Demons I have run rich on the idle circuit (idle - approx 2500 rpm) After 2500 the Primary Jet comes in. I always go smaller on the IFR to lean the idle circuit, smaller PMJ to lean highway cruise, and bigger on the PVCR to richen WOT when the PV is open up front.
OK, tnx, good info. My son and I are going to be working on his 670 Avenger for fuel mileage and the data points are good. That is, after we try my old 6619 to see how it fares on his engine for mileage.
