Originally Posted by BLKFIN
My logic is the ram air effect of the SL55 intake. I love the needswings dual set up, it looks amazing and I know it will flow well, but I find it hard to think that it will out flow the SL55 set up like mine once the car is moving. The needswings will always be sucking in air and making the 90 degree bend from the front of the radiator to the engine compartment. At 60, 80, dare I say 100mph, I will be forcing a lot of air into my intake just by the shear velocity of the car moving. The single needswing and the stock SL55 dyno’d the same with no assistance of the moving car and I have not seen any numbers from the dual. At the end of the day, they both are a huge improvement over stock!
Actually you won't be forcing any more air in than if the car was standing still. My background is in aviation and in order for ram air to be effective, you'll need to reach speeds well above 100 mph. Even then the ram air effect is negligble. There's very little increase in static pressure at low speeds. Therefore you won't see any 1/4 mile difference between your setup and a vehicle without ram air. Maybe if you're racing 1/2 mile distances 150 mph+ will you notice any difference.