Theory correct?

[RedRider_AK]

From what I've heard, a stock airbox pretty much IS a cold air kit (no hood to accumulate heat in)

[Kevo225dx]

A 250cc, 2-cycle engine displaces .0088 cubic feet per revolution. At 8000 rpm you will need 70.6 cfm (8000 x .0088). So, you'll need a bigger fan.

I wouldn't even try it. You will get much more "bang-for-your-buck" with a milled head or aftermarket pipe. The variable fan will be very difficult to calibrate. You will most likely make it run worse. You could cause a lean engine siezure.

Just my opinion. Take it for what it's worth.

[RedRider_AK]

I agree with that, it's just too hare-brained and stupid to be seriously considering (especially with turbos costing as much as they are now) but it's just blue-sky theorizing, for me anyway.

[Aka_am]

yeah if you want to do something like that..get a gt12 (???) turbo and go that route..

[300rman]

the fan will not help......you need pressure, not volume for a power increase. hook a in-line filter to the end of a leaf blower to keep the air clean, and hook it to the air intake. and then link the leaf blower to to yur thumb throttle so they both rev up at the same time. it adds like 15 extra HP to a car.