DragBikeMike
Serious Thumper
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SuzukiSavage.com Rocks!
Posts: 4391
Honolulu
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Oh boy Michael I can dig those heads. Look at the size of those valves. I bet they are at least 38mm. And look at the angle of that intake. That sucker is steep. About as straight a shot as you can get. What is the HP and redline on that badboy.
Dave, I pondered eliminating that bridge between the valves when I was trying to find more combustion chamber volume. I was reluctant. When you start staring at the thing, it just sort of yells at you "Don't do it". Don't know why, can't justify my reluctance, no sound technical basis for the aversion, but it's one of those things that sort of looks like you will regret. It just looks like it needs to be there. It does add additional quench surface.
Zevenenergie, I am confused a bit. Please help me understand what you are trying to share. I want to be sure I understand exactly what you suggest.
First, I believe you are telling me that I should tighten up my quench. Yes, or no?
Second, it sounds to me like you suggest I either leave the CR where it was, or even increase the CR. Yes or no?
Third, I think you are suggesting that my problem lies solely in the carburetion. Yes, or no?
If I understand correctly, you think that the sand blasting has nothing to do with detonation. Yes, or no?
I can see how the sand blasted appearance could be the result of some sort of liquid blasting. All sorts of stuff is going on in that crevice, and my cheap knock-off carb certainly could stand some improvement. It wouldn't surprise me if the fuel droplets are waaaay too big for satisfactory performance in a four-stroke engine. But any sort of blasting will require a motive force, like an explosion of some sort. What is that motive force? What propels the blast media?
How does this trapped fuel deform my ring land? Why is my ring land deformed? Why did the ring land pinch the second ring? Wouldn't that also require tremendous force, like an explosion, like detonation? Are you suggesting hydraulic lock?
I agree that the carburetion is less than ideal, and I agree that the carburetion could be contributing to this problem, but I am reluctant to say that detonation is not in play. All that blasting and deformation requires a motive force. I don't think fuel condensing and flashing off provides enough energy to deform the ring land, and corrosion certainly won't deform the ring land. The deformation of the ring land requires BIG TIME FORCE. Extreme pressure all at once; a hammer. Detonation.
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