Blending 100LL and autogas- the line is a curve! Mixing 100LL in lead free doesn't give you an average of the two fuels, you get more octane increase with the first unit and each successive unit of 100LL gives you a lower return on octane. You might very well get what you need with 10 to 20% 100LL avgas. I'd start at 33% and work my way down to 10% checking to see what changes. Look at operating temperature, if you have one of those IR thermometers I'd scan the head, exhaust manifold and muffler/stack and see.
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Today's Featured Article - A Question for Dads This recent topic from the Tractor Talk discussion board is being highlighted because it is an awesome display of the caliber of individuals that have made this site their own. The young person asking questions received positive feedback and advice from total strangers who "told it like it is" with the care many reserve for their own kids. The advice is timeless... so although it isn't necessarily antique tractor related, it will be prominently displayed in our archives to honor those who have the courage to ask and those who have the courage to respond in an honest, positive manner.
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