Electric superchargers, are they crap ????
 

Has anyone tried one of those electric superchargers on boat or car ? Read into it and I always said why not a super high speed DC motor ( not a blower fan ) Just curious as they are advertised here as well as on the web .

Crap!!!
From what I understand. And I'm no expert. Is that the voltage required to turn the sc and maintain any sort of boost at high engine rpm is huge and would require large battery banks and a huge charging system. Much more economical to belt drive from crank

I looked at these a few years ago. The electric motors don't have enough power to generate enough boost to make any difference. It has to be on the order of tens of horsepower, which would be tens of kilowatts worth of electricity. That would require huge batteries and huge alternator. Alternators at best are 60% efficient, so the entire system is low efficiency.

Get a belt driven supercharger or turbos.

Michael

http://www.offshoreonly.com/forums/d...ercharger.html

;)

I follow you but thses are super high speed brushless motors . Please understand in no way will they the place of a whipple but for a small car 5 psi is alot and after reading website they only come on under 100% full throttle and no more than a minute .

I mfg several marine and non-marine items for a living and after going to website I think its possible . Again not for a 42 apache but for a car I think it will work , go to site and respond

Yep. Yep. Yep
When you figure out how do do it and make it work, come back here and sell boaters one. In the mean time , excuse me but talk is cheap action and accomplishment take more!

so you think they 100 % crap ? You dont think 5 psi is possible ? I have no stake in that company but if those claims are false sounds like a lawsuit ?

Sorry, but yes they are crap. And you will probably lose HP with the restriction it will cause.

total BS
Electric Supercharger
So now we ultimately come to the discussion on the idea of an electric supercharger.

First I want to note that this article doesn't apply to the few electrically driven compressors that have been specifically engineered for the purpose of providing short-term boost over a quarter mile. The Thomas Knight products are an example. Those kits are similar to a turbo or centrifugal blower driven by a high-amperage electric motor and require heavy duty wiring and entire banks of batteries to drive them. They do not hook up to the stock 12v vehicle electrical system and are not meant for street-driven vehicles as they are only capable of producing boost for very short periods and require a long time to recharge. These kits cost thousands of dollars and if you're considering purchasing one, I'm going to assume that the scope of this article is elementary in comparison to the knowledge you must already have.

So then, back to the topic of electrical superchargers. Understanding that forcing more air into the engine will make more power, it stands to reason that if we can place an electric fan in the intake path that will force air into it, we can make more power.

The problem with this idea is that most people who think of it really have no idea how much air gets pumped by the engine during its normal operation. The engine acts as a big air pump and is capable of moving huge volumes of air all on its own. With that in mind, any electric fan that you place in the path of the intake is only going to act as an obstacle to efficient airflow and not provide any level of boost whatsoever. In order to provide boost, the fan has to be able to force more air through the intake than is already being sucked and that's simply not going to happen with some off-the-shelf computer fan or bilge exhaust blower or whatever else you've found or had marketed to you.

Well they can claim anything and not have to back it up. What did you spend on the thing? Court costs would eat you up.
People have seen 1 psi on a small motor. That equals such small hp that its wieght off sets any gains.
You gotta think about the fact that it takes a motor's load through a belt sys to get a blower to spin 2k to 3k at the pulley than internally stepped up to 10k plus. I guess what I am trying to say is that the gas engine is the power source. The size of the electric fan motor would have to be able to egual the same output and be powered itself.
At that point you would have more space wieght than just puttin on a mechanical blower.