Can we please list known measurements on various HT3B turbocharger models.

A friend of mine bough HT3B off the Ebay. Seems it's larger than we expected, and may not be suitable for doing twin turbo setup. I am under an impression that primary turbo compressor inducer ought to be at about 70mm's (or below) in tow twins.
Appears to me that his turbo is suitable for high rpm/high hp engine.

Specs of his turbo:

Compressor wheel inducer 77mm
Turbine wheel exducer 87mm
Turbine housing 26cm²

 

HT3B is for a 400+ hp 855ci engine not probably the best for what you want

 

Sounds about right to me for a primary in a twins setup.

 

They do look big when you start thinking about hanging them in that small hole under the top turbo. I think that's about the right one for the big turbo.

 

The compressor wheel sounds a little big, but it should work. The down side is it will just take a little longer to spool. On the up side it will move more air.

 

Am I right assuming that most of the HT3B's have smaller compressor wheels than the model my friend has?

 

IIRC most of them are in the 70-72mm area...but a 77mm should be a good one! What is he going to use as a secondary? HP goals?

Chris

 

The one I have has an inducer in the 75-76mm range. With a 22cm housing, should be interesting to see where it works best.

 

Let's raise the dead beast of a thread, just to remind you guys that not all HT3B's are the same size.

 

I thought they were only available in 26 or 32cm exhaust housings?

 

They also have 32cm housings as well which are ginormous! And 22cm and 23cm...

 

The inducer size alone doesn't tell you all that much about how much air it will move.... You can make a 75mm inducer flow more than a 78mm inducer...

JMO

 

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Crickey!!
I read from a turbocharging handbook that the main governing factor to a compressor air flow is the inducer diameter.

I have , however, noticed quite a large change in air flow volume (mass) when comparing Garrett turbocharger compressor maps against one another.
The (somewhat) same diameter inducers can flow surprisingly different numbers.
Go figure.

 

Well, it IS the main governing factor, and a larger inducer will flow more IF the design is the same (same number, angle pitch of blades, etc). A lot depends on the trim. A lower trim wheel will have a larger exducer for a given inducer size. This accelerates the air more against the housing because there is increased angular velocity. Hence, a lower trim wheel will "suck" harder on the inlet for a given inducer size. That means it will flow more- to a point. That point is a near-vacuum at the inducer. Once you hit this point, it doesn't matter how much harder you "suck" on the inducer, it won't flow more. So in a sense, it you just hit this saturation point a little earlier (in terms of shaft RPM) with the lower trim wheel (larger exducer).

JMO

 

ki have a 77mm with a 20cm turbine housing if that ads to the mix