Reid is absolutly correct on the rules. You can't just look at the UTV rules (BITD) and come to the conclusion that it says nothing about turbos so therefore it should be permitted. If you read the ENTIRE rulebook you would find the following:
SCR33: TURBOCHARGERS
Turbocharges only permitted on gasoline-powered vehicles in classes listed
below.
Special Note: Ford Production EcoBoost turbocharged V6 gasoline engine
allowed in Class 7200, 8000 and 8100 only.
Factory installed or aftermarket turbochargers are permitted in the following
classes: 1400, 1500.
Its a little naive to just say its factory so it should be permitted. Manufacturers in all forms of motorsports have models that you can get "factory" that don't fit in certain classes for one reason or another. I'm sure CanAm knew the rules before they decided to up the HP wars in this manner. If the target market for their HP King was desert racers they would have found the HP in another way. No, they are marketing to duner and the "got to have the most power so I can putt around the camp in style crowd".
Now I'm in no way against progression of four wheel drive golf carts but dictating racing sanctions to change the rules to suit a particular "layout" only does one thing... drive up the cost for everyone. Allow turbos and it is going to very quickly disrupt a fairly level playing field.
Want an example? Look into the history of streetbike racing. The 750cc was the Pro class for factory available bikes. Sure there were larger displacement sport bikes but the "PRO" class didn't allow them. Every boy racer in town had to have a GSXR750 and why not, they weren't much more expensive than the 600s. Along came Ducati bitching about how a V-twin couldn't compete CC for CC so they strong armed a displacement increase for the twins. After that they dominated for a long time with Fogarty behind the handle bars. Eventually the Jap companies got a displacement increase so THEY could compete. Completely killed a once thriving class. And guess what? The OEMs base price on size of the motor even though it might only cost pennies more to produce than a smaller size. On top of that, now you have to build a new bike every year to stay competitive with the constant "progression".
So unless you want to kick off a major price climb, let the turbos race in the SR1/unlimited but leave them out of the "PRO" class. The question shouldn't just be how will the turbo effect racing, It should also be how will catering to the turbo effect the market?