Frankenstein Garrett/Mitsub turbo?

[guitaraholic]

I've been looking to replace the slightly chipped compressor housing on my GT2860RS. Right now, I see a few options

- 60mm compressor
-----pros: Cheapest, Only need balancing, fast spool, decent performance
-----cons: Same as current setup, extra work for no gain


- 71mm compressor
-----pros: 380hp potential, available in billet
-----cons: Requires new housing, mismatched to turbine, laggy(ish)

- 68mm (Force Performance)
-----pros: Fast spool (Comparable to Disco), 400hp
-----$$$$$$$$$ It's $700 for the compressor wheel alone I believe

Or, I was thinking, could you use a 16G compressor wheel on a GT28 turbo? I know for a fact that the DSMers use Frankenstein turbos. This involves putting mixing a Garrett Compressor and CHRA with a Mitsubishi turbine and housings. I am not sure what is done to get the turbine shaft/wheel to work with the Garrett Ball Bearing system, but they have obviously got it to work.

I was thinking of using a Big16G or maybe 18G compressor, and having the housing machined to work. It's 68mm, so it is in between the 60mm and 71mm of Garretts offerings.


True, if Garrett offered a wheel only option of the 67mm GTX it would be a no brainer, but seeing how they want you to buy a whole CHRA, I don't see that as very reasonable.

[ILoveJDM]

seems like a lot of work and a waste of time for only a t28..you're trying to squeeze out the most out of it and i'm willing to bet the rest of your setup isn't so precise?

just go with the 60mm if its the cheapest.. its not "extra work" if you are going to be taking everything apart anyways.

[guitaraholic]

seems like a lot of work and a waste of time for only a t28..you're trying to squeeze out the most out of it and i'm willing to bet the rest of your setup isn't so precise?

just go with the 60mm if its the cheapest.. its not "extra work" if you are going to be taking everything apart anyways.


It's not about trying to "squeeze" out every ounce of HP. If that were the case, I would take an entirely different approach. I would probably go with my original idea of ditching the SR in favor of a VQ and twins, and besides, I have a completely different (and a lot more Expensive), project for something that is going to be faster and better handling than about 99.9% of what's out there on the road,, but that's a different story.

I'm looking at a happy medium that Garrett neglected to address until now (with the GTX28 series). If Garrett would sell the GTX Compressor wheels by themself, this would not even be under consideration. The 60mm isn't bad, but would like a little more headroom, and the 71 is too big. I just can't justify spending $700 on a compressor wheel for the FP68HTA.

[HPKMotorsports3]

Why not just buy a used(good/great condition) turbo? Cost effective and less work.

[guitaraholic]

The turbo I have is in pretty good shape. No shaft play, and turbine blades look excellent. I bought it for $350 shipped. I'm just looking at replacing the compressor wheel. Worst case is go with either a replacement 60mm or maybe a billet 71mm (being that it has longer blades and less mass on the outside radial, it should flow a little better, and have a little bit better spool).

I've already been running the turbo on the car, it's pretty quick as it is, and builds up boost relatively fast, I haven't been pushing it hard right now (just 12psi).

I don't want to buy another turbo, esp if I want to stay ball bearing. Eventually if Borg Warner ever get's there EFR series in full swing, I'll get either the 7064 or 7163 in twin scroll (already have the TS manifold w/ T4 flange)

[ILoveJDM]

It's not about trying to "squeeze" out every ounce of HP. If that were the case, I would take an entirely different approach. I would probably go with my original idea of ditching the SR in favor of a VQ and twins, and besides, I have a completely different (and a lot more Expensive), project for something that is going to be faster and better handling than about 99.9% of what's out there on the road,, but that's a different story.

I'm looking at a happy medium that Garrett neglected to address until now (with the GTX28 series). If Garrett would sell the GTX Compressor wheels by themself, this would not even be under consideration. The 60mm isn't bad, but would like a little more headroom, and the 71 is too big. I just can't justify spending $700 on a compressor wheel for the FP68HTA.

i didnt say squeeze HP. What i was getting at is what is the point if the rest of your setup probably isnt up to par with being so anal about some compressor size. it isnt going to matter in the end, barely improved spool time for what. just buy something common and cheap, if youre not competing professionally what is the point.

[PoorMans180SX]

Rather than try to hybrid and bore out compressor wheels and such, You can just stick a Big 16G or 18G in a SR housing and bolt it on.

Turbine Housing Trusts T518Z TD05H 18g SR20DET 8cm | eBay (http://www.ebay.com/itm/Turbine-Housing-TRUSTs-T518Z-TD05H-18G-SR20DET-8cm-/150971136861?pt=Motors_Car_Truck_Parts_Accessories&hash=item232694bb5d&vxp=mtr)

There you go. They make one for a TD06 turbine wheel too if you're looking to upgrade your turbo size. And 16, 18, and 20G wheels have the same exducer so you just need a different compressor housing to upgrade compressor wheels.

They also make a T25 external gate housing.

You can probably sell that turbo for more than the whole 16G setup costs...