Hmmm... I had always thought the stock vent was air rushing into it (like a scoop.. just a small one). This mod might be worth a look.

mitsuorder, you plan on making any anytime soon?

 

You can fab one in about 10 mins, why buy one..

 

yeah I'm making 6 today.

 

Please do this, I'd be very interested in the results.

 

Not sure if rain will be such a big problem.

Most sportsbikes have ram air intakes, my zx6 does and it's basically plastic ducting feeding directly DOWN into the air box. The opening of which is wide open to the elements. I believe ram air systems are supposed to work at 90 mph plus ???, and at that speed any rain ingested is going straight into the air filter and then onto the engine. I think so long as you're not pouring a cup of water or something into the engine, it's not going to bend your rods. Besides, water injection has been around for years as a method of gaining more power. With the scoop on the Evo, the intake forces it upwards, so probably even more unlikely you'll get a gob full of water in there.
Finally, isn't there a HKS intake or something for the Evo 7 that uses a similar ram air intake ?

On another note, the ram air on my zx6 really did work. The spec of the motor is 100 hp, and me an a few friends did a flat out run in Montana one year. My friends had a VFR750, Suzuki R?900, and a CBR600. My zx6 topped out at 154 on the speedo, 100mph and above it pulled away strongly from the VFR, even though on paper the VFR was rated at 108 hp or something. And I was pulling on the Suzuki (rated at 115hp ), but had to call it a day as the freeway had many "little hills" and you couldn't see **** what was on the other side - a bit like russian roulette

 

I posted a template to make a scoop.... check it out....

https://www.evolutionm.net/forums/sh...threadid=86878

 

rain in intake is not a problem, if you guys have heard of water injection it doens't hurt the engine. just don't suck up water, that would be bad, but a few drops through the filter or even more than that won't hurt anything.

do you guys think there's anything that can be done to combine this type of mod with the brake cooling scoops, those are plastic (the ones by mitsu) and aluminum ones would be great!

 

I disagree. A waterlogged filter isn't going to let air through when saturated. Water injection systems inject a fine mist of water after the turbocharger and intercooler. That is completely different than what could happen if water found its way into the airbox and saturated the filter and messed with the MAF sensor. The MAF sensor uses a heated wire's cooling rate to tell how much air is passing through the intake. If it gets wet, that will mess with the MAF and cause potential damage to the engine. It's not much different than getting K&N Filter oil to blowby onto the MAF sensor.

I still believe that for the little HP gain if any of this mod, it is not worth the potential problems. My 2cents.

 

Yes, I have purchased a set of brake cooling guides to try and machine/cut out of aluminium and I am still working on that. I was testing to see if they kept the wheels cleaner by blowing extra air from the inside out and they don't.

I have talked to others about making them out of metal and thier concern was that they have the plastic ones and dragged them and the broke off clean at the bracket. If the Aluminium ones were too stiff the same drag could cause some damage to the suspension attachment point.

So I have kinda backed off on the idea.

 

I agree on the water logged fiter.... I live in an area with high levels of rainfall. I ran in the rain with my scoop installed and the next morning the water spots never made it past the 90 bend at the cross member. they came up and blew off the sides of the scoop. This shows that the gains are not substantial in increaded air flow but the water risk is very low. And when you live some where hot or at altitude thin hot air sux and every little bit helps. even 5%.

 

Any updates on this? Just curious if you guys are still using the duct?

Would like to get one of these if someone still has one

 

I posted a how to.

https://www.evolutionm.net/forums/sh...threadid=86878

It tells you everything that you need. It is $5 to make one , unless you have to buy tin snips, drill, drill bits, .....

I use mine all the time. It does make a difference. I put window screening over my wire mesh or the driver side radiator opening to keep bug and rock out. With the scoop in place and screening my temp never moved. When I take the screening off and drive around I get 5X the number of bugs in my airfilter. So it is pulling up some air off of the radiator.

It only takes an afternoon to do. A screwdriver, and 10mm socket to install/remove. It is worth it.

 

any Dyno updates? does this item really work like it suppose to? I'm just a little sceptical.

 

Actually someone did some logging for some runs and had a noticeable decrease in intake temps. That was using a cone filter, though. I'm not so sure what the difference is when using the stock intake box.

 

It would probably be hard to dyno this mod... You need the air flowing like it would be under normal driving.