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Old 08-12-2010, 09:06 AM   #149
Ol' Ron
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Join Date: May 2010
Location: Chester Vt
Posts: 8,842
Default Re: Boring a flathead

Thanks Virgil and tom for your pictures. I've never seen this much detail of the castings. In my book I moved the end exhaust to eliminate the exit bend, and was disappointed in the results. Some builders have suggested that because the exhaust is expelled under pressure the flow bench isn't the right tool to measure the difference. I will find some pictures of the ports I use in my street engines not sure how well they work either. The older I get the less I know.
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