Originally Posted by S0C0nFused
Great job. But you might have induced a problem. You need to look at your MAF counts. Your MAF should produce a smooth line. I found that blowing directly on the filter caused the MAF to produce a 'spiky' output. The fix is to put a shield over the inlet so that the air flows up and around the filter (I have a similair setup on my 07).
Use of the rubber hose is genius. Even if you have a small constriction, the rubber will produce a smooth transition. Might try and find some pieces for mine.
Add >> Oh! just noticed. Your trim piece you drilled holes in. You did not drill near enough holes for any appreciable air flow. If you take the diameter of all the hoses within 1/2 inch of the tube, and compare to the flow of a 3" I.D tube, you get a true flow picture. It's amazing how restrictive even small hole punched metal is. However, As it appears you shaped the end section (the scoop as you called it), then actually, your pulling air from behind the bumper. That may be a low pressure area due to the design of your front facia, but may negate need for the diffusser. These are all just fine tweaks. Nice job overall!!!
Thanks for the suggestions! :)
All of what you noted here was considered before making the venture. The factory inlet to the box blows directly on the filter so I don't see there being a problem with that. Also the air has to travel at a 90 degree angle once inside of the filter to reach the throttle body. At that point it's sucking what it needs to anyway.
The "scoop" cut only extends to the outer most edge of the drilled section. Not from behind the bumper. You can see the end of the hose is directly in line with the end of the triangular cut out.
However I do agree the holes could be doubled. And just may down the road. But I didn't want to open that area too much as it appears the ECU is mounted to that fender well. I also didn't want it to be too obvious and take away from the front end's over all look.
So far I am very happy with this set-up. Just received and installed my K&N last night, and ordered up the Outerwears Pre-filter a second ago. They have to be custom made. If anyone else is interested in a pre-filter, which is great in general to keep junk out of the pleats, let me know and I'll hook you up with the salesperson that has the specs.