leighv's Forum Comments
Showing all comments by leighv.
Cold air intake tip is incorrect!
As mentioned in one of the earlier posters, since colder air has greater density, the throttle position for a given load will be less. I believe that the reduced throttle position increases pumping losses.
Also, cold air might hurt fuel atomization for some cars (perhaps TBI and carbs for sure) at the typical part throttle operation engines see. Fuel atomization is not as much of an issue at WOT because the charge speed through the manifold/ports/ into combustion chamber will be at its highest(at least depending on a particular engine's geometry).
For port injected cars with high horsepower motors, I would make a gamble that colder air has greater effect on economy, as large injectors (at least from what I read from performance books) will not have the greatest atomization at the low outputs to make the 20 - 30 hp going down the road.
I hope it doesn't sound like I am talking out of my ass, and that I am making sense.
posted by leighv October 9, 2011 at 9:33 PM