165fmm and nibbi PE28FL tuning questions.

NathanTC · 04-15-2022, 07:25 PM

air filters came in.
The one with the 45* elbow is the one i started out with. Slight bog down low, ran really good up top

Middle one with the chrome gave good off idle response and caused it to cut out badly after about 3k but then would smooth out from 4k and up. Weird

The far right, smallest cone filter. Extremely good off idle response. Every bit as impressive as fuel injection. Lowered power above 5000 rpm, causing a loss of top speed. No cutting out, surging, or bogging, just felt weak. Causing engine to cut out slightly (sounds like a misfire) just as you back off the throttle after a wide open high rpm run.

refresher
NIBBI PE28FL with 42 pilot, 115 main, 2 turns out on air screw, and needle in highest position.
Valves both set at 0.10mm
165FMM engine.

Anyone here have any ideas on which filter i should stick with, still need to correct float but im thinking small cone filter and find the jets its likes for top end.

04-15-2022, 07:25 PM	#29
NathanTC Join Date: Mar 2022 Location: Lumberton TX Posts: 36	air filters came in. The one with the 45* elbow is the one i started out with. Slight bog down low, ran really good up top Middle one with the chrome gave good off idle response and caused it to cut out badly after about 3k but then would smooth out from 4k and up. Weird The far right, smallest cone filter. Extremely good off idle response. Every bit as impressive as fuel injection. Lowered power above 5000 rpm, causing a loss of top speed. No cutting out, surging, or bogging, just felt weak. Causing engine to cut out slightly (sounds like a misfire) just as you back off the throttle after a wide open high rpm run. refresher NIBBI PE28FL with 42 pilot, 115 main, 2 turns out on air screw, and needle in highest position. Valves both set at 0.10mm 165FMM engine. Anyone here have any ideas on which filter i should stick with, still need to correct float but im thinking small cone filter and find the jets its likes for top end.
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