I can reel off pages of crap about this, but there's no point. It really comes down to whether or not you have the funds to build a race motor with the volumetric efficiency to use (... or need) the extra intake potenial.

When you get the motor to this point, it's so peaky that you also need to address the gearbox, which isn't just a matter of changing the ring and pinion, as this slaughters any notion of top speed, it means swapping in a whole new gearset.

It goes from a $5000 exercise for a nice sound to a $30,000 exercise for a well-performing engine and driveline.

I hate turbo cars, but I've built one, as VW engines don't perform well without a turbo, and I like VWs...