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Questions for Justin...

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bwhite, like myself is running an HX52. So you cannot compare that to your little HX35.

He use to run an HX35 and held the record for it for quite a while. The numbers I posted above were from his HX35 with an open manifold on the stock housing.
 
Twin-scroll tech allows you to use a larger a/r housing (for flow) but spool the same or quicker as a smaller a/r housing. That in mind, if you use a larger a/r twin-scroll housing paired to a single-scroll manifold, you're getting all of the flow that the larger housing can give you but it's also going to be just as laggy as if you were using a single-scroll large a/r housing.


There is also a .70AR housing available but finding information on it is proving difficult after searches. If this housing(when mated to a proper t3 manifold) can produce full spool by 3500-4k rpm and not fall on its face up top it may be an option. Seeing as it is quite larger I am afraid that it may not spool until 5K+ RPM....which is a nono.
Dave ran this housing with a 7-blade HX35 identical to yours on a whooped-up stock 6-bolt a few seasons ago and went 11.60 @ 121 with boost in the mid-20's. Full boost was around 4500, so it was probably as laggy as a HX40 in a bolt-on housing. Keep in mind the engine was very, very tired.


-So how hard is the bolt on .55AR BEP housing going to fall on its face later in the rpm's?
Not really sure- I've never had personal experience with this setup.
-- will I only see ~55lb/min flow or drastically lower?
Probably 55 lb/min at the very best...although this housing and turbo combo has trapped 130mph.
-If I do use the non-divided manifold on the divided twin scroll housing, will the power come closer to 5K rpm gradually, or lag up until then and hit like a drop kick in the back?
Again, no personal experience....but with oversized a/r housings the boost generally comes on very slow.
 
Since my turbo had thrust play, shouldnt my thrust plate/collar be in pretty bad shape? What else could cause the play? During disassemble process i kept pulling the shaft in and out to see if i could locate the culprit and noticed the collar in the oil shield to be moving in and out as i did this. I dont know if this would be normal or could this be the cause?
 
Since my turbo had thrust play, shouldnt my thrust plate/collar be in pretty bad shape? What else could cause the play? During disassemble process i kept pulling the shaft in and out to see if i could locate the culprit and noticed the collar in the oil shield to be moving in and out as i did this. I dont know if this would be normal or could this be the cause?

Thrust collar is likely junk, yes. The thrust collar will wear into the thrust plate, wearing / destroying both parts.
 
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Justin, do you think there's a turbo that will bolt up to the fp mani and out perform the small 16g at 20-22 psi for a street/dd car? I'm thinking power wise yes, but what about spool?
 
I'm afraid I would have to concur with Justin on that one.

I went back idk how many pages.I could not find pics of MHI 20g's that I could click and make larger.Do you have any on hand.

I'm gonna redo my search.But my computer is being slow today.:(

This is the turbo I'm looking at picking up for shits ang giggles.The compressor wheel does look a tad wheathered, but would be fine.If not, I think I may just happen to know a guy that can just rebuild it.ROFL

http://s1130.photobucket.com/albums/m539/dsmsource/20g turbo/
 
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Did you ever figure out what turbo I posted up was?
 
Some monster Garrett that originally began life on a 12+ liter Detroit Diesel. That's what the

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on the cover means. Without wheel specs I have no idea- I'm not that good with turbos that are too large for use on sport compact applications.
 
Did you ever figure out what turbo I posted up was?

It looks like a GT4294.Journal bearing.


Turbo Compressor Turbine
Turbo PN CHRA PN Ind Whl Dia(mm) Exd Whl Dia(mm) Trim A/R
731376-1 712402-7 70.30 94.00 56 0.60 WhlDia(mm) Trim A/R
82.00 84 1.15

Don't quote me on that.But this is why Garrett has a website.Products | Turbochargers




Justin 20g question fixed with the link to photobucket.
 
I was contacted by the guy with the 20g today.It's a mits compressor housing, with a Garrett BB center section.

Not sure if there a mits turbine and compresser wheel.

But I was very shocked to find out it's a BB hybrid mits 20g.So you get 20g flow and the spool of a smaller turbo, being it's BB.

Being BB, I backed out of getting it.Although it sounded very interesting.

Ohh the top of post 989, was giving Leon what garrett listed as the gt4294, and a link to the gt4294 page.

That's not the specs on the 20g.
 
BB doesn't mean faster spool. It typically has faster transient response but not necessarily faster spool.
 
I was contacted by the guy with the 20g today.It's a mits compressor housing, with a Garrett BB center section.

Not sure if there a mits turbine and compresser wheel.

But I was very shocked to find out it's a BB hybrid mits 20g.So you get 20g flow and the spool of a smaller turbo, being it's BB.

Being BB, I backed out of getting it.Although it sounded very interesting.
It's a ball bearing 30R Garrett, not a 20G. Don't let the compressor cover fool you.

If you take a hamburger and stuff it into a hot dog bun, then take a photo of it....what will you be eating shortly after the photo is taken- a hot dog or a hamburger?
 
Ohh so it's a trickster like a 20g inside a 14b cover.Well that's not as interesting as I thought.Pretty glad I turned this down once I found out it was bb.

Mmm hamburger.
 
Hi Justin.
I have bought two 16G, both come here next week so i dont have compressor wheel diameter for confirmation today.

Vendor
$40 - 16g Core (need rebuilt) - http://i.imgur.com/D7ouc.jpg
$60 - Big 16g Core - http://i.imgur.com/A57kH.jpg

The first look a big 16G "42"
The second look a small 16G ( small compressor wheel )

More pictures:

Gallery 1

Gallery 2

Let me know what you think about the shaved second compressor housing and wheels difference.
I have already a 14B donor for a nice turbine axle/wheel (cracked CHRA).
Another good 14B come here this month.
A brand new complet OEM 14B CHRA
And two rebuild kit from tradergreg

If you can confirm me the compressor wheels needed for the two 16G rebuild, i can bought it and save shipping for the next BigBox comming here in France this month...

Thanks for your time again :thumb:
Remy
 
That Small 16G needs a compressor wheel and turbine, the Big 16G may be able to be saved but it's not in the best of shape either (shows damage from excessive in/out play). To fix them both properly, you'd need new rotating assemblies for both.

Honestly unless they were super-cheap, I'd pass on this deal altogether and find something with no wheel damage.
 
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