Reply to "Twin plug"

DannyP

Stan, agreed on every point, except the wasted spark/COP will best a single coil for FAT spark, especially near redline.

My ultimate (possible for me) aircooled engine would be twin plug, EFI, with coil-near-plug sequential injection AND ignition, and be 2276cc(82 x 94) with Nickies or JPM cylinders and JE forged pistons at 11:1, with an 86B and 1.5 rockers. Still NA, no turbo. And of course valve seals, piston squirters, and dry sump, natch, because @Stan Galat. Pretty much what I have with 4mm more stroke and more compression and MORE...

With respect to sequential, it requires a cam position sensor. If building from scratch with a new case, It has to be possible to put a wheel/sensor on the cam gear.

With a little time and patience for setup, I'm sure I could build a STRONG jig of steel that would enable positioning a head for that second plug drilling/milling/tapping. Simply clamp the head and clamp the jig to the mill table.

10/31/2010:22 AM

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