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Rb25 T3 Turbo Rebuild

matthewcucuzza
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matthewcucuzza Rookie

matthewcucuzza

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I purchased a few parts today for my turbo setup which included a std rb25 turbo which is blown. im wondering where in sydney i can get it rebuilt or where to buy the billet wheels for them? i cant seem to find them i can only find the garrett turbo rebuild kits.

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https://www.sau.com.au/forums/topic/446655-rb25-t3-turbo-rebuild/
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GTSBoy Grand Master

GTSBoy

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Posted

You could search on here. I know for a fact that hypergear has posted the answer to that very question in just the last few months. The reality is that almost nobody wants a "rebuild", because why would you rebuild for ~$500 when you can get it massively highflowed for ~$800?

discopotato03 Grand Master

discopotato03

Posted
Posted

The ceramic RB turbos were intended to be throwaways meaning no factory (Nissan) rebuild option .

The ceramic turbos are not really suitable for an RB30 because they are too small on the hot side , better off high flowing the standard RB30ET T3 turbo given a choice .

Long story short Nissan used Hitachi ceramic turbine ball bearing cartridges or centre sections in RB20/25/VG30 turbos and like with earlier T3 turbocharged Nissans provided their own housings - hence "NISSAN MOTOR" cast into them .

RB30s even the single cam ones make more low down torque than RB20 or 25 so turboing is easier , don't need small turbos to pull up the bottom end torque - especially in a lightish VL sedan .

You can probably even skip ball bearing turbo centres for an RB30 provided the turbo isn't too big .

Rebuilds . The simplest fix is to buy a new cartridge for a turbo if the housings haven't been hacked up by damaged exploding wheels provided cartridges are available . Basically remove the housings from the old and refit to the new and you have essentially a new turbocharger .

Hypergear would be good to talk to because they hi flow lots of turbos many which have Nissan or alternative housings on them . Basically the old Garrett small shaft T3/T4 centre section is very similar dimensionally to the Hitachi ones so with a bit of machining and re profiling of the housings to suit different turbines and compressors you can make a package that looks and fits much like the standard turbos . I think even the water banjo thread sizes are the same .

I know people new to turbos think any centre section can be rebuilt but the problem is that the bearing housing itself is a wearing part in all of them inc the ball bearing ones . Sadly the turbines piston ring seal spins in the back of the housing at considerable speeds and eventually chews it out . It the turbine shaft has any significant wear replacing the turbine and centre gets exy and for the effort buying a replacement ready to run cartridge makes things quick and easy .

That T3/T4 centre is a true broad minded person amongst turbos and a huge range of compressors and turbines can be made to fit them . Hypergear has gone further with them than anyone I know of in Australia and has made many unique wheels to dial them in . Constant development is a great thing .

If you tell them exactly what you like and hate I'm sure they can brew up something that won't cost multiple thousands .

A .

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