Open Source Electric Supercharger

[AN]

Thanks Neutron ... will keep that in mind.

My main reason for not going with Phantom is that I will gladly pay a little more for a little more juice up top. And, I really do want a smarter Supercharger engagement setup rather than an on/off button by the pedal.

My total (imaginary) so far is :

Hobby Motor ~$200
Batteries ~ AGM ~$200 or LiFeSO4 ~$500
Seadoo Complressor ~$250 ~$300
Hobby ESC ~$250
Charger $200
Some form of Speedcontrol input $200 ( I plan or starting simple , may be just use the 5v from the TPS to feed the motor controller .
Misc hardware and wiring $200

Total = $1500 to $1850
This should give a Superior systems (at least on paper) to the Phantom setup. If the Hobby motors delivers 35K rpm and SeaDoo delivers enough CFMs at that speed , I do not see any other gaping holes in this solution.

[neutron256]

Originally Posted by AN

Thanks Neutron ... will keep that in mind.

My main reason for not going with Phantom is that I will gladly pay a little more for a little more juice up top. And, I really do want a smarter Supercharger engagement setup rather than an on/off button by the pedal.

My total (imaginary) so far is :

Hobby Motor ~$200
Batteries ~ AGM ~$200 or LiFeSO4 ~$500
Seadoo Complressor ~$250 ~$300
Hobby ESC ~$250
Charger $200
Some form of Speedcontrol input $200
Misc hardware and wiring $200

Total = $1500 to $1850
This should give a Superior systems (at least on paper) to the Phantom setup. If the Hobby motors delivers 35K rpm and SeaDoo delivers enough CFMs at that speed , I do not see any other gaping holes in this solution.

I'm not so sure about being a superior system but I think it will be solid and easy to build, and easy to adapt. My biggest concern is if the SeaDoo wheel will be too massive and result in the motor cogging on startup. There are ways to deal with that though, and once it's spinning I think it should have no trouble providing decent CFMs.

[AN]

Originally Posted by neutron256

My biggest concern is if the SeaDoo wheel will be too massive and result in the motor cogging on startup. There are ways to deal with that though, and once it's spinning I think it should have no trouble providing decent CFMs.

Dont you think that even when not powered, the wheel will spin somewhat due to the engine airflow ... even at low rpm ... Anyhow, I guess we will find out.

[neutron256]

Originally Posted by AN

Dont you think that even when not powered, the wheel will spin somewhat due to the engine airflow ... even at low rpm ... Anyhow, I guess we will find out.

Actually no, on the KDE motor the hold between the poles is very strong which is a good indication of just how powerful it is, but it will absolutely not be free wheeling when off. The airflow should still give it a little bit of a suck starting style boost though in getting it moving when the motor does turn on though.

[neutron256]

More progress...

I got the rest of my intake parts for fitting the compressor in the BRZ. It's a close fit, but a good solid clean fit. I'm pretty happy with it.

Next step will be bench testing the compressor. I think I'll have the rest of the parts for that tomorrow.

Edit: I'm going to have to hack up my Grimmspeed pully cover if I want to keep using it. I'm a little disappointed by that but oh well.

[neutron256]

Okay so I couldn't resist, I had to do a quick test setup to see how my new compressor does. Spins up great, no cogging seems like it will move ton of air. I can't wait to start doing some real testing.

My reaction....
[ame]http://youtu.be/6AOceel95K8[/ame]

And a quick video of the test (sound from my iPhone doesn't do it justice)
[ame]http://youtu.be/luYAOVOXc7M[/ame]

[Luckrider]

I want to see if with the cover on!

[neutron256]

Originally Posted by Luckrider

I want to see if with the cover on!

That's coming but the cover is sealed with RVT gasket so I want to do any tweeting and testing with the cover off first before I seal it up.

I think it's going to be impressive though.

[AN]

Sweet ...
Was that 100% power ? any idea what kind of rpms you managed ?

lso, where do you source the silicone couplers / hoses ?

[neutron256]

Originally Posted by AN

Sweet ...
Was that 100% power ? any idea what kind of rpms you managed ?

lso, where do you source the silicone couplers / hoses ?

It wasn't 100% I need to go throughout all the controller's settings but I know it was setup for 36V not the 24V I was running it so it's less then optimal performance. I don't have any way of telling RPMs, my clamp meter will be getting here tomorrow so I will be able to measure how much current it's drawing to get an idea of total power output.

http://www.siliconeintakes.com

Is a good source for intake parts. But eBay can be a lot cheaper for parts that are easily good enough quality for this.

For the BRZ I used a 45 degree bending reducer 3" to 2.5" and a 2.75" x 2.75" x 1" 'T'. Both cut down to fit the lengths needed.

[SloS14]

[neutron256]

My finished battery/charger setup. Including a pic next to the BRZ stock battery for comparison.

[dtek]

Looks awesome Neutron, I am curious: can a motor like this be controlled in a variable & linear way fairly easily? As opposed to the Phantom on/off switch, can this be ramped up progressively - maybe based on throttle position sensor input?
Can't wait to see what kind of psi this compressor/motor combo outputs...

[neutron256]

Originally Posted by dtek

Looks awesome Neutron, I am curious: can a motor like this be controlled in a variable & linear way fairly easily? As opposed to the Phantom on/off switch, can this be ramped up progressively - maybe based on throttle position sensor input?
Can't wait to see what kind of psi this compressor/motor combo outputs...

That's a big goal for most of us working on this. I'm using RC model speed controllers which use servo input signals. The signals themselves can be easily generated by microcontrollers like the Arduino.

I'm going to be taping into the throttle position sensor, and using the MAP sensor as feedback for closed loop control of the motor speeds.

In addition a lot of the speed controllers have features like soft start and breaking modes which allows even better control.