I wonder when this thing was made. I'v never heard of them, and the 8hp rating on the motor has to be a lie, would take more amps to run a true 8 electric HP than what a car would normally have run thru a circut even it it was run thru a high amp relay. http://cgi.ebay.com/ebaymotors/Supercha ... dZViewItem
more than a marine blower fan, but less than a supercharger
- Thread starter matt1967
- Start date
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Anonymous
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It is NOT a thomas knight. It is a scam. Shame on you for bringing it here! 
If it IS a real thomas knight made product, then it is one of his earlier failures. Heavy on the failure part.
There are electric superchargers out there, but they draw many more amps than a simple starter motor does because the load is much higher. They usually make boost for about 20 seconds max before needing a charge.
Most electric motors simply do not spin fast enough to run a centrifugal direct like that.
Three motorcycle batteries??? HAHAHAHAHAHAHAHA! It would make boost for .03 seconds before they are run down. The actual electric supercharger kits I have seen use a big bank of Optima batteries (4 or more)
Batteries not included...HAHAHA!
Here's the real thing:
http://www.turbomagazine.com/tech/0406t ... ercharger/
If it IS a real thomas knight made product, then it is one of his earlier failures. Heavy on the failure part.
There are electric superchargers out there, but they draw many more amps than a simple starter motor does because the load is much higher. They usually make boost for about 20 seconds max before needing a charge.
Most electric motors simply do not spin fast enough to run a centrifugal direct like that.
Three motorcycle batteries??? HAHAHAHAHAHAHAHA! It would make boost for .03 seconds before they are run down. The actual electric supercharger kits I have seen use a big bank of Optima batteries (4 or more)
Batteries not included...HAHAHA!
Here's the real thing:
http://www.turbomagazine.com/tech/0406t ... ercharger/
matt1967":1f2a9w9e said:
How quick do you want to be in the1/4?
20 sec is enough time to spool up, stage, launch and run.
It's a fairly elegant solution but way, way more complex than a turbo.
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Anonymous
Guest
The problem is boost goes down as RPM's go up because the electric motor runs at one speed.
Unless you add a frequency drive run it off the engine RPM signal. I know more than a few electrical gEEks who would look at that as an obvious answer. Actually, the system shown in the link has a BOV to control boost, so it's going to be constant until the engine RPM catches up with the blower. If the blower is sized properly, it might not be that big of an issue (other than burning up a whole lot of kW that you end up just dumping over the BOV.)
Personally, I'd go for the turbo and not have to deal with all the extra weight and complexity of the batteries, motor(s) and cables
Personally, I'd go for the turbo and not have to deal with all the extra weight and complexity of the batteries, motor(s) and cables
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Anonymous
Guest
Red Wagon":3dgmac7v said:
He did try some centrifugals but found out it was too hard to make something spin that fast (50,000+ RPM) ..... electric motors can't go that fast because centrifugal force tears them apart, and any type of gear or belt drive to increase the speed is just too inefficient.
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Anonymous
Guest
here is a good laugh. Dont know how well it would work. 600.00 gets you a WHOLE 1.7lbs of boost... WOO HOO
http://www.electricsupercharger.com/
http://www.electricsupercharger.com/
1.7 PSI is for the "Super" version; the standard only gives 1 PSI 
They provide 2 numbers 800 CFM @ 0 PSIG discharge head and 1 PSIG discharge head. At no point do they tell you what the CFM rating is at that pressure.
The Thomas Knight version is complex, heavy and expensive but at least it works. This thing should be reserved for cars with titanium lug nuts.
They provide 2 numbers 800 CFM @ 0 PSIG discharge head and 1 PSIG discharge head. At no point do they tell you what the CFM rating is at that pressure.
The Thomas Knight version is complex, heavy and expensive but at least it works. This thing should be reserved for cars with titanium lug nuts.
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Anonymous
Guest
StrangeRanger":2nu8yvyg said:
Because it is near zero.
