Originally Posted by
redline81
Hey thank you for your insights. So sad that there are no incentives in running cleaner fuels or pollute less.
There have been a lot of discussions around in Italy for several engines running on LPG (actually has propane inside, but it's not 100% propane). When cold, engine stays on gasoline for several minutes, until LPG ECU detects sufficient engine temperature to switch fuel. That kind of trick should solve also the condansation issue with your engines. A big concern for gasoline engines when you are about to convert them on LPG is that LPG burns slower and with slight higher temperature than gasoline, therefore at high RPMs the risk is to have part of the final combustion flame touching the open exhaust valves and seats, taking them to premature wearing. In some cases people needed to rework the head after 70.000 Km or less. There's little literature about the "Bi-fuel" version on Mirage (Space Star) distributed in Italy, AFAIK is a standard 3A92 with a LPG system tuned and supplied by the well-known manufacturer BRC. Not knowing if seats and valves in my Mirage are good enough to resist 100K or more kms on LPG, the specialist suggested me to install a little additive dispenser (Flashlube), which injects into intake manifold a very small amount of catalyzer-friendly lubricant and valve protector (proportion is like 1 / 1000). This mixture will also slightly speed up LPG combustion, getting (hopefully) similar valve wearing of gasoline-only engines. I'll let you know if that was a good or bad choice
You should post some pics of your setup if you can!
It wasn't until recently I learned that some(if not all) efi dual fuel setups run on gas when cold.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)