In this mont's GT Porsche there is an article about the twin turbocharged flat six engine that was used in the 956 Group C car. It's like the one about the TAG/McLaren Turbo V6 under the "Mezger's Masterpieces" section. This engine made it's debut in the 935/78 "Moby Dick" and was also used in the 936 before it finally ended up in the 956 Group C. It's not the same engine as the one in the 962, as that was fully water cooled, whereas the 956' engine had an aircooled block and watercooled cylinder heads.

In the pictured Subaru application, the exhaust feeds comes up from below, whereas in the Prius the exhaust manifold would be coming in from above. This turbo uses a V-band to connect the turbine to the centre housing, allowing this end of the turbo to be rotated. And since the compressor housing is bolted into place, it seems easy enough to undo everything and spin it all around until all the entrances and exits are in the right places. Unfortunately, though, the reality is different. Yes, the turbine can be rotated, but this in turn places the mounts for the wastegate actuator in the wrong place. Yes, the compressor cover can be unbolted, but it cannot then be rotated – the compressor bolts into place in only the one orientation!

In electronics it’s called the Smoke Test. Circuit wired-up and complete, the reality check comes when you switch it on.
In turbo fitting it can be called the Boost Test. As in, how much will be developed where in the rev range? If it’s a known engine/turbo combination, the Boost Test is mostly a case of proving the absence of exhaust or intake leaks. But when it’s a completely unique matching of a turbo to an engine, the test assumes critical importance. Will this system work at all?

So it was with more than usual attention I watched the boost gauge, weeks of work hanging in balance....

Well, after all the rumours and passing comments as to the existance of a turbo Zeal it seems that Rapid Bikes have tracked it down and done a little expose in their latest September 2006 issue. I've scanned it up just for everyone who at one point thought about doing something a little crazy with their FZR's.
Not many details on the mechancials but it appears to have used quite a few FZR600 parts to beef up the engine & clutch to take the increased power. Oh, and as for power...

105 RWHP (45ft-lbs) @ 18,000rpm w/ 18 psi boost.
12.7 second 1/4 mile @ 118mph.