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View Full Version : Using a GT turbine housing on a T28, possible?

Omarius Maximus
05-30-2008, 09:47 PM
I'm basically building a frankenstein turbo, and I have a T28 center section. I have a GT28R turbine housing coming in the mail for me, and was wondering if they would "fit"?

I understand that the T25/T28 turbine housings are attached via 4 bolts, and the gt turbine housings use 6. I was thinking about machining custom plates, to combine the two.

The only thing I need to know is if the openings are the same?
McRussellPants
05-30-2008, 11:23 PM
wheel sizes are different.

no.

why.
Omarius Maximus
05-31-2008, 09:42 AM
The wheel diameter is the same, it's the "trim" that's different...

As to why...well...it's a long and stupid story not worth hearing.
McRussellPants
05-31-2008, 10:58 AM
trim is a function of wheel diamter.

it could work if the trim was smaller I geuss, but thats probably not the case, and having basically clipped T28 would be the worst turbo ever.
Def
05-31-2008, 11:12 AM
The GT housing with an NS111 turbine wheel will have a larger diameter than the 53mm wheel in a T28/GT2560R. It'll be like constantly having your wastegate cracked open a bit - i.e. it'd suck.