Hello, H-T!

From my understanding, a front facing, cold-air intake through ones front bumper would obviously take in some cooler air than say a short-ram air intake. But what about pressure? I've been looking around and can't seem to find any information on it. How much (if any) pressure would you gain from having a cold-air intake that faces forward through your front bumper/grille? 1 psi? .5 psi? Anything?

Sorry for the noob question but I can't find anyone mentioning it!

Here's an example I found.

 

When doing a lot of reading on engine building the sources say that the increase in "ram" pressure with a ram horn is negligible.

By that I mean you remember the big *** scoops you would see on the old muscle cars to help "force" air into the carb on Naturally Aspirated carb muscle cars... Turns out that those scoops didn't add much at all.

The only real way to add more air is forced induction.

I think the sources were saying at 100 miles per hour it was like less than a 1% increase or something. Nothing to even consider really.

The temp of the air is more significant.

 

Exactly the answer I was looking for. Thanks!

 

Plus rocks, dirt, debris, rain, etc. can get in there on the picture you showed. It looks like a K-Series might be in there, I'd hate to mess that up for a possible gain of a couple horsepower.

 

To have any chance of this working, you at least need a velocity stack. There isn't enough air directed specifically to this inlet to have any effect otherwise.

 

https://en.wikipedia.org/wiki/Yamaha_YZF-R1

Look at the with and without ram air hp of the Yamaha R1.
From 172 crank hp with out ram air to 180 crank hp with ram air.
That is a 4.5% increase in hp from the added ram air effect.
4.5% x 14.7 psi = .68 psi
Take it with a grain of salt, because of different engine efficiencies, ram air designs and air speeds etc....