garrett turbo is it a t25 or a t28 ??

[zeekster777]

how can i tell, i just picked up a turbo, the man said it was a t28, but my friend said its a t25, its a strait bolt on 4 my gsx. i looked at pics and it looks just like a big t28 can any one help??

 

[proteusx301]

I think the only difference between the T25 and T28 is the diameter of the compressor inducers and exducers. Try measuring the inlet size to the turbo. A T28 is nothing more than a larger compressor wheel crammed into a bored out T25 compressor housing. On the outside they are indistinguishable at a quick inspection. I think I remember seeing a ID tag on my CHRA that says Garret T25, but don't quote me on that.

 

[zeekster777]

what specs am i looking 4 i have it opend up

 

[proteusx301]

Are there any markings on the CHRA? Look around on the forums and try to find specs on the T25 wheel measurements.

This is what a T25 looks like. I'm not sure if a T28 looks any different on the compressor wheel.

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Second link is to Forced Performance's website for T28 turbos. You can see a difference in thickness of the suction port where its been bored out for the larger wheel.

Forced Performance Turbochargers: DSM FP Big 28 Turbo

 

[ChillinGST]

Easy answer... Count the blades on the hot side. 11 blades = T25, 10 = T28 and 9 = Big28.

 

[zeekster777]

thanks 4 the help i let you know what it is when i get home

ok so its a t25 any one want it make a offer it is in good shape very good

 

[BALISTIK_ONE]

I know I know this is old BUT...
I just bought a "t28" off a local dsmer but after reading this I checked it out and my hot side has 12 blades. Anyone have any input?? Really going to be upset if it isn't.

Oh yea I been reading this forum for what seems like forever now but just signed up. K sorry for posting on a old thread.

 

[CrackedDSM]

What's the compressor look like? I have a T28 right now I can take pictures of and post here to help.

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This is an FP BigT28 that uses a different turbine wheel. Other T28s I've read have 10-blade turbine wheels. Also notice how thin the wall is on the compressor cover compared to the picture of the T25 a few posts above.

 

[BALISTIK_ONE]

Thanks for the reply. So it looks like it on the turbo side but ny hot side has 12 blades. Kind of weird to me...thanks for the pics

 

[Dsmkauai]

No it's not weird! Only the fp bigt28 has a upgraded turbine wheel. The normal t28 still uses the t25 tubrine wheel, its just the compressor wheel and machining to the housing and cover that is different!

 

[BALISTIK_ONE]

No it's not weird! Only the fp bigt28 has a upgraded turbine wheel. The normal t28 still uses the t25 tubrine wheel, its just the compressor wheel and machining to the housing and cover that is different!

Ok then...noted