A good machine is not cheap, not like 1,000.00 dollars cheap. If a SHO motor is to the point that it can no longer be freshen up with new seals, gaskets and sensors, in my opinion, it is time to go find another motor. By the time you have a machine shop do just the bare necessaties, you are going to be way past a grand.
Buy a turbo, get some 39 pound Cobra injectors, a high pressure fuel pump and a relation fuel pressure regulator. Slap it all on there and take it to a reputable engine tuner and have him put in a SCT or Diablo chip and tune for 8 pounds of boost. And then go enjoy the snot out of it. If the engine breaks, go get another, freshen it up, slap all your goodies on it and go enjoy the snot out of it also. They're tough engines; TOW survived 3 runs on the dyno with her new turbo, WITHOUT ANY OIL PRESSURE and still put 298 pound*feet to the ground.
If you're absolutely, positively , for real, want to spend machine shop money on an engine, the SHO engine is not the most ideal choice. In my opinion, it is a great, no strike that, it is THE best old technology (no variable valve timing or direct injection) V-6 ever made. And the absolute best quality of the SHO motor? It's still cheaper than most other engines in junk yards.
So let's recap:
It's tough
It's cheap
It takes to boost like a Congress to spending
It was designed and built by Yamaha, a performance company I rate up there with Porsche and Ferrari
It is a work of art. People, young and old are amazed and fascinated by the beatiful intake system. ( And it shines up pretty good too) :woo-hoo:
Just my opinion.
Tom