Inducer/Exducer Size. Flow #'s?

[SASHO91]

Would it be possible to determine the amount of flow a turbo can achieve just from the Inducer/Exducer measurements on both sides and the A/R?
I have not been able to find any information about the turbo I have anywhere. I'd like to know if this turbo is up to the task.

TIA.

EDIT: Seems that the Turbine has a trim of around 60. I say around as my measurements are not exact, but close. I haven't measured the compressor yet.. but from the looks of it, it's just a little smaller. The turbo's A/R is .5

EDIT2: Got the measurements off the compressor. Seems that this turbo is just slightly bigger than a Big 16g.
The 16g- Inducer-1.8'' / Exducer-2.6''
My Garrett-
Inducer-1.875''/ Exducer- 2.75''

As for the hot side,
Inducer-2.9''/ Exducer- 2.25''

From this info is it possible to get a general flow rating?

 

[Toolman]

Would it be possible to determine the amount of flow a turbo can achieve just from the Inducer/Exducer measurements on both sides and the A/R?

Yes, you can make a reasonable approximation.

Seems that the Turbine has a trim of around 60. I say around as my measurements are not exact, but close. I haven't measured the compressor yet.. but from the looks of it, it's just a little smaller. The turbo's A/R is .5

EDIT2: Got the measurements off the compressor. Seems that this turbo is just slightly bigger than a Big 16g.
The 16g- Inducer-1.8'' / Exducer-2.6''
My Garrett-
Inducer-1.875''/ Exducer- 2.75''

As for the hot side,
Inducer-2.9''/ Exducer- 2.25''

From this info is it possible to get a general flow rating?

I converted your measurements to metric and came up with:
Comp: Ind - 47.6mm Exd - 69.85mm - 46trim
Turb: Ind - 73.7mm Exd - 57.15mm - 60 trim

Comparing that to Garrett's spreadsheet, I could not find any turbocharger that matched both compressor and turbine measurements. Your turbine measurements do not seem to fit. You describe a large turbine (which would not be matched to a smallish compressor in most scenarios) but with a very small A/R. But, as far as compressors go, the GT28 seems to match well. A GT2871 has a 49.2mm inducer, a 71mm (as denoted by the nomenclature) exducer, which is a 48 trim. It is rated @ 250-400hp for 1.8-3.0L engines.

Also, the GT3267 (even a closer match to your measurements), with a 48.3mm inducer/67mm exducer, is rated for 200-400hp for 2.0-3.0L engines.

But again, these do not match up to your turbine measurements. The only turbo with a ~73mm turbine wheel is the GT37 (72.5 turbine wheel dia with a 1.12 A/R), which has a larger compressor section (2.1" I/3" E) than what you describe.

Hope this helps.

 

[SASHO91]

Thanks Tim.

No wonder I couldn't find anything on this thing... it's like it doesn't exsist!!! My measurements are not exact, but they are not that far off either. Im wondering if someone at some point in time swapped the cartridge.

I'm trying to think of a better way to ask this, but basically, how will this turbo react with the large turbine/small comp. ?

 

[Toolman]

Thanks Tim.

No wonder I couldn't find anything on this thing... it's like it doesn't exsist!!! My measurements are not exact, but they are not that far off either. Im wondering if someone at some point in time swapped the cartridge.

I'm trying to think of a better way to ask this, but basically, how will this turbo react with the large turbine/small comp. ?

Well, if you have some high quality calipers, I would recommend another measurement, just so we can get a better idea of what this is. As it stands, I just really do not think that turbine would exist. For the size of turbine you measured, I can never imagine it having such a small A/R. Where did you get it? Do you know what it has been on in the past? If the measurements are correct, then I fee like that turbine is going to choke off at high rpms, but it should spool quick and have great low end TQ.

The practice of using a smallish turbine with a larger compressor is popular (my first turbo SHO had this), as it can give you more HP than its smaller cousins, but still have great spool characteristics. But I can not see what benefit there would be in a larger turbine/smaller comp. Are you sure the .60 A/R was for the turbine and not the compressor?

 

[SASHO91]

AFAIK, it was a diesel turbo that was laying around the shop at school. My instructor said it only had about 500hrs on it, and that it was mine if I wanted it.

I don't have any calipers, but even still I think my measurements are very close.

Not following you on the .60A/R part. The turbo has a .50A/R, labeled on the compressor. Not unless that was a typo?

 

[Toolman]

AFAIK, it was a diesel turbo that was laying around the shop at school. My instructor said it only had about 500hrs on it, and that it was mine if I wanted it.

That explains it. A turbo designed for a 4000rpm vehicle is going to be a bit different than one for a 7000rpm vehicle.

I don't have any calipers, but even still I think my measurements are very close.

Not following you on the .60A/R part. The turbo has a .50A/R, labeled on the compressor. Not unless that was a typo?

I mistyped, I was think about the trim I guess. I was questioning the .5 A/R because that is very low for a hotside, most especially one with the size wheel you mentioned. But a .5 A/R for the compressor sounds about right.

While this turbo may not give you an ideal power curve as far as matching the natural curve of the SHO engine, it will certainly work to boost your power nicely, and since it was free, all is well!