Home › Forum › Ask A Member › 65 Sportwin surging at high speed › Re: 65 Sportwin surging at high speed
You go down in jet size as you go up in altitude. I don’t remember how high you have to go before there is a noticeable difference, but what is dangerous is when you come back down to sea level and you are way too lean. Maybe Don remembers, but it was so many jet sizes for every 5000 ft.? Not sure about the height. Long time ago and we didn’t have any altitude in my territory with a lake!
The reason I said two jet sizes is because 1 jet size is just .001 which is not much difference in percentage of a .050 orifice. Today’s fuels are dyer with ethanol and just by the nature of how they are made (fracking). Even ethanol free fuel is not the same ole fuel we use to run.
Dan in TN