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Old 09-15-2010, 07:32 PM   #34 (permalink)
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Join Date: Jul 2010
Location: Melbourne, Australia
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bugler - '91 Mazda 626
90 day: 35.89 mpg (US)
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Euromodder thanks, good to know there are some 2 cylinder parallel twin out there that are smooth enough for production.
These are both on bikes though so i assume the RPM is higher at idle from a quick search about 1300 rpm so that might help reduce the vibration. Maybe if i go to 2 cylinder i do need to up the idle RPM so the engine doesn't shake itself apart and if i remove 2 cylinders and all their losses and increase the RPM by less than double i will have a fuel saving anyway.

Olympiadis thanks for all the good suggestions, given me a few ideas for when/if i try this out. I am hoping i dont have to change the ECU or get a custom one but will see how i go.
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