Electric Superchargers - JeepForum.com
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post #1 of 3 Old 11-23-2007, 10:18 PM Thread Starter
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1997 TJ Wrangler 
Join Date: Mar 2006
Location: Port Lavaca
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Electric Superchargers

Yeah, we've all seen them on ebay, and we all know that they're such a great deal!
The most persuasive argument/reason that I've heard for them not even being worth their weight in gold is that just thinking about how much air the engine sucks in all on it's own, and the craptacular fans that are sold are really whimpy. So then I wondered, how many cubic feet per minute (CFM) does the 4.0L consume? My first searching shows it consumes 99 CFM with the stock intake (source). Okay, so now even with a "good" intake we are getting air into the engine at a rate of 195CFM.
So in order to have an effective electric supercharger we would need some sort of awesome fan that can pump a lot of air, granted it's not going to be anywhere near as effective as a belt driven supercharger, but it would cost less and be a sort of novelty. One could even hook up a [adjustable] switch to turn it on or off, and even adjust it.
I was searching ebay for the TRD supercharger available for my Pontiac Vibe (Matrix) and found this hunk of junk. I know that "squirrel cage" fans really blow, and this design is similar. That type of fan might, just might, have some potential, but I don't want something off ebay for that use, and besides, I'd imagine that a 4.0 uses a tad bit more air than the 1.8 in my Vibe.
Marine stuff has always been on my good side when it comes to Jeepin'. It has to be water resistant, which makes it suitable for Jeep use. So then I found these, three of the 12V blowers pump air at 250CFM, which is even more that a "good" air intake that flows 195CFM.
Am I off my rocker thinking that one of these beastly motors might actually have some potential as an electric supercharger?

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post #2 of 3 Old 11-23-2007, 11:59 PM
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why dont you buy one and tell us.

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post #3 of 3 Old 11-24-2007, 08:36 AM
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You would have better luck getting a leaf blower to work. Actually I remember seeing an Echo leaf blower hooked up to a Honda on a dyno and it actually made a signifycant increase in HP.
500CFM is useless @ .5psi, you are going to need a fan that can generate serious CFM & PSI at the same time. That crap on Ebay is a poorly designed attempt at parting you with your $$. I guess it works or they wouldn't still be sucking people in...

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