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Old 06-20-2010 | 12:59 PM
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Lnewqban
 
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Default RE: engine puffs in air...


ORIGINAL: Switch_639


ORIGINAL: LNEWQBAN


ORIGINAL: Switch_639

.............a declined pass at WOT the engine starts puffing little bits of smoke out the exhaust
[sm=confused.gif][sm=confused.gif][sm=confused.gif]

^^^ my question also... I am doing a wide open throttle pass at full revs basically... the engine then starts puffing smoke... not leaving trails anymore...
It sounds to me like a plug that fails glowing properly at high rpm's and max chamber pressure.
As I understand, you dive at high speed and then go horizontal for the pass; when exactly the puffing starts?
Does it look like a four stroke operation when that happens, like missing one explosion each two strokes of the piston?