Turbo identification conformation and use information

[Secret squirrel]

ok, this guy on a local board is selling what he says is a s14 T28 turbo

but, it looks like a T3 with a t25 flange. just want to see what u guys think.

so my question is...what is it.



thanks alot

[r34 gtr]

got the right exhaust outlet flange, thats for sure. the AR on that compressor looks a little small though.

[50-50]

rb26 twin T28s use the same compressor A/R tho. Looks like a T28 to me. Not sure if it's from a S14. A side view would help.

[mbmbmb23]

This is what your compressor housing is from:

http://cheapturbo.stores.yahoo.net/gat3su.html.42 A/R on a T3 isnt the same as if it were a T2. I'd say the end result would be similar to an S14 T28, maybe slightly less since the S14 turbo has a T04b compressor and not a T3.

-m

[float_6969]

That is NOT an S14 SR T28. It might flow close to the same amount, but probably not quite as much.

[Secret squirrel]

thanks for the input guys...so heres another pic.



now if it is a T3 super 60 housing, how will it flow and is it a good quick spool for the ca? My ca is goin to be 90% drift driven so quick spool is important.

SS

[NUT-CSE]

That isnt a S14 T28, the S14 T28 has a AR .60 compressor housing and AR .64 turbine housing.

Its not a GTR turbo either.

Seems to be a T3 of some kind.

[mbmbmb23]

I believe the compressor side is equivalent to the GTIR compressor which is a T3 compressor. I think the turbo would do fine, I would run it with stage 3 mods.

-m

[Secret squirrel]

yea i bought it. the owner claims its a t3 housing with a t28 wheel and exhuast housing...im goin to pick it up later this week. When i get it ill take more detailed pictures. he is giving me a money back option. So if it turns out to be teh ghey, no worries.

and by stage 3 mods...what do u mean.

i will be running these mods:

Blitz FMICWalboro pumpsard fpr550cc injectorsfull turbo back exhuastHKS wastegate (if it mounts up)Megasquirt IIport and polish3 angle valve jobSSauto **** manifoldstock HG with ARP studs

will it be a goood match?

thanks all

SS

[The_Chosen_One]

I believe the compressor side is equivalent to the GTIR compressor which is a T3 compressor. I think the turbo would do fine, I would run it with stage 3 mods.

-m

The GTi-R turbo uses a T04B compressor housing just like the S14-5 GT28R.

[Woods Crasher]

but, it looks like a T3 with a t25 flange. just want to see what u guys think.

Correct me if I'm wrong, but isn't a T3 compressor with a T25 turbine what makes a T28 a T28?

[mbmbmb23]

The GTi-R turbo uses a T04B compressor housing just like the S14-5 GT28R.

Nope, the GTI-R turbo's compressor is a T3 super 60. Theres a thread on one of the forums where they put the S14 compressor housing and wheel on a GTIR turbo and it was good for 315-320hp (on an SR) vs around 300hp they were seeing with the OEM GTI-R unit.

http://importnut.net/turbosizing.htm

[CadetLD]

Not trying to destract the thread but thgat does A/R mean?

[NUT-CSE]

The larger the a/r, the longer the turbo will lag, but the more potential it has for top end power.

Abit more technical

A/R ratios are ways of further sub-classifying compressors as well as turbine housings by offering differing flow characteristics within equally sized housings. The A/R is calculated by dividing the inlet (compressor) or discharge (turbine) diameter’s cross-sectional area by the distance between the center of the wheel’s shaft and the center of the measured inlet or discharge area. When calculated correctly, the A/R ratio will remain constant throughout the housing. Varying the A/R affects compressor performance little but the same cannot be said of turbine housings.

[Masterdebater]

i have a s14 t28 turbo...that is most definately not an s14 t28...i have no idea what that is...

[CadetLD]

thanks for the clarification nut-cse but what does the A and the R mean?

[NUT-CSE]

A/R (Area/Radius)

[c-rad]

thanks for the clarification nut-cse but what does the A and the R mean?

http://www.turbobygarrett.com/....html

[Secret squirrel]

picked up the turbo tonight...here are more detailed pictures.

Stock CA turbo on the left

[Secret squirrel]

says .64 on the turbine side.

so .42 compressor and .64 exhuast...

SS

[NUT-CSE]

Does it have a serial number on it??

Its a turbo of a GTR but there are 11 variants of this turbo.....

[Secret squirrel]

The identification plackard on the center section is missing. WHere else could i find the serial number?

SS

[NUT-CSE]

I wouldnt kno? Once its gone, its gone forever.

You could measure the compressor and exhaust wheels and you could match them to one on the list.

To me it looks like it would be the R33 N1 turbo, maybe the Nismo 260RS or Nismo R1 but its anyones guess.

http://homepage.ntlworld.com/tbroom/Turbos.htm
Modified by NUT-CSE at 7:54 AM 3/30/2007