My back ground is electrical engineering but I have always like to work on cars! I was wondering why an electronic turbo charger has never been developed? I mean if I a compressor connected to a servo motor which will increase speed based on engine rpm wouldn't this setup work? You could change the compressor speed electronically and increase it or decrease it for any rpm range. You create unlimited profiles and with a boost feedback sensor you could increase or decrease the amount of boost based on the rotation of the servo. It could be mounted anywhere with far less modifications! I'd love to here what people think of this. I might even be willing to try it out if there is interest.
My back ground is electrical engineering but I have always like to work on cars! I was wondering why an electronic turbo charger has never been developed? I mean if I a compressor connected to a servo motor which will increase speed based on engine rpm wouldn't this setup work? You could change the compressor speed electronically and increase it or decrease it for any rpm range. You create unlimited profiles and with a boost feedback sensor you could increase or decrease the amount of boost based on the rotation of the servo. It could be mounted anywhere with far less modifications! I'd love to here what people think of this. I might even be willing to try it out if there is interest.
ok.. make one and let us know how it goes. Sounds feasilbe.
find me a alternator that can power this so called supercharger. 100HP electric motor isnt small... and isnt cheap... and takes alot of amps.
My thoughts exactly.
It would take quite a bit of electrical power to make the kind of power the regular old exhaust driven turbochargers make effortlessly and every time they are loaded.
I am an electrical engineer also, and you guys are right on the money. An electric driven supercharger that would move enough air to make any kind of boost would require much more electric power and weigh much more than it is worth. It is much more efficient to either drive off the exhaust with a turbo which is virtually "free", or just drive off the engine itself with a supercharger rather than add a heavy electric motor and the required huge alternator or batteries to power it.
The picture on top of their home page shows driver Mark Kibort driving his e-RAMmed 928 in the WCGT at Laguna Seca. I think the pic is Mark being lapped on lap 2.
Last edited by kjslider : January 5th, 2008 at 02:06 PM.
Garrett e-turbo....google it. There is another company that makes very powerful electric driven twin screws. In almost video game fashion you charge up for a couple minutes and then can boost for some short amount of time.
Thomas Knight makes one of the very few feasible setups since it drives a real turbo compressor. I've seen this on a few cars. Yes, requires about 25,000 or so watts to operate at full boost for the largest 1000cfm unit. 6 or 7 lightweight 12volt-~300amp batteries and a golf cart controller works pretty well to control ramp-up rate, and speed of the electric motor.
V = 13.5V 100%
E = Electric motor efficiency 100% for simplicity
I = Current need to supply the electric motor
P = Power in watts. All you need to finish the calculation is the power needed to turn the compressor at a given pressure. I am guessing but I think a Paxton uses 100 hp?
1 watt = 0.00134102209 hp, or 550 foot-pounds per second
74600 Watts = 100 HP
74600 = 13.5 * I * 100%
I = 5525.92 Amps
A side note: The alternator could be much smaller than you think, because it can build energy 100% of the time and the engine does not always need boost.
In the end, It would not work very well because of the power needed to turn the electric motor with the compressor under pressure, and the losses due to efficiency.
A few years back there was a video going around of a guy that put 2 leaf blowers (yes, leaf blowers) on an LT1 (if i remember right).
Pretty ridiculous if you ask me and far too much to go wrong when the boost stops all of a sudden on a run. Especially if you happened to be spraying. lol. That of course is after all the BS modification to get it to turn anyway.
Linear Mode
