Werd
I dont doubt that the miata engine can handle boost well from the factory.....thing is, most cars that are factory forced induction run anywhere from 8 to 15# boost....and even those cars have to be internally upgraded to handle almost double the boost. I really dont think a manufacturer like Mazda (not exactly a top Japanese automaker...and by that I mean not on par with say Honda or Toyota) would over-engineer the engines to that extent in just the Miatas...
Stock-ish boost levels i can see.
Maybe I'll just put the 'ole Camaro on a diet

hehe