just data fellas, it's all just data....pick what you like to run with...I like the design of Rob's, hell, I even like Rob...but, it's your money, he's just giving you the data....doesn't mean you can't run what you have now...but, there are a lot of claims out there, but, look who's running the times at the track. If you aren't into to drag racing and just looking for performance, you could get by with less...I like the looks, and was very skeptical about moving from the single to the dual, but having just romped on mine with the single, having Rob install the dual in the parking lot of the hotel, and taking her right back out again....well, it was instant throttle, instant accelleration, and this "sucking" sound that only a man can dream about, coming from the front of my car....I was convinced...with that said, I hate engine covers with a passion...so, even if the air boxes flowed better, I would still run the tubes....just me...

 

I do not find your comments offensive, everyone is entitled to their opinion. I was only trying to make a case for my belief that 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.
If the air available at any speed is more than required then the 3% gain is actually even less. That is if the 3% stays the same over all air flow volumes.
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

 

im pm'ing ya

 

Could you PM me with the same answer. I have the horns but have not installed them yet, thanks!

 

send me your email addy and ill forward the pics to you. it appears it can be done and maybe with my aftermarket grille it was to close to allow the grille to be mounted. i notched my tubes and am happy with the results. im thinking the tabs that mount the grille can be trimmed if you were to run the dual cai instead if notching the tubes. because my fiters are still in the oem location the notches i made have no affect on the setup.

 

bump for the 2 guys that asked me today about sl55 airboxes through email