Posted July 10, 2000 - 07:18 PM
Why not take a small (2-5") 12-14V electric fan and mount it on the clean side of the airfilter, wired to maybe the taillight or another self-made switch? Maybe even to a rheostat that works off the TPS signal to increase fan speed with throttle position? I would imagine the fan would have to be able to hold up (not catch fire!) when exposed to low voltage such as idling. Actually fire (spark from the fan) may be a good reason to consider mounting it to the outside of the air cleaner somehow.
Any thoughts? I think it could be done safely and purposeful, the question is what do you think would happen to the performance? Would the air velocity possible decrease due the lack of need to "suck"? Anyone crazy enough to have tried this one yet? ANyone think I'm crazy for posting this?
I have one of those mini battery fans I was going to temporarily install in the airbox pointing into the filter before the next ride to give my theory a try. Nothing scientific like dyno or intake flow meter, just seat of the pants. I was going to try using both the airbox lid w/ snorkel in and with the lid removed. I can't tell much if any difference in power with the lid removed (00 WR timed)now, just more noise.
What does everyone think? All comments welcome, slam away
Posted July 10, 2000 - 07:27 PM
Posted July 10, 2000 - 07:41 PM
Hey Jay/Kevin, what about an R12 intake air or fuel cooler? Just kidding!
Posted July 10, 2000 - 07:48 PM
Posted July 10, 2000 - 09:15 PM
As we have seen before, there is always ONE in the crowd that has to throw his two cents in.
There is always Nitrous oxide!! You could use it on the start and smoke everybody, (maybe your engine too?)
The real important question is what kind of beer??
[This message has been edited by Kevin in New Hampshire (edited 07-11-2000).]
Posted July 10, 2000 - 09:24 PM
They used a “modified” motor from Radio Controlled Cars to power the fan. My experience with those motors in the past shows that they would not stand up to that type of abuse.
I would think that the packaging constraints alone would be a nightmare.
If you are still interested you might post something on the board at www.atvconnection.com
Posted July 11, 2000 - 12:04 AM
I spend alot of time at work working on turbos with 1.5m diameter compressor turbines.. these engines run a boost pressure of 3bar.. thats over 42psi!! pokin out over 5500hp.. imagine having 1/100th of that at the rear wheel!
Mitch is getting closer though!
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Posted July 11, 2000 - 06:20 AM
I have seen a small lawnmower engine with an airpump from a car or something setup as a supercharger. It was belt driven I think and it turned a 3hp engine into a 5hp engine. Now if you could find the right size pump & drive it from the crank.
But seriously, with any of these ideas the HP gains would be offset by weight gains. That is if you are using your bike as a dirt bike, now if you are using it as a drag bike....
Posted July 11, 2000 - 07:49 AM
Granted, there is some heat transfer through the center housing of a turbocharger but the aftercooler ( not an intercooler unless it is multistaged compression ) is there to offset the temperature increase due to the compression of the working fluid.