Fifth injector control for Methanol injection

Discussion and support for MoTeC's earlier generation ECUs

Fifth injector control for Methanol injection

Postby Flow on Mon Sep 02, 2019 6:41 am

Hi folks,

What is the best way to control a fifth injector south of the intercooler for a mapped methanol injection system with fuel return and divided fuel tank. Is this possible with an M4? Also what should I use for a fail safe system when the Methanol tank sensor triggers a low level signal?
Flow
 
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Re: Fifth injector control for Methanol injection

Postby AdamW on Mon Sep 02, 2019 6:45 pm

Unfortunately, there is no good way to achieve this with a M4. Assuming you have the advanced options enabled then the closest you could do will be with an "Aux table". But it will be at a fixed frequency and will have no fail-safes and no injection functionality such as minimum pulse width lockouts etc so it will be very crude.
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Re: Fifth injector control for Methanol injection

Postby Flow on Mon Sep 02, 2019 7:50 pm

Thanks AW, is it possible to do boost (trim) via external input say with the aux voltage trim from the tank sender unit for the fail safe so that when the tank hits a certain level the boost is trimmed back to MAP levels the methanol / fuel pull / ignition add are not triggered at? And then as you say do RPM vs MAP Aux table with fixed frequency for the methanol injector? So run a ~500cc EV14 at 100hz with a 1ms - 8ms pulse width for a 45HP uplift?
Flow
 
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Re: Fifth injector control for Methanol injection

Postby Flow on Wed Sep 04, 2019 8:01 pm

Anyone able to sanity check this at all?
Flow
 
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