R1 engine cold air feed

[teabagger]

Hi all

I've seen a cold air feed airbox fitted to an r1 engine in an MNR .
The air box enclosed a foam 'sausage ' air filter. A section of pipe feeds cold air from the front of the car to the air box.

I know that bike engines are designed to run using ram air- a feature which is normaly missed off on a BEC.

Does anyone know if this kind of air box setup is availabe to buy or is it a DIY thing only?

Thanks for any info.

[Snake the Sniper]

The cold air feed is precsiely that. Most 7's won't be going fast enough to generate much in the way of ram air. It might gain you a bhp or two over and above that gained from the cold air. I personally wouldn't bother with any ramming effects, although a cold feed is always worth doing.

[Furyblade_Lee]

my R1 just has a ducted cold air feed from below the headlight. It does get a healthy blast of cool air at 135!

[rhinochopig]

My westy 'bird had a proper airbox with an S-shaped feed straight up to the bonnet vent (all part of the airbox). I've never understood why this isn't more common on becs to prevent heat soak.

One of the neatest installations was a chap that cut a carbon end can in half (actually 1/3 - 2/3), put the larger section over the intake trumpets and then ran a duct to the front of the car. Looked really smart and I'm guessing was also pretty effective in a) reducing intake temps and b) reducing induction noise.

[teabagger]

any pics of these mods chaps?

I need some ideas as it sound like I am going to have to construct something myself.

cheers.

[rhinochopig]

teabagger said:

any pics of these mods chaps?

I need some ideas as it sound like I am going to have to construct something myself.

cheers.

pic of megabird airbox



ETA

The carbon end can looked a bit like this, except the other end of the can was plugged.



~~~~~~~~~~~~

Yes Snake that is an injected engine

Edited by rhinochopig on Tuesday 28th April 21:59

[Snake the Sniper]

I'm guessing that's an injected engine, as there's no way that would fit on my carb'd bird. I just use the Honda airbox on mine, as it does a damn good job of keeping the noise down.

[teabagger]

that carbon intake looks very nice

I may try to knock something up. ( though it will not look as nice as the one in the pic!)

[mikeveal]

The usual reason for boxing the air filter is not power, it's noise.
If you're planning on trackdays then every little helps. My Skunk makes more noise from the open sausage filter than it does from the exhaust.

As others have said, you won't be going fast enough for ram air to have an effect.

[rhinochopig]

mikeveal said:

The usual reason for boxing the air filter is not power, it's noise.
If you're planning on trackdays then every little helps. My Skunk makes more noise from the open sausage filter than it does from the exhaust.

As others have said, you won't be going fast enough for ram air to have an effect.

I have to respectfully disagree. Hot engine bay air is much less dense, so less oxy in the fuel/air charge = less power.

Boxed cold air feed = more dense air = more power.

Yes it does reduce noise, but it also reduces intake temps.