[blackrosenova400]

Originally Posted by Tachyon

With an HX-40 I would use a SMIM over the Cyclone because the turbo can supply sufficient airflow that it makes sense to make the engine more efficient in the upper RPM range.

I agree, it would not be a good choice for comparing it to a smim for 1/4 mile drag racing and overall power. But for a fun street car, and maybe the 1/8th mile, I like it!