jeremy_nash

If you have a fan capable of moving enough air to operate a turbo, why bother with the turbo? connect the output of fan to the throttle body, then you dont have to worry about oil plumbing for the turbo, packaging for the turbo.

Basically, it seems as though this thread is full of fail. Fail for a stupid idea and fail for intelligent people having to waste their time to tell someone of the complexities of fluid dynmics, ( air is treated and acts as a fluid) which is obviously a waste of time for someone that cant understand that if flow isn't higher than use, that no pressure will be attained.

also, not sure why I'm wasting my time typing this, so I guess I fail also

valkyie

This is pointless. If you think you need to have a restriction on the system in order for a compressor (turbo scroll ) to put out compressed air then you keep thinking that. The restriction you are reffering to only applies to maintaining the properly intake pipe diameter for optimal air flow velocity. The small cross section of the pipe allows the compressed air from the turbo scroll to flow faster. The air is already pressurized when it leaves the turbo scroll. The 15 or more psi shown on a boost guage on any youtube video is comming from the turbo scroll not from restriction. On my 300zxTT for more horsepower I don't adjust the restriction on my intake system I turn up the boost made by the turbochargers. The compressed air is comming from the turbo. The force that drives that air is comming from the turbo (centrifugal force). This thread is now closed thank you and have a nice day.

valkyie

Problem with using a fan is that the fan is not able to create a pressure build up in an engine. However a powerful fan could be used to turn the turbine of a turbo and thus the turbo is flowing pressurized air. I have been playing around with this concept and have come close to belt drive turbo speeds. Axial fans not as powerful as centrifugal blowers. I use a centrifugal blower for my experiments and have learned that the more CFM and faster I can get it into the turbine scroll the faster the impeller speed is. You will at least need 400 to 500 CFM for a 30,000 rpm. I am using a heavy 1LB turbine wheel from a ebay turbo. Now if you used a lightweight turbine wheel like in a dull ball bearing turbo you will get some good speed. I look at videos and the guy is blowing into the ball bearing turbo and it spins easily. So a powerful centrifugal blower could really make that thing spin.

The only benefit to using such a setup is that you would not need the expensive turbo plumbing saving you some money. You could have a constant run speed and a burst speed or set it up away you want. Another benefit would be the not hot exhaust causing heat soak. More horsepower from cool dense air.

valkyie

I know its been a while on the topic of electric turbos so here is something I found.

Home - B2BElectricSupercharger.com

MetricMuscle

So, what happens to this compressed air as it exits the compressor housing and heads towards the intercooler or intake? Does it decompress or how does it stay compressed?

ndavis1280

[Busa4 is correct.
QUOTE=valkyie;1308002]Yes you are right but at the same time wrong. Yes a turbo does make a slight pressure differenial when more cfm produced by the turbo exceeds the cfm requirement of an engine. That most likely happens at peak compressor speed because at low speed the turbo is not putting out enough air. But the turbo by itself alone produces pressure. Look at a turbo compressor map it proves that a turbo puts out so much pressure at a given air flow rate. A turbo draws in air and converts high speed low pressure air into low speed high pressure air. So the turbo is the main force behind making the pressure in an engine and the additional pressure that is created from the cfm build up is just a byproduct.

Maybe you are thinking about how a root supercharger works. Research the term Dynamic Compression to get a better understanding how a turbo works.[/QUOTE]