rotate jug on 26cc for twin exhaust setup
11-28-2015, 11:54 AM
#1
Thread Starter
rotate jug on 26cc for twin exhaust setup
Hi Guys
I have a question. if you rotate the jug on a 26cc to get both exhaust on the same side this is ok rite. sine all the porting is in the jug. using MHz drives so two leftys is what I need. Thanks Craig
I have a question. if you rotate the jug on a 26cc to get both exhaust on the same side this is ok rite. sine all the porting is in the jug. using MHz drives so two leftys is what I need. Thanks Craig
11-28-2015, 05:10 PM
#3
12-01-2015, 06:02 AM
#6
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It is a little more complicated than that.
First like was mentioned the ports will not line up and one side has to be machined to blend in the other one you kind of let the mismatch stay because the step isn't hindering flow as much as the step in the opposite direction like the one you do fix is.
Second the ignition timing is going to be off because you rotated the cylinder but left it rotating the same direction. That reverses the piston pin offset and changes the relationship of the crank to the piston being at TDC so your ignition timing is going to be off unless you degree the engine and correct the flywheel relationship to the crank or TDC .
Two strokes are designed to be run with the working side of the piston on the cool wet intake side of the cylinder but definitely not the exhaust side of any high performance engine especially. So that is screwed up.
There more but that should be enough reason to know you do not want to do that and pretty much ruin much of the design of the engine.
If your going to do it these are just a few things to know and it can never be the engine it was.
First like was mentioned the ports will not line up and one side has to be machined to blend in the other one you kind of let the mismatch stay because the step isn't hindering flow as much as the step in the opposite direction like the one you do fix is.
Second the ignition timing is going to be off because you rotated the cylinder but left it rotating the same direction. That reverses the piston pin offset and changes the relationship of the crank to the piston being at TDC so your ignition timing is going to be off unless you degree the engine and correct the flywheel relationship to the crank or TDC .
Two strokes are designed to be run with the working side of the piston on the cool wet intake side of the cylinder but definitely not the exhaust side of any high performance engine especially. So that is screwed up.
There more but that should be enough reason to know you do not want to do that and pretty much ruin much of the design of the engine.
If your going to do it these are just a few things to know and it can never be the engine it was.
