Originally Posted by onehundred80
... the horns did not scoop (ram) air as others believed. The reason for them having any effect is now put down to reducing turbulence. That I can believe......
.....As I stated before if the devils horn was of any real benefit then we could expect to see them on F1 cars etc. But F1 car bodies are obviously designed to reduce turbulence around the air intake as Rob has stated the devils horn and the filters do.
correct, the devil horns are not a "ram-air" as there is no positive pressure produced into the intake at any realistic speed (i want to say 260mph is where they would "start" to create boost but id have to look ti back up to verify). the horns do a few things, first off we are able to utilize a very nice mandrel bent radius for the air to enter the system. the prolonged length of the horn is to reach out and grab the freshest/coolest air we can. this is not a perfect system by any means, i am the first to admit that. again i would have LOVED to be able to fit the bellmouth inlet i linked to above. it just wasnt going to happen while following my number 1 rule; "NO NEW HOLES and no oem part is damaged, everything can be reverted to stock if needed". maybe some day we will figure out a suitable location for it on the xfire but i havent found it yet, sorry.
these airflow properties are absolutely used on f1 cars, look right above their head rest and you will see their air intakes. while they are usually formed into a triangle shape to conform with the aero of the body there surely have a very nice radius on them.
then look at high hp drag racing engines and notice how they have the bellmouths formed right into the front bumpers, again to grab the coolest air as efficiently as possible.
obviously the devil horns are not a perfect air inlet but they are much more efficent than the straight cut sharp edge.
we do not see them on nascar bumpers though, my guess to why not would have to do with the damage the cars take while "rubbing", but thats just my guess. ya bet your butt there is a smooth air intake under the hood though.
idealy on a drag xfire, id pull off the hood and attach from the throttle body a 135deg bent upwards elbow (teflon coated of course) and attach the bellmouth (teflon coated) aiming forward. if we could get it to stay on without blowing off at high speeds that would be as efficient as we could possiby get to the throttle body. of course that opens up an entirely new can of worms with potential foreign object damage
