fox4 said:

The very tip/top diameter of the inducer: 1.9 inches/48.45 mm
The bottom diameter of the inducer (where top of the smaller inducer blades start): 1.99 inches/50.66 mm
Exducer diameter (or diameter of the entire wheel itself): 2.75 inches/69.92 mm
Exducer height at edge of wheel: .235 inches/5.99 mm
Wheel height: ~1.021 inches/25.95 mm

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An Evo III compressor is 1.90" / 2.68", so your inducer is the same as an Evo III with a slightly larger exducer. This would still prove to be more efficient at lower boost levels than a Big 16G or Evo III compressor, even without the additional fin.

Sounds a little like the Frank 1 20G....who would want a turbo with a smaller inducer than an actual 20G compressor? Someone that wants better performance at lower boost levels. The 46-trim Garrett compressor used in the Frank 1 and Frank 2 has a much larger exducer than a 20G.

jusmx141 said:

An Evo III compressor is 1.90" / 2.68", so your inducer is the same as an Evo III with a slightly larger exducer. This would still prove to be more efficient at lower boost levels than a Big 16G or Evo III compressor, even without the additional fin.

Sounds a little like the Frank 1 20G....who would want a turbo with a smaller inducer than an actual 20G compressor? Someone that wants better performance at lower boost levels. The 46-trim Garrett compressor used in the Frank 1 and Frank 2 has a much larger exducer than a 20G.

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Since this thing would be more efficient at lower boost, does it mean that it will be less efficient at higher boost than the EvoIII and Big 16g? Or will it be more efficient at lower boost and then pretty much the same as a 16g at higher boost?

I would say the same or less than an Evo III at high boost. It's tough to beat the Evo III's 40 lb/min+.

Since the compressor has yet to be identified, the only way you would know is to bolt it on and log peak airflow.

To4B S trim wheel has the same dimensions. I have no idea how many fins it had. It was less efficient than the EVO3 16G at any boost level.

^ ^ Excellent info. I had previously never heard of an S-Trim compressor; just the V-Trim (which I know wasn't very efficient but was often paired to the giant P-Trim turbine for some reason).

Similar to a big 16g compressor flow, with not much more efficiency through the range of flow common to a 16g setup also. There appears to be no point in the upgrade. The small 16g is more efficient after 25lb/min. the evo3 16g flows more. The big 16g works jsut as well through 38lb/min and chokes a little higher. . . All assuming I have the right map. Considering the big 16g has about the same inducer size, I think I do; since total flow is predominantly determined by the inducer diameter.

The Frank turbos were developed because small 16gs used to be hard to find back then and Evo III turbos were not for sale in the states. It is easy to forget that a 16g talon was a beast of a car 10 years ago. Back then Frank turbos and Mutt turbos were the high end setups for race cars.

TurboAnything said:

It is easy to forget that a 16g talon was a beast of a car 10 years ago.

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Some still are.

Finally tracked one of these beasts down for myself; the compressor appears to be a baby 60-1. The blade count is the same, the blade shape is the same, and even the "straight" angle of the exducer tips are the same between the S-trim and 60-1 (S-trim on the left):

now that youve taken all those pictures for us, all you have to do it send it to me, thanks~

So how good of a turbo is that? Better than a bastard 20g I would assume.

habitatguy187 said:

So how good of a turbo is that? Better than a bastard 20g I would assume.

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That's doubtful. The 20G inducer is 2.07/ 52.5mm diameter, which gives it theoretical advantage in max flow capability over this turbo. Although I think both would benefit from a larger compressor housing like a TDO6 housing.

habitatguy187 said:

So how good of a turbo is that? Better than a bastard 20g I would assume.

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Hard to say; the inducer is smaller than the 20G by a little while the exducer is slightly larger.

When you consider that a 60-1 compressor will outflow a standard Garrett 60-trim compressor by 5+lb/min even though the inducer and exducer measurements are nearly identical between the two, it's possible this compressor could outflow a MHI wheel with nearly identical specs.

However, we must also consider that if this were truly an amazing compressor that we would see more of these hybrids than the occasional one every now and again. This is hybrid tech from the late '90s / early 2000's at work.