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Thread: Help with port map options
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12-28-2017, 11:28 PM #15000 RPM
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Help with port map options
Help with port map options , needing help with picking port timing changes to move rpm range up and make has much power as possible. . I've got a 1985 merc XR2 2.0 I've learned it doesn't have finger ported pistons or block.. so far I've got chest work cut , and rod slots cleaned up. Going to D port pistons also.
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12-29-2017, 12:16 AM #2Screaming And Flying!
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Take ya finger in the top of Exhaust port. Feel the sharp cut..... round rat tail till smooth.
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12-29-2017, 07:51 AM #3Screaming And Flying!
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I am not talking about the top of port for timing but the sharp edge of the bend in the port.
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12-29-2017, 08:39 AM #45000 RPM
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Thank you Dave s I'm guessing that would help flow lil bit to round that sharp corner.. I'll need to be careful on the bore not to get out there
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