I never seen this before?
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: I never seen this before? (Mr. Magoo)
The one for a BMW and a Ford F-150 have 2 bids each! Somebody is taking a ride.
Just for grins I sent an e-mail asking the pressure that the CFM is rated. No answer, yet... huh :rolleyes:
Just for grins I sent an e-mail asking the pressure that the CFM is rated. No answer, yet... huh :rolleyes:
Burning Brakes
Joined: Jul 2002
Posts: 871
Likes: 0
From: Costa Mesa CA
Re: I never seen this before? (Mr. Magoo)
Yeah, this is bunk.
I do believe it is possible to force-feed a Chevy V8 electrically (a project I'm going to do if I ever get the $$$) but it takes the power of a 3HP r/c boat motor and specially built compressor. The 150cfm is the give-away on this rip.
I do believe it is possible to force-feed a Chevy V8 electrically (a project I'm going to do if I ever get the $$$) but it takes the power of a 3HP r/c boat motor and specially built compressor. The 150cfm is the give-away on this rip.
Burning Brakes
Joined: Aug 2001
Posts: 1,196
Likes: 0
Re: I never seen this before? (Mark85Vett)
I saw that about a year ago on some guys FIREHAWK!!!! He had two on thier with some screwed up ducting work. He claimed it was alot faster....the guys on LS1 tech disagreed :lol: :crazy: :bs
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Re: I never seen this before? (Mr. Magoo)
You can use these on your exhaust also. To blow the BS out of your engine.
I'm ordering FOUR of them for my Vette.
Lessee 150 x 4 = 600cfm. That sounds about right.
Man!! I can't wait. :hurray: :hurray: :lolg: :lolg:
I'm ordering FOUR of them for my Vette.
Lessee 150 x 4 = 600cfm. That sounds about right.
Man!! I can't wait. :hurray: :hurray: :lolg: :lolg:
Le Mans Master
Joined: Jul 2001
Posts: 5,297
Likes: 0
From: Stamford VT
Re: I never seen this before? (VetNutJim)
Ok, we all know now that these are junk, but let's look at it one more way.
Let's compare it to a typical belt driven centrifugal blower. How does it work? A belt coming off your crank turns the supercharger. Since this puts a strain on your crank, it takes power to make power.
Now let's assume for some reason that this electric POS was able to produce similar boost amounts as a mechanical unit (which we already know is false). Since we're still bound by the laws of physics, the power to turn that supercharger has to come from somewhere. It comes from the DC motor. Electric energy is converted into mechanical energy. Of course that's not 100% efficient... closer to around 50% with a DC motor, so half of the electricity is wasted in the form of heat and noise. Well... where does that electricity come from? The alternator. You know how that's made? The same crank that could have just turned the supercharger directly instead turns the alternator. Converting mechanical energy to electrical energy is just as inefficient as the other way around, say around 50%.
So you start with crank energy, and then convert it to electrical energy through the alternator which is only 50% efficient (it's actually lower, but this makes the math easy). You send the electricity to the electric motor, which turns it back to mechanical energy at a 50% efficiency rating. So, you're down to 25% efficiency to get to the same point that a belt, which is probably around 90% or 95% efficient could get you.
Let's compare it to a typical belt driven centrifugal blower. How does it work? A belt coming off your crank turns the supercharger. Since this puts a strain on your crank, it takes power to make power.
Now let's assume for some reason that this electric POS was able to produce similar boost amounts as a mechanical unit (which we already know is false). Since we're still bound by the laws of physics, the power to turn that supercharger has to come from somewhere. It comes from the DC motor. Electric energy is converted into mechanical energy. Of course that's not 100% efficient... closer to around 50% with a DC motor, so half of the electricity is wasted in the form of heat and noise. Well... where does that electricity come from? The alternator. You know how that's made? The same crank that could have just turned the supercharger directly instead turns the alternator. Converting mechanical energy to electrical energy is just as inefficient as the other way around, say around 50%.
So you start with crank energy, and then convert it to electrical energy through the alternator which is only 50% efficient (it's actually lower, but this makes the math easy). You send the electricity to the electric motor, which turns it back to mechanical energy at a 50% efficiency rating. So, you're down to 25% efficiency to get to the same point that a belt, which is probably around 90% or 95% efficient could get you.
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Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
Re: I never seen this before? (Jim85IROC)