Originally Posted by PH-SCP
I have the opportunity to buy a low time Lycoming IO-320-B1A engine for my RV-9. However, based in Europe I do not want to run my airplane on AvGas, it's just getting too expensive.
I am looking for advise whether or not it is possible to feed an IO-320-B1A engine with MoGas which in our part of the world has an octane number of 98 and is still available without ethanol/methanol from certain providers such as Esso.
Your 2 cents are most welcome
I grew up working alongside my IA Dad who used 100% MoGas in our family's 57' Cessna 182 for over 30 years. Never had a problem, ever.
I operated my Harmon Rocket with an IO-540 C4B5 and electronic ignition/Bendix F.I. for 5 years/700 hours primarily on 91 octane non ethanol MoGas readily available here in FL.
Here is some data and techniques/lessons learned.
My Dos Centavos...
1. I always mix Marvel Mystery Oil into the MoGas per recommendations on the container. It provides upper cylinder lubrication.
2. I never stored MoGas for later use, always recent purchases. It breaks down over time.
3. Boost Pump on below 1000' AGL period.
This includes ground operations, taxi, etc. The cold fuel circulation is key to avoiding Vapor Lock.
4. Hot starts: Boost Pump on 10 seconds prior to engaging starter. Once prop is spinning and the Electronic ignition fires, full rich. As I said above, leave BP on throughout ground ops.
5. Longer run up in summertime. It's always summer here in FL so I would perform a standard run up then a 30 second run at 1500 RPM to insure cold fuel had reached the engine.
Conclusion: MoGas can not only be safely employed in airplanes, I believe it will be the only fuel available in 10 years.
FAA MoGas Certified engine approval list: http://www.autofuelstc.com/approved_...airfames.phtml
Great article on MoGas use:http://generalaviationnews.com/2011/...0-mogas-myths/
PS:Van actually included drawings in my original RV4 plans from 1989 showing a fuel routing system for MoGas use to avoid vapor lock!
PSS:Two current fuel injection systems manufacturers willingly approve MoGas in their systems, Airflow Performance and Silverhawk(Bendix clone). The FAA STC approval list of certified engines approved to use MoGas doesn't include any "IO" engines, mainly because Bendix wouldn't approve their injections systems for MoGas. The real truth is nobody tested an IO to get enough data for the STC...