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Old 06-13-2015, 05:32 PM   #5 (permalink)
Daox's Avatar
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,033

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
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Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
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Dual spark plugs will help.

As for increasing swirl, I'm not sure there is too much you can do. I assume your engine only has 2 valves per cylinder. I believe what Honda did on their lean burn engines was close one intake valve before the other, thus making the intake charge swirl a bit more in the cylinder. Really, all you really want is an evenly mixed charge in the combustion chamber. You don't want any areas where the fuel is not dense enough to burn properly.
Current project: Adding regenerative braking to the Mirage
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