Quoting Removed, click Modern View to seeHmm, something sounds funny here. I would ask a few questions here. White smoke and two cylinders generally means you've blown a head gasket. Common reasons why you have blown a head gasket are improperly torqued head bolts, stretched head bolts, too thin of a head deck, too thin of a block deck, warped deck, warped head, or just a plain poor head gasket.
Here are my thoughts. Is the wastegate tuned to a reasonable boost level or working at all? Is there a boost gauge or EGT gauge on this thing? Too much boost/and a malfunctioning wastegate will overboost the motor and cause bad things to happen. I'm not a fan of a non intercooled motor, and it appears that kit has no intercooler which can compound an already dicey situation if the tune isn't right. With no intercooler thats alot of heat to put back into a motor that was never designed for boost. Incorrect ignition timing might be causing the issue. Generally if the timing is too far advanced you would burn an electrode off a plug, burn a hole in a piston, or take the head gasket out. Roll the dice on how lucky you feel with that one. Also too lean of a fuel mixture do the same thing.
Something in the tune on the engine is way way off if it's blowing up like that. Being it is doing it from what I understand under a relatively light load it almost makes me think you have a wastegate issue where it's building too much boost compared to the fuel the engine is taking in. It's hard to tell without looking at it myself, but that's where I would start looking.
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Today's Featured Article - Tractor Profile: Earthmaster - by Staff. This tractor, manufactured by the Earthmaster Farm Equipment company in Burbank, California was made for only two years. The Model C came out in 1948 and was followed by the "CN" (narrow-width model), "CNH (narrow-width high-crop model), "CH" (high-crop), "D" and the "DH" (high-crop) in 1949. The main difference between the models was tire size, tractor width and cultivating height. The "D" series were about 20 inches wider overall than the
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