photo_2_907455.jpg" alt="Hanh 20g" />

I didn't feel like pulling the covers again, just trust me the wheels are exactly same, measured with a digital caliper.

 

[99gst_racer]

The smaller cover is the cover Hahn used on their s16g. Just machined for the larger wheel. I used to have one of those 16g's years ago.

(Hahn s16g, MHI 20g w/ 17c cover, Garrett 40r)

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[JusMX141]

easy one for you. have you ever seen this run with success on an hx35 build and holset hot side? looks poor quality to me but i didnt see another solution the the downpipe to outlet.

That's for a Garrett 5-bolt outlet...has no promise of ever fitting a Holset.

I didn't feel like pulling the covers again, just trust me the wheels are exactly same, measured with a digital caliper.

Definitely a Super 16G cover on the smaller one, and it's definitely been machined as it's missing the "step" on the inlet.

Same cover on a 16G:

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[xxNocturnalxx]

I see, any reason why you think someone would do that? Any change in performance? Would a cover like this be an ideal direct replacement? Turbo Compressor Housing 3" Trusts TD06 TD06SL2 TD06H 20g | eBay

 

[Slo2gen]

What exhaust housing is this.... Its a BW S366 but does not take the 3" vband or Marmon flange specific for the BWS200/300 turbo's. My only guess is a 3.5" vband outlet...

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The D BEP H is the only marking on the turbine housing and its a T3 inlet.

 

[JusMX141]

I see, any reason why you think someone would do that?

All they had, maybe? Perhaps their intercooler piping was already set up for the existing cover and they didn't want to change.

Any change in performance?

Not likely anything that would be noticed by the butt dyno.

Would a cover like this be an ideal direct replacement? Turbo Compressor Housing 3" Trusts TD06 TD06SL2 TD06H 20g | eBay

Should be, as long as your wheel is indeed a 20G (52.5mm / 68mm).

What exhaust housing is this.... Its a BW S366 but does not take the 3" vband or Marmon flange specific for the BWS200/300 turbo's. My only guess is a 3.5" vband outlet...The D BEP H is the only marking on the turbine housing and its a T3 inlet.

Bullseye Power .70 a/r. The v-band is odd, somewhere around 3-1/4".

 

[casperfast]

ok, i see the difference. so i need one like this. any chance there is an o2 housing that is vband top to this and dsm downpipe flange on the bottom?

 

[JusMX141]

Not really as most DSM o2 housings I've seen are 2.5" I.D. at the flange. You'd be better to have something custom-fabbed that's 3" the entire way through.

 

[AllanL]

Hey Justin,

Got this from a friend who has been keeping it for the longest time.

He says it a Buschur 20G. But the compressor wheel is not the 'usual' 20g.

This wheel measures 51/78mm. [ind/exd].

The turbine has been clipped, which leads me to beleive that it is a BR20G.

But the comp wheel is the clincher.

What comp wheel is this?

I know this ass'y will need a rebuild and replacement of parts...just need a starting point.

By the way, the comp housing has been machined to accept this wheel...well, obviously...

Thanks for any input/insight...

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[JusMX141]

Frank Level 1 20G, once built and distributed by Texas Rebuild (Turbochargers.com).

I see some turbine inducer damage as well.....unfortunately you're kinda screwed. That compressor wheel is a T04E46 Garrett which requires a LOAD of machine work to fit this turbo. Last time I rebuilt one of these with compressor damage for a customer was about 5 years ago and the cost of the new compressor and the machine work alone cost me a shade over $200. With the compressor wheel, machining, new turbine, clipping, rebalance, and internals you're at $450-$500 in parts alone into a turbo that will struggle to outperform a MHI 20G. In fact, you can't even use a 20G cover on this turbo because, as you stated, the inducer is 51mm where at 20G inducer is 52.5...so the inducer is actually smaller than a 20G; about the size of an 18G in reality. The exducer is 10mm larger, however.


Also- just because a turbine is clipped doesn't automatically mean it's a Buschur 20G. I've seen Small 16G's with clipped turbines before.

 

[AllanL]

Thanks Justin...

One more thing, the CHRA is machined to fit the T04E46 exducer diameter...would it be possible to use the same housing as a rebuild base using a 20G compressor wheel, knowing the 20G exd dia is smaller?

Of course, this is all assuming that the housing innards do not have any wear yet.

 

[JusMX141]

You shouldn't...there will be a 10mm gap around the entire circumference of the 20G wheel if you try.

 

[AllanL]

You shouldn't...there will be a 10mm gap around the entire circumference of the 20G wheel if you try.

is this bad?

 

[JusMX141]

The idea of the compressor wheel fitting tightly into the backplate is to create a narrow "squish" zone between the cover and center housing to compress the air and force it outward. If the spec didn't need to be on-the-money, I'm sure Mitsubishi and other brands could just get away with using one center housing for all of their turbos.

In other words- a new center housing is under $100. Don't try it.

 

[AllanL]

The idea of the compressor wheel fitting tightly into the backplate is to create a narrow "squish" zone between the cover and center housing to compress the air and force it outward. If the spec didn't need to be on-the-money, I'm sure Mitsubishi and other brands could just get away with using one center housing for all of their turbos.

In other words- a new center housing is under $100. Don't try it.

got it!
thanks!


since i have to get another comp cover...

will this housing below,

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clear the water pipe, or be dimensionally the same as this housing below, which is like what I have...

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of course the inlets' diameters are different and i plan to run an external wastegate ...



*thanks to the sources of these pics

 

[JusMX141]

Being a Frank L1 20G, your cover should actually be a TD06 17C cover being that the 20G cover would already be too large to work with the T04E46 wheel:

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...but to answer your question, all of the cover(s) shown are nearly identical in spec and would have the same water pipe clearance. Plan on denting a little if you're using a stock exhaust manifold.

 

[DSM Chase]

Not sure what happened to My hx35...
Threw it on got about 500 miles out of it now I have up and down shaft play, oil smoke at idle, and the compressor wheel has hit the housing, is the wheel now trash?


How much for a rebuild?

Thanks

 

[JusMX141]

1) I can't possibly predict what happened to your turbo over the internet.

2) This isn't the place to discuss personal business...hence the reason we conveniently have a Private Message feature.

 

[DSM Chase]

Sorry picture didn't upload, pm coming soon!

 

[Kapok6]

My turn my turn.

Jus, how fkd is this e3 16G? Has some in and out. Per feeler gauge, .017"/.42mm. Seems to have contacted the compressor housing on one half. The other side doesn't look like anything touched it. From what I can see, turbine side looks fine. Thoughts?

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[Seamus]

Hey. Guy with the frank1. I think you are missing everything justinmx is telling u. Your bearing housing can't be reused either with a 20g wheel. The housing is cut for the larger exuder of the Garett wheel.