t28 rebuild for rb20 DIY

[CEF11E]

I am rebuilding my series II t28 turbo of an rb25. and decided to mod it on a tight budget.

After pulling the turbo down i have found there is no shaftplay and the bearings had already been replaced when i bought the turbo cool...

the aim is to have a turbo that can produce 210RWKW or there abouts on an RB20 and still give reasonable spool up without having to run greater than 1bar to get the power required...

Step one took of exhaust and compressor housing.

I machined out the exhaust housing out to 50mm.

I then machined out the compressor housing to take a To4 V trim compressor wheel (sourced from GCG for $105) this wheel fits on the shaft of the turbo without modification. The only way to do the machining is look at the wheel and look at the housing and see how much needs to come off.

This was done on a lathe and took a while with lots of test fitting. I then machined out the compessor inlet to 50mm.

The turbo is ready to go together but i want to replace the ceramic turbine with a metal one. does anyone know a turbine that is a direct fit? as in the same shaft size and will fit in the rb25 housing?

Most of this info was derived from boosted"s thread about his vg30bb turbo but i wanted a turb based entirley on the t28.

i also have the to4e part number if anyone wants it.

i will add photos and results as soon as i can get a compressor wheel thats not ceramic.

[gtst25]

I'd be interested in the part number! I'd like to see how it all comes together as I'm thinking about hi-flowing also.

Cheers!