2G Methanol injection failsafe

[1stDSM]

I'm sure a bunch of you guys on here have ran meth/water injection with ecmlink, which brings me to my question. What is the best/most reliable failsafe that can be implemented into my system? AEM 30-3300 kit, not using the provided controller since it's being controlled strictly by ecmlink v3 full.

 

[danl]

Please define what you want the fail “safe” to achieve. By definition, methanol injection leans out the main fuel mixture, being fail unsafe. To make it safer, trigger ecmlink with a pressure switch right at the injection nozzle. That way, if no pressure is present, ecmlink will not reduce main fueling.

 

[1stDSM]

I guess what I'm wanting to achieve is..if the pump, relay or by chance wiring, etc would fail, I'd like to have something in place that would react quicker than I would be able to once I see the check engine light come on for knock to protect my engine. I know ecmlink isn't able to revert to another tune, so I just need to know what I need to do to make sure the my engine is safe in the event of a failure

 

[jdxnc]

Use a solenoid just before the nozzle and a pressure sensor on the meth line tied into the idle switch input, use secondary maps as the default and revert to primary when the idle switch looses signal, which are set at much safer values.

 

[DSMPT]

if the pump, relay or by chance wiring, etc would fail, I'd like to have something in place that would react quicker

How about a flow sensor? If you are thinking to add only one fail safe that can cover all the situations like you described, then a flow sensor would probably be the one you want. Make the flow sensor to control ECMLink to switch to secondary map or boost controller to reduce boost pressure, or make your own warning light/alarm sound. This should work in any case if the sensor is not seeing flow, such as when you get the tank empty, wiring issue, clogged nozzle etc etc.