Well the stroked crankshaft is now history after another chat with Mike. Unless I can find a builder to help me figure out the piston issue.
While talking with Mike he mentioned Crank Works Inc. did the original modifications for his kit. So I talked to him and asked a bit more about the process. CWI will build be a longer rod. They will relocate the crankshaft pin. But ... they didnít provide any info on the piston and my research - talk with Mike confirmed it - that to build a stroker requires a piston with the wrist pin located more toward the piston face. I donít have one. Mike has a couple of beta pistons but those are for his future projects and I couldnít buy one. So I need a builder that can help me with that part or just pass on it.
With my current time line - start disassembly ASAP or at a minimum by Thanksgiving and ship out the parts for the machine work and pray I get it all back for a Christmas reassembly - thatís a problem. Itís $425 just to true & balance the crankshaft. Plus another two to three hundred in tools for the job. And I forgot new seals. Not sure how much it would cost for all of them, but figure another one to two hundred. So unless I can get some quick results Iíll save the $700-$900 and see how much less the vibration is with just the 719cc BBK.
Iím still going with the fully ported head by RaceTech. With 1mm oversize Schnitz Racing SS valves, new valve guides, WebCams 163 grind cams and high performance valve springs, the total is somewhere close to $1500. The head should flow much better than stock. RaceTech will provide flow bench results of the before and after results and Iíll post those when I get them.
In any case, more flow equals more power along the entire powerband. Iíll need a way to provide more fuel/air at the right ratio to realize that power. Flow in also requires flow our. So Iíll need improved header & muffler too. If I can get it all right, then the engine should be pushing close to 60 hp. Iím not the first to do this, so know it can be done. Iím just trying to do it with more off the shelf parts.
FWIW, if after I get this all together and still need to lower the vibrations more, Iíll still pull the bottom end and send it out for balancing with the 718cc piston. I know itíll never be vibration free. Thatís impossible with a single cylinder engine, but balancing the assembly can minimize the vibrations.
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