Basically Herb's got it... apples to oranges..... and you have elevation.... I still use an old school propane and dwyer set Marty made.... for the most part, I bypass any 3rd channel needle I have, with a manual needle ( cmb factory), run the boat until I get a serious good run, and plug, and then i use my flowmeter to set the third channel at that flow setting as baseline...... rarely I ever use the flow machine again, and unless I travel to a major elevation venue do I ever have to touch the main to adjust.....
Factors like a new, tight motor, and searching pipe lengths, along with pulling too big a prop, normally have the fuel setting all over the place until you settle in or find the baseline... Once i'm comfortable with the boat running at baseline I hook up the radio 3rd, flowed, at center arm, and never look back.......
I run the manual on my tunnel exclusively..... dropping from 680 to almost sea level, at a race, I had the privilege a friend lent me use of a Mazor meter..... after open water and correspondingly setting a good needle, i flowed it for kicks......
with the numbers on my pit table, and using the machine, it was found to be very accurate, and i was duly impressed....
the number was 130..... my boat to yours, basically we cant give you a set of numbers... there was, which I have lost, a chart in the construction of a flowmeter post,( propane/dwyer) that had ranges for each size engine. In a pinch, and say, i have a 3rd channel integrated carb, did i use these range numbers. I had found, that with servo travel i could set to these ranges and would still have to dial mains in more than usual, and arrive at a base 0 on my radio, and center on the arm.....
Run the boat.... test the boat..... run it a little more.... while I havent gained a Mazor machine yet, they have their place, and until you gain your baseline on your boats, myself at least, hesitated at the unknown variables you have, and we all know throwing out a massively lean number could have damaged your engines........ my 20 cents.... and I post only because, it was the crickets chirpin sound that made me do it..... commence battle..... Mike
