Open Source Electric Supercharger

[jflogerzi]

Got to say I am looking forward to your results. If you can produce 5psi of boost and hold it till red line, that would be fantastic.

Sent from my SGH-T999 using Tapatalk

[neutron256]

Originally Posted by jflogerzi

Got to say I am looking forward to your results. If you can produce 5psi of boost and hold it till red line, that would be fantastic.

Sent from my SGH-T999 using Tapatalk

Thanks, I think 5psi at redline is being very optomistic, but I really have no idea how it will perform at this point. Hopefully I'll be able to start doing some real testing this weekend. The rest of the parts for my controller should be arriving today, and I'm working on soldering up the wiring and connectors.

[AN]

I spent some time estimating how much air the Seadoo will flow in this application. I came up with the following table.

Assumptions and calculations :

Based on what we know about the 2 different Seadoo chargers, I have estimated that the red compressor (185hp) flows 17.36 lbs/min @ 39k rpm and the black (215hp) one flows 19.99 lbs/min @ 43k rpm. If somehow we are able to spin the black compressor to about 38~40k rpm (which I understand is a tall order), we should be able to flow roughly 18 lbs/min of air. this means in a 2.0L application we should be able to generate a little over 1.2psi of boost @ 7500 rpm. At a lower rpm, more boost will be generated but the compressor will be limited by the surge line in the compressor map.

[neutron256]

Originally Posted by AN

I spent some time estimating how much air the Seadoo will flow in this application. I came up with the following table.

Assumptions and calculations :

Based on what we know about the 2 different Seadoo chargers, I have estimated that the red compressor (185hp) flows 17.36 lbs/min @ 39k rpm and the black (215hp) one flows 19.99 lbs/min @ 43k rpm. If somehow we are able to spin the black compressor to about 38~40k rpm (which I understand is a tall order), we should be able to flow roughly 18 lbs/min of air. this means in a 2.0L application we should be able to generate a little over 1.2psi of boost @ 7500 rpm. At a lower rpm, more boost will be generated but the compressor will be limited by the surge line in the compressor map.

Those numbers would seem to indicate similar performance to the Phantom setup which isn't surprising, and I'd be alright with that. I still think there are way to many variables we can't account for here so it will be interesting to see what happens.

[jflogerzi]

Originally Posted by AN

I spent some time estimating how much air the Seadoo will flow in this application. I came up with the following table.

Assumptions and calculations :

Based on what we know about the 2 different Seadoo chargers, I have estimated that the red compressor (185hp) flows 17.36 lbs/min @ 39k rpm and the black (215hp) one flows 19.99 lbs/min @ 43k rpm. If somehow we are able to spin the black compressor to about 38~40k rpm (which I understand is a tall order), we should be able to flow roughly 18 lbs/min of air. this means in a 2.0L application we should be able to generate a little over 1.2psi of boost @ 7500 rpm. At a lower rpm, more boost will be generated but the compressor will be limited by the surge line in the compressor map.

@AN interesting. Very similar to Robs current ECS which can only hold about 1-1.5 PSI of boost @ redline.

[AN]

Originally Posted by neutron256

Those numbers would seem to indicate similar performance to the Phantom setup which isn't surprising, and I'd be alright with that. I still think there are way to many variables we can't account for here so it will be interesting to see what happens.

Yep, I am really looking forward to what actually transpires ...

[jwestra]

Great project!

When looking for some information, I found that this compressor might be a better option:
20psi @ 8,500rpm
http://www.rivayamaha.com/RivaStore/...0and%20Housing

Compared to even the seadoo "XXX":
15.5psi @ 8,500rpm
http://www.rivaracing.com/RivaStore/...%20XXX-Charger

I am not sure what these RPM mean, I am guessing engine RPM

[jflogerzi]

Originally Posted by jwestra

Great project!

When looking for some information, I found that this compressor might be a better option:
20psi @ 8,500rpm
http://www.rivayamaha.com/RivaStore/...0and%20Housing

Compared to even the seadoo "XXX":
15.5psi @ 8,500rpm
http://www.rivaracing.com/RivaStore/...%20XXX-Charger

I am not sure what these RPM mean, I am guessing engine RPM

The amount power in battery you would need would be insane to hold that PSI near redline. If you are looking for that kind of power, you missing the point of this type of bolt-on.

[jwestra]

Originally Posted by jflogerzi

The amount power in battery you would need would be insane to hold that PSI near redline. If you are looking for that kind of power, you missing the point of this type of bolt-on.

I don't think we will hit anything close to those PSI's. Just a bit better than the seadoo for a decent price.

[neutron256]

I'm working on the wiring for my control system. Here are the wedges to tap into the TPS and MAP sensors.

[AN]

How did we miss these motors before :

They come in anything from 3kW to 12kW and have models that hit 50k rpm and 60k rpm.

Priced super cheap.

2 different manufacturers: TP-Power and SSS Motor.

http://tppower.com/sort.asp?class_id=4&news=44


SSS:
http://www.horracing.com/index.php?m...page=1&sort=4a

Trying to locate Manufacturers site for SSS Motors to see all the motors they make. With that RPM, we can get a smaller wheel / compressor housing.

Update: TP Power motors have reasonably good reviews .... (only read first 3 links on reviews )

[neutron256]

Originally Posted by AN

How did we miss these motors before :

They come in anything from 3kW to 12kW and have models that hit 50k rpm and 60k rpm.

Priced super cheap.

2 different manufacturers: TP-Power and SSS Motor.

http://tppower.com/sort.asp?class_id=4&news=44


SSS:
http://www.horracing.com/index.php?m...page=1&sort=4a

Trying to locate Manufacturers site for SSS Motors to see all the motors they make. With that RPM, we can get a smaller wheel / compressor housing.

Update: TP Power motors have reasonably good reviews .... (only read first 3 links on reviews )

Nice find. Keep the max voltage in mind. You'll need to have a system that operated near that max voltage to get the max speed/power out of the motor. It does look like some of them would work with a 24V or 36V system.

[neutron256]

Originally Posted by AN

How did we miss these motors before :

They come in anything from 3kW to 12kW and have models that hit 50k rpm and 60k rpm.

Priced super cheap.

2 different manufacturers: TP-Power and SSS Motor.

http://tppower.com/sort.asp?class_id=4&news=44


SSS:
http://www.horracing.com/index.php?m...page=1&sort=4a

Trying to locate Manufacturers site for SSS Motors to see all the motors they make. With that RPM, we can get a smaller wheel / compressor housing.

Update: TP Power motors have reasonably good reviews .... (only read first 3 links on reviews )

Here is the link for the TP a Power USA site.

http://www.tppowerusa.com/index.php?route=common/home

[neutron256]

Working on my control system. I tried designing my own controller with limited success. I was just having too much trouble getting the signaling right. So I'm back to using the Unichip as a controller for the compressor motor.

Every thing is wired up right, and I can hook a servo up and control it just fine, but for some reason the Turnigy Fatboy V2 ESC I'm using doesn't like the servo signal from the Unichip.

Any RC experts out there have any ideas as to what might be going on? It works just fine when I hook it up to a servo tester.