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IHI RHB31
The smallest turbocharger we’ve seen fitted to a production engine is
the IHI RHB31. This turbo is used on various Japanese Kei-class cars
including Suzuki and Daihatsu.
We’re told this particular turbocharger comes from a Suzuki 660cc engine
which, like all Kei-class engines, is limited to 47kW. Experience tells
us this turbo can be wound up to more than 1.0 Bar of boost and about
75kW – but don’t expect it to last very long. These very small turbos
aren’t particularly durable, despite having a water-cooled core.
The compressor inlet of this little ‘un is less than 30mm and the
discharge nozzle measures 26mm diameter. A 2-bolt flange is used at the
compressor inlet and discharge nozzle – there are no slip-over hose
joints. The turbine wheel is fed exhaust gasses through a 24mm diameter
passage in the triangular mounting flange. Three bolts attach the
turbine to the exhaust manifold and four bolts connect the dump pipe.
The extremely compact dimensions of this turbocharger allow it to be
mounted in very tight spaces. If you’re keen, you could probably squeeze
a pair of these turbos under the bonnet of a N12 Nissan Pulsar/EXA
turbo. Alternatively, you might have a small-to-medium size motorcycle
you want to turbocharge...
Om man kan Engelska vill säga.
Tillverkad i Kina om det kan vara av intresse.