I might be down for one.
This already exists, fyi: AEM Performance Electronics Wideband UEGO Failsafe Gauge - Wideband O2 UEGO, Water/Methanol, Stand Alone Engine Management, Piggyback F/IC, Tru Boost Controller, Gauges, Automotive Performance Electronics
and the better version exists too: J&S Vampire
Good idea, but I would look into cutting spark.
I know you say that once you feel the injectors drop out it will surprise you and I agree. but we all can agree that too much spark/detonation is an issue and if you cut fuel and something doesn't react fast enough, they are still getting spark and still seeing a lean condition and even worse with injectors being cut off.
I would see if you could cut spark instead.
Good idea, but I would look into cutting spark.
I know you say that once you feel the injectors drop out it will surprise you and I agree. but we all can agree that too much spark/detonation is an issue and if you cut fuel and something doesn't react fast enough, they are still getting spark and still seeing a lean condition and even worse with injectors being cut off.
I would see if you could cut spark instead.
You can cut spark. It's up to the end user how they'd like the safety action to be taken. I've tried spark but didn't like that I was then dumping raw fuel in the engine and when you let off the gas it's going to possible all ignite in the exhaust. My personal preference has been injector cut and its been working very well. I've purposely leaned out the tune on both vehicles and hammered them WOT multiple times with this unit with no ill effects. Like I said though you can wire either way. My opinion is once the injectors are turned off there is zero fuel.
You know I could have the system have two outputs and you could cut both spark and fuel but that seems overkill.
That was going to be my next question about cutting both. IMO, that would be good to add as an option.
I agree about the risk of backfire once timing comes back, but it's one of those things...do you cut fuel and risk detonation or do you cut spark and risk a litte backfire.
Something else....how about cutting both, but can you do it in percentages? Like fully cut spark and 50% fuel or 50% both?
Is back firing really an issue? Almost every rev limiter out there kills ignition, and when it comes back on you don't hear of people blowing up mufflers. :shrug:
It's a very easy self contained system. You hook it up to your widebands 0-5 volt output and the TPS and then for output you hook up the relay to either cut injectors or take what ever other action you like.