If the needle in the needle and seat assembly is worn to the point where you would be fouling plugs on gasoline; it may be just right for E-10. LOL
The following are our recommendations for street use of modern fuels with and without ethanol:
Modern fuel/no ethanol - lower float levels 1/32 from specification
Modern fuel/ethanol E-10 -lower float levels 1/32 from specification,
increase main metering circuits fuel flow by 5 percent.
Modern fuel/ethanol E-15 - lower float levels 1/32 from
specification, increase idle jet flow by 5 percent, increase main
metering circuit flow by 10 percent.
Modern fuel/ethanol E-85 - nope, not going there at all, good luck to
any that try it!
If the customer resides at a higher altitude than 4000 feet, then a
different calibration is used.
If the customer tours with the vehicle, and passes through different
major altitude variance; we suggest the use of the Carter AFB, and
cut custom metering rods for different altitudes.
Typically "standard" calibration is used for sea level to 4000 feet;
1 size lean from 4000 to 6000 feet, 2 sizes lean from 6000 to 7000
feet, and three sizes lean from 7000 to 8000 feet.
Jon.
