Has anyone ever considered adding a 12V fan to the input of the airbox to generate a little more top end.

In theory more air being forced into the system will generate more flow. But taking the airbox cover off does the same thing but when riding in wet and muddy conditions tends to get a little moist for the filter.

Any ideas on this???? Where you probably wouldn't want the fan on all the time a switch on the handlebars would make it much easier to turn on when needed.

 

Unless your fuel injected, you'd have no way of compensating for the extra air when switched on.
There are ways around it though, but they're messy.

So, either you'd run rich all the time waiting for your extra air boost, or you'd run normal and only be lean when switched on.

 

In theoy based on the diameter of the air intake, a fan should not hurt anything.

Correct me if i am wrong but, for good top end speed you would want it a little leaner, as per the way the original air intake is setup at the front of the frame the faster you go the faster the air is getting pushed into the air duct. But with a small fan pulling that air into the engine would speed up the process.

 

Sorry. I think in terms of boost (PSI).

A "fan" won't do anything but waste electricity.

There is an extremely high powered fan called an E Ram that has the muscle to increase air flow into an engine.
The only problem is, you have to tune your engine while running the fan (top end) so you don't lean out when using it.
Also, you'd have to re route your over flow lines and vent lines from your carb into the air box so your entire carb remains pressurized during the boost.

Remember: Air doesn't make power, Fuel Does. The more Fuel you can squeeze into your engine, the more power it will make. To allow more air into your engine without leaning your air/fuel ratio out, you must increase fuel. Simply increasing air into an engine without increasing fuel, won't gain you anything.
Like I said, it's messy. But entirely possible!!!


A simple "Fan" won't do anything though.


Mike

 

Totally true - - if its FI

So all of the people that have their airbox cover off - - - put it back on because its a waste.

I may have used the term "blower" incorrectly...... It should be a safer way to increase airflow without jeopardizing flooding your engine in a mud hole.

 

Ok you said put your airbox lid back on because its a waste?? I wouldnt say that Mine ran better without a lid, In fact I liked it so much that i took the rest of the airbox off too!! It works much better now than before

 

Now I didn't say that you couldn't remove your air box and up your jets to compensate.
I said that if you add a high volume fan to the intake without compensating for when the fan is on, you'll lean out.
Just like removing the air box lid and not upping your jets. (not the best for an engine)

 

I don't think you would notice any difference if you used a fan it won't put out enough air.

 

Here is the situation...... it is probably different on the newer bikes. There is an air intake on the side of the airbox that has a rubber hose that connects to a 1 1/4" tube that runs for about 2" then flattens out and runs under the gas tank to the top of the frame, where it only has an opening of 1/4". This is where it seems like it would help if it was able to suck more air in.

Thats all I was thinkin, that a little more airflow would be more of a benefit than a burden.

 

Everyone here seems deadset on their opinions. I can see both sides of the arguement. Hondawontdie: I would suggest just doing the mod and seeing for yourself what happens. Sitting here talking about it isn't really going to make it right or wrong. Post the results if you do try it.