Nutball
Here For The Long Haul!
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- Oct 31, 2018
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I'm about to modify my 352. Any suggestions for a small engine like this? I saw a short thread about a ported 310. The engine looks the same, but this one is slightly larger. I assume both have a 38mm piston, so far I have only measured stroke on the 352 to be 30mm, so that means 38mm bore for 34cc.
I have an aftermarket 200t cylinder, if their port designs are any good I could reference from it. The ports on the 352 currently look smaller all around; mainly shorter in duration and possibly less width too. So if the 200t is good, this appears to have easy room for improvement. 1.75hp stock. I roughly figured the intake timing to be around 65-70, and the exhaust to be around 110 maybe lower.
I am going to try sanding the base down some for more compression, and sanding the bearing slots to match that change. I'll rely on a sealer to correct any flaws in my grinding of the bearing slots. It started with 140psi cold and having sat for a week. 170psi with oil.
I have an aftermarket 200t cylinder, if their port designs are any good I could reference from it. The ports on the 352 currently look smaller all around; mainly shorter in duration and possibly less width too. So if the 200t is good, this appears to have easy room for improvement. 1.75hp stock. I roughly figured the intake timing to be around 65-70, and the exhaust to be around 110 maybe lower.
I am going to try sanding the base down some for more compression, and sanding the bearing slots to match that change. I'll rely on a sealer to correct any flaws in my grinding of the bearing slots. It started with 140psi cold and having sat for a week. 170psi with oil.
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