[quote]ORIGINAL: XJet
ORIGINAL: Wayne Miller
This means that a pressure nipple placed at the point of highest gas velocity will produce *very* poor results and may actually end up sucking as much (if not more) than it blows.
The *best* place for a pressure nipple is at the point in the muffler where the gasses are travelling at the lowest velocity (and therfore the pressure is highest). This is typically (although not always) at the point where the nuffer is widest.
On the GMS engines with a large-bore carb, the best source of pressure is the crankcase, not the muffler. My GMS76 crankcase puts out more pressure than the YS pressurized fuel systems. So the engine never quits by running lean after it warms up.