Jet Sizes For 64 T-Bird

[JohnC]

What jet sizes do 64 T-Bird's use? I am interested in what the shop manual says. I am at sea level.

[Yadkin]

For the 390, Autolite 4100 with the 1.12" venturies, I have 47F on the primaries and 57F on the secondaries. There has been discussion on if these need to be changed out using modern ethanol blend fuels.

[JohnC]

Jets

Do you happen to know what the shop manual says? I would like to know what the stock sizes are so that I have a starting point.

[Yadkin]

0-5000', primary 48F, secondary 57F. For every 5000' elevation decrease each by two number sizes.

[JohnC]

Jets

Awesome!- I just want to get a starting point and dial it in from there. Thank You.

[Yadkin]

Let me know what you hit on. I'm installing an O2 sensor in my H pipe so I can tune mine as well.