Originally Posted by dyn085
In non-RACECAR driving (below 3200 rpm), the Typhoon was showing roughly 5 hp less, with up to 8 ft lbs less tq.
Another thing to consider here is that you're at WOT on the dyno. Will the effect you're seeing at WOT at those RPMs (below 3200 rpm) affect real-world, part-throttle driving at those RPMs in the same manner? A dyno works great for finding max hp or torque at a given rpm, but isn't really a tool for part-throttle efficiency analysis.
I keep close track of MPG tank-to-tank, and I saw no noticeable change in MPG going from the stock intake to the Typhoon. I would be more willing to believe that anyone who sees a drop in MPG with an intake swap is using more go-pedal because he likes the sound of the new intake.