**First Time Poster**

O.K., So I got a bright Idea to boost my Visionmotorsport buggy with the Gy6 Motor (150cc). I went down to O'Reilly's and bought a marine exhaust fan that darn near fit perfectly on the intake hose of the buggy. Well, almost, so I went to home depot and bought an adapter tube to make it fit. I took off the exhaust to allow the engine to breath easier, opened it up to WOT, and turned the little sucker on to see what would happened. Engine bogged down immediatly. I ran it without it on just to make sure the airflow wasn't being restricted from the blower fan I installed and it ran fine. I am assuming it wouldn't run turned on due to lack of fuel, which is what I thought would happen since I haven't rejetted or anything. So my question is has anyone thought of doing this and how do I get around the fuel issue. I don't even know how much boost is going to the engine yet (Im guessing between 1/2 pound to 2 pounds), but my buddy said I can buy an electrical regulator to control that. I'm assuming I may have to get an electrical fuel pump of some sort. I'll admit I don't really know what I'm doing here but I thought it would make for a good experiment. Any pointers would be great. Thanks, James

Heres the buggy I have if this helps http://www.visionmotorsport.com/z-2150.php

If you do not get the fuel rich enough, you will turn the engine into a melted peice of aluminum. Running an engine lean will build up alot of heat and seize the engine. I have seen it before and it's not pretty.

RH

Fuel management with any super charger or turbo is essential. Your engine will require less fuel at idle and while you are not WOT and then more as the demand increases. I would imagine you are gonna need to have something that will change fuel curve with timing and air management all in one process like a computer controller. I have thought of this very thing over and over and I can tell you I have not seen any back yard contraption made that does the job. You may be able to get something to work but most likely you will only be able to use a very small amount of boost and I mean VERY small. Of course you will need to re jet the carburetor. A hotter coil will be a must as well as very free flowing exhaust.

How about electronic fuel injection?

Thanks for the replies....

I found a shop locally here in K.C. with unlimited parts and supplies.
The owner claims to know of a guy who did just this, apparently with some success. If I can find out how he's done it I'll post his setup.

First off, the vent fan you are using is meant to move a large volume of air, but it can't "boost" intake pressure much at all. I would be very suprised if it was even close to 1/2psi.
If you do find a way to pressurize or boost the intake, you will also have to pressurize the fuel and the overflow vents on the carb to keep things balanced. You can connect the vent tubes to the intake tube after the fan, but the fuel is another story. I don't think you will be able to just re-jet - you would need a fuel pump, or maybe raise the gas tank to increase the pressure in the fuel line. Also, there is probably a vacuum activated fuel petcock that might give you trouble.
Keep trying though - maybe you'll find a new way to squeeze some more power out of the 150s. I have been thinking of trying the same idea, but never actually done it.

Tim

I think you are pissing up the proverbial rope. Think about how much ait the engine is sucking in at 7,000 rpm's. There is no way an electric fan is going to move that much air. Heck, at anyting above a couple thousand rpms it's going to be a restriction to airflow. Think about how a supercharger or a turbo works. The faster the engine spins, thefaster the turbo/supercharger spins. An electric fan is going to be a single speed. The turbo on a car can exceed 100,000 rpms at wide open throttle! While your at it you can get the tornado thingy and double your fuel economy!

i dont think that tornado thing will double your fule economy.

This was a topic that was talked about quite a bit maybe 2 years ago but I can't find those treads, they may have been pruned from the site, Steve?

Any how from what I remember in that discussion, this was not going to work due to the lack of exhaust pressure produced.

Maybe Steve can go into the archives/backups and find those posts and repost them....

The above post relates to turbo units not those of the electrical variety