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You think by using modern ignition systems you can use MOGAS on an IO-390 without engine modifications and without losing lots of power or lifetime? |
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Have a look at this
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Here is an STC'd $12,000 water injection system for IO 520 Continentals If you watch the first 2 minutes you will see the MP and CHT values the system starts flowing at. Mostly at take off power settings with MOGAS A slightly different tool to address pre ignition / detonation that lets you maintain high MP and normal advance for rated HP output. |
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2 - road fuels in the US are rated in AKI not RON. AKI is (RON+MON)/2. You'll see that formula shown on pumps |
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In any case, under 9 to 1 Lycomings can safely use 91 AKI with proper timing adjustments and care with AFRs. Under 7.5 CRs ones can run on 87 AKI with the same care. The Swift UL avgas is higher octane and certainly suitable as well. The "universal" UL avgas, when it's introduced, is likely to be similar in octane rating to the current 100LL so as not to have to derate the current turbocharged engines too far, if at all. |
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Has anyone tried to use in-tank pumps with EFI? You'd nearly eliminate the vapor lock issues (pretty hard to vapor lock at 2-3 bar), extend pump life, and have automatic redundancy. |
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We strongly recommend that people use what's been proven over a half million flight hours with regards to the EFI fuel system if you don't want surprises or to be on a test program to validate a new design. |
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