Quote:
Originally Posted by AN
Ad one more to the list of members who joined in with the sole purpose of following this thread ... I am an MX-5 owner and really hope to see a DIY kit come out of this effort.
Great job neutron256 ... I hope you get back to it soon ... I had a couple of ideas / questions that I wanted to share and see if you have done some thinking / research about it ...
> For power delivery ... how about using a battery pack in conjunction with (parallel) some large caps ... This setup should be able to provide high peak current demands of any hi-power motor ..
> also, for tuning ... while closed loop would be ideal ... but given how well the Phantom solution is working with and on-off switch .. I think the three mode solutions is rather simple and elegant ...
1. TPS less than 25% off
2. TPS between 25% ~ 75% ... Ramp up the motor with the rpm
3. TPS 75% + run full speed
4. Also if the motor cut-off should be slightly before rpm redline ... to avoid surge (only in picture if we have a 7+ psi eSC.
Apologies if this these have been covered before ...
Also .. really hoping the LM5 motor/compressor setup is available soon and priced sub $1000... sounds like an ideal solution for this setup ...
Does anyone know what are the specs on the motors used in the Phantom setup ...
Thanks all.
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Thanks for the support.
I have a set of UltraCaps that I got specifically for this project and will probably try to run with the batteries at some point. First I need to get the basic setup a lot more solid.
Personally I'm not so concerned about surge at redline. The PSI falls as RPM rises so at redline PSI isn't going to be that high unless someone can build a motor/compressor that can deliver much higher pressures then Phantom is currently seeing.
Currently since I'm using the Unichip module I can easily use it to create a boost control map using TPS and RPM. It is however a very cluttered install and l'd like something cleaner. I'm considering custom designing a controller that takes the TPS signal directly from the throttle body, and the somehow reads RPM.
My thought is the simplest way to read RPM would be to just detect the signal from signal going to one of the plugs. I'd need put a little more thought into the best way to do this.
My biggest problem right now though is redesigning my compressor. It's a lot of power in a very small package. I'm thinking more and more the best way to go is some sort of transmission to use a larger slower motor to obtain the compressor speeds needed. What I really would like is an affordable centrifugal supercharger that I could drive with the electric motor.