Hello Parmas,
I already did so I believe.
Fueling is controlled by the ECU running closed loop at all times employing a AFR target table.. Shall the methanol supply be reduced or seize, the ECU can add up to 30% of fuel to maintain that target AFR. I could adjust the regulation range even further.
The above safety feature shall only work if you inject a small amount of methanol circa 15%. If you normally see 11Afr with meth and suddenly dropped to 13Afr, the ecu could adjust fuelling back to 11Afr but still ignition timing is according water/meth. Knock should still happen although it's more safe than nothing
The knock controller is a J&S Safeguard vampire unit. It works by being able to retard ignition by up to 20 deg (currently set to 10 max) within one single revolution for individual cylinders depending on knock intensity. It then reapplies fully advance by bringing back 1 (for 10 deg max range) or 2 deg (for 20 deg max retard range) every couple of revolutions.
It uses a standard BOSCH knock sensor. I have mounted their gauge, too so I can see what is happening.
It sometimes misses light knock, but the mid and heavy stuff is reliably regulated.
If you get a heavy misfire, e.g. Due to water meth failing or fuel air lock, it retards by 10 deg within a single revolution. This drops all power, but with it also all force. Light knock at part throttle you can barely feel. It typically pulls 2-4 deg.
I have tried the bigger range of 20 deg retatrd, but this essentially feels like someone pulled the plug out of your ignition coil. I believe this is more useful for NA two valve engines with old and slow combustion chamber designs that need up to 40 deg of advance at WOT to make power.
http://www.jandssafeguard.com
Thanks for the link. The system looks promising especially because of using stock knock sensor, features, fine-tuning and realtime-gauge.
The problem is I don't like external controllers apart ecu to manage the ignition system. I like better to let the ecu be the manager like changing map or reduce timing accordingly. Also the system mentions that retard timing by increasing dwell on coils which is not a good idea (depending how much dwell it actually increases). Coils could overheat that way.
Also how do the system understand that knocking happens on cylinder 1 and not cylinder 4 if only one middle knock sensor is used ?
Then last but not least, I have mounted a pressure sensor in my water / methanol fuel rail. If the pressure drops in there, e.g. Due to pump failure or running out of fluid, it triggers a map switch. This is a ECU feature of my Emerald K3 ECU. It switches to a map I have set-up to run richer and with less ignition advance at WOT, so it runs without water / meth, albeit with less power. I do not have any boost control. If you have boost control, most turbo cars have, you can also just reduce boost and run with petrol alone.
Good feature. What pressure sensor did you used and how did you set it from the software ?