DragBikeMike
Serious Thumper
Offline
SuzukiSavage.com Rocks!
Posts: 4284
Honolulu
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My engine is a little different from some of the hotrods other forum members have built. I raised my compression by machining about .130” off the top of my cylinder instead of installing a pop-top piston (Wiseco). I used the stock flat-top cast piston and machined four valve reliefs in the piston. My intent was to provide a good tight quench area between the cylinder head and the piston. It worked too good. It had whopper compression and the cranking pressure was too high (245 psi). I was able to mitigate that problem by installing a Web 340b grind cam, retarded 5°. It seemed to be working fine on pump gasoline (92 octane E10). I put several thousand miles on it that included hundreds of full-power pulls and some dyno pulls. All sorts of torture.
There were tests on the camshafts, tests on the breather system, tests on air filters, tests on carburetors. All the tests involved full power ops to the max. It was spending way too much time at engine speeds well above what any normal person would consider reasonable.
In the middle of all that testing, I sucked in a cylinder base gasket, so I had to tear it down. At that time, the piston assembly looked great. Not a hint of trouble.
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