07-30-2017, 11:39 PM
Dean, by "flatback" you were referring to the small Mac carb (Mc9 or earlier), and not a BDC-X (Mc91 and up), correct?
The duckbill circuit started with the BDC's, I believe. I don't think the small Mac carburetors had the duckbill circuit.
If that's true, then it seems like the desired pop-off pressure should be close to the value folks use for Tillotson HL's.
The duckbill circuit started with the BDC's, I believe. I don't think the small Mac carburetors had the duckbill circuit.
If that's true, then it seems like the desired pop-off pressure should be close to the value folks use for Tillotson HL's.