Using a GT turbine housing on a T28, possible? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

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.

05-30-2008, 09:47 PM	#1
Omarius Maximus Zilvia Junkie Join Date: May 2005 Location: San Diego Posts: 564 Trader Rating: (0) Feedback Score: 0 reviews	Using a GT turbine housing on a T28, possible? 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?

05-30-2008, 11:23 PM	#2
McRussellPants Nissanaholic! Join Date: Oct 2005 Location: Austin, Tx Posts: 2,168 Trader Rating: (0) Feedback Score: 0 reviews	wheel sizes are different. no. why.

05-31-2008, 09:42 AM	#3
Omarius Maximus Zilvia Junkie Join Date: May 2005 Location: San Diego Posts: 564 Trader Rating: (0) Feedback Score: 0 reviews	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.

05-31-2008, 10:58 AM	#4
McRussellPants Nissanaholic! Join Date: Oct 2005 Location: Austin, Tx Posts: 2,168 Trader Rating: (0) Feedback Score: 0 reviews	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.

05-31-2008, 11:12 AM	#5
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	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.