Recent content by matnrach

Dont forget that you will need a bypass at high RPM otherwise you will loose power over N/A due to the pressure drop through the compressor at high air mass flowrate

Perfect then. Good luck with your build. Please do a separate build thread for this.

With 5kw I think you will produce about 2 to 2.5 lbs of boost at 3000rpm. Proportionally more or less depending on engine speed

Are you sure 5kw is enough power to supply the mass flow and pressure of air you require?

The motor on that is only 5kW so you would need at least 2 of them, probably 3 to achieve the desired results. Also I am dubious that that system would be capable of running flat out for minutes at a time reliably

If you make a T section upstream of the valve then normal operation it is open and the air will pull from atmosphere and through the stationary supercharger. When you want boost, shut the valve and the ait will only be drawn through the supercharger

Not sure if that ESC could handle 300A for 5min you would have to look at the spec Bypass is not too difficult but does require some engineering and a control system. I made one on my twincharged application (have a look on this forum) You need to look at the compressor map of whatever you want...

A very rough calculation is 1.5kw per L displacement per 1000rpm for 0,5bar boost, In you case that would equate to about 13kw @ 3000rpm for 0.25bar boost (3.6lbs). That will require 270A so I would say that is possible if you find the right supercharger with the right cables and battery...

My twincharged engine can produce 1.7bar abs pressure at 1500rpm or (or less if necessary) and although does obviously produce significantly higher cylinder pressures than naturally aspirated, it is mapped accordingly and hence the ignition timing is retarded and the lambda is set run...

This is how you learn unfortunately. It can be painful at times but it is worth it. This will be the same when writing code!

yes

It is 1mm. The force is proportional to the amount of interference. If the diametral interference is 10microns or less you should be fine

I think you may need to make a new end cap in this instance, otherwise you would probably have to line bore the motor housing and backplate whereas you could make the bearing bore concentric with the spigot diameter on the new end cap

1. Correct 2. End cap is original 3. Bearing is same o/d and width just larger I/d to match the larger o/d of the extension shaft

The brass bushings are to control the end float. When I cut the rotor down I had to make a new one to get the correct end float. Also I deliberately put a very small flat on the end of the shaft to allow the air out as the extension shaft was shrunk on.