Tellowman24

thiers company out there that makse somethign like this for Supras, except the headlight remains fuctional and has a like 5 inch hole in it

suzukidragracer

The ram air effect will not produce any significant gains until at least 80-100 MPH.

There is simply not enough pressure over that small of an area to force any extra air into the intake.

Ram Air Induction has been used on motorcycles for quite a while now, Yamaha even posts HP numbers with and without the ram air effect, for their YZF-R1 it's something like 179 HP and 187 with the ram air effect taken into account. (Engine HP, not RWHP)

The trick is to have the largest opening possible and have it funnel down smoothly to the intake tube diameter (venturi effect) , and to have this large opening positioned in a high pressure area.

My best guess would be the ideal high pressure area would be in the center of the front grill, but that would just look stupid and your intake tubing would not have a very straight shot into the TB.

The headlight area would also have pretty high air pressure but try to position the tube as close to the middle of the car as possible.

Another good high pressure area is at the base of the windshield, that is why some 60's and 70's factory hood scoops have the opening facing the windshield not the front of the car.....it really does work!

Again though, the only way it is going to create a ram air effect is at very high speeds, most likely over 100MPH.

BUT, YOUR CAR WILL BE GETTING FRESH, UNRESTRICTED COLD AIR WITH THIS MODIFICATION SO YOU CAN EXPECT THE SLIGHT GAIN THAT GOES WITH THAT!

Hope This Helps!

Vince

suzukidragracer

Oh, and if you still want to try to get a ram air effect..... YOU MUST MAKE SURE EVERYTHING ALONG THE INTAKE TRACK IS SEALED!!!

Any leaks at all and all gains except from the cold air will be lost!

~Vince

2VNA

I might be able to cut the entire section out from the turn signel is over to the complete right eadge of the light and funnel it down to fit over the back of my filter. I beleve that the od of the filter is 5". I will have to keep looking into this. but I think it would work.

suzukidragracer

I think it would work just fine.

The added benefit of unrestricted cold air induction alone would probably be worth it.

The idea behind a large opening funneling down is for the venturi effect, which means that as the air path gets smaller the air will travel faster, creating a higher pressure area inside the intake tube.

Similar to an airplane wing which is a half-venturi effect, the wing is curved on the top and straight on the bottom so the air on top travels faster to meet the air on the bottom of the wing at the same time.

Vince

2VNA

Thanks Vince, I am going to start looking into this mod, I hate to buy things like this that I can do myself so I will see how it coms out.

suzukidragracer

Sounds good. Let me know!

Doesn't seem like it would be too difficult, and cheap for sure!

2VNA

Ok here I go again with that thinking thing, If I could find a round or rectangle subwoofer cone that was pliable then that would fit into the hole nicely. The thing would be getting one that was flexible and large enough. The reason I am looking into a flexible one is so that it will fit the curve of the top of the headlight. Or I could make a plate to fit over the top????

I need to find a bucket of water with all this thinking incase my single brain cell catches on fire.

2VNA

after looking at the light the hole in the back is 4 and 1/8" that is the same as the MAP so if I took and got a 9X6" with a 5" hole cone I could mount this in the light and then taper it back up around the filter where I could seal it. I can't go any larger than 5" od due to the fact that the mounting pins for the light are on eather side of the hole in the back.

djdalfaro

This sounds very interesting. Could ya give us updates when you get done, if it works I might go ahead and try it for my own. Thanks

~Alf