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Can A Pair Of Sr20 Turbos Be Fitted To An Rb26

haw001

By haw001,
in Engines & Forced Induction

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haw001 Rising Star

haw001

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I've got the turbos out of the road car and one of them, I can't tell which is blowing smoke through the exhaust.

I'm on a tight ass budget here, and while I can get the standard R32 turbos rebuilt, I'm not a big fan of the ceramic wheels so I'm a little reluctant to spend money on them.

My goals are not power orientated. This is my road car, daily driver, to and from car. I've got race cars which I play with, so I'm after economical in both purchase and running. Immediately after finishing this post I'm moving on to putting the new KME lpg system in to the car so that should give you an idea where I'm coming from.

I've checked on getting steel wheels on the T28s and that's going to run about $1k each, which is not in the budget. I can get N1 wheels for about $1250, but again, that's not in the budget.

My thoughts are using a set of turbos off a pair of SR20s in the RB26. I believe they are steel wheel, and/or there are cheap Chinese turbos out there for about $300 each. I'm not afraid of using the Chinese turbos, the quality has increased greatly on these things and I do all the work myself, so if the thing shits itself, It's just a little more time for me in the shed.

So big question is, has it been done, and what are the possible problems. As it is, I believe the exhaust inlet flange is the same, but I can't tell on the exhaust outlet. I believe that air inlet is the same, but I'm not sure if the angle is right, and I know that air outlet flange is different, but that won't be too hard to change.

Must be a few people out there that have done the reverse from GTR to RB20, any help would be appreciated.

allthewaytotheskyline Mentor

allthewaytotheskyline

Posted
Posted

not exactly the answer ur looking for but from what i have seen you can get a pair of gtr turbos second hand for about $400...

why not sell the sr20 turbo's and buy some gtr turbo's?

Risking Grand Master

Risking

Posted
Posted

Theres nothing wrong with the ceramic wheels if its just a road car.

Buy a second hand set for sub 600 bucks and be done with it.

There is a pair of R34 turbos in the for sale section for stuff all.

SR20's have a different exhaust housing and the compressor housings are also different. I dont know if the comp housing is interchangable with the GTR but the exhaust is not due to the wheel diameters.

haw001 Rising Star

haw001

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Haven't got anything yet, so I'm just looking at ideas for the moment.

Are you sure the casting on the rear of the turbo is different? From pictures the rear housing seems to be the one thing that is common among the 2, in both inlet and outlet.

The front housing is totally different, it seems the mounting holes for the inlet are out by 90 degrees. Led me to wonder if a GT28 hat off an old GTR turbo could be easily machined to fit. They should by rights be similar.

Still might go the old ceramic route, but my main concern is that the occasional higher than normal squirt of boost could make the thing come apart. I usually run around 14-15 psi, which is more than recommended for the ceramic wheel turbos. A newer set of turbos could make this a less likely problem.

Thanks for the advice.

haw001 Rising Star

haw001

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SR20 wont fit and housing wont change over as wheels are differrent.

Wheels are different for sure, but they can be machined to match provided the hats are of the same diameter and the profile of the t28 is not larger (can take material away, but adding is harder :blush: ).

All pie in the sky at the moment, but I'm curious

discopotato03 Grand Master

discopotato03

Posted
Posted

Turbos native to or intended for twin RB26 std manifold apps have the unique or what Garrett call "compact" T25/28 or GT25/28 turbine housings . The dump flange pattern is different to generic GT25/GT28/SR20 .

The compressor housings are designed to suit the RB26's air in/out and they have the two mounting eyes for RB26 turbos fluid plumbing fittings .

With the amount of work involved in removing and replacing RB26 turbos I'd be wanting to be real sure that they were designed to work properly on that type of engine .

Cheers A .

haw001 Rising Star

haw001

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Yep, starting to sound too hard. Not one to shy away from a challenge, but in the midst of an engine rebuild, 2 race car builds, and an LPG installation on the go, it might be worth putting it on the back burner.

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