cpayne(at)joimail.com
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 Posted: Fri Nov 30, 2007 4:05 am Post subject: M-14P Carb Enrichment |
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Many folks have done the accelerator jet plug mod because of the sudden flooding and subsequent surge of power when cramming on the throttle at low RPM. The go-around is the classic example, or trying to hold the inside wing position in a turn at slow speed.
My experience is that while that mod fixes the low end "problem" it also removes the "enrichment" feature which is the engagement of the accelerator circuit at WFO. Using excess fuel to cool the cylinder heads at full power is a common engineering solution. Thus when the mod is in place, the engine loses a bit of power at full throttle. This effect is better seen at low density altitudes.
A better solution (for me) was to move to a .9mm accelerator jet, which is the smallest size I could find, This minimized the low RPM lag-surge but still allowed the circuit to operate with the levers forward. Of course, the rest of the carb settings need to be in the ballpark as well. Remember the Sukhoi A-B method? Take A lever and push it full forward, then push the other lever up and let it Be :>)
Craig Payne
cpayne(at)joimail.com (cpayne(at)joimail.com)
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