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Old 05-11-2009, 05:36 PM   #31 (permalink)
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not to dredge up an old thread, but wankel plugs are different....way diffrent...

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Old 05-12-2009, 09:02 PM   #32 (permalink)
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no worries, I love that you used an old thread instead of creating a new one.

Those are some interesting looking spark plugs. Do all Wenkel plugs look like that, or is that just one brand? Closest thing I've seen are Bosch Platinum +4s.
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Old 05-12-2009, 10:11 PM   #33 (permalink)
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the 12a had a goofy 3 prong design that was almost flush with the thread ring
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Old 05-12-2009, 10:19 PM   #34 (permalink)
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I remember those, Had to drive to three different Autozones to get the plugs for my 85 Rx-7. Gotta love those rotary engines. The reason that they are shaped that way is to allow the apex seal to pass over the end of the spark plug without hitting an electrode (in this case the four quarter circles surrounding the center) but still allow ample room to spark the mixture. There are also two different spark events per ignition sequence, called leading and trailing. They help keep the rotor moving in the right direction.
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Old 05-12-2009, 10:40 PM   #35 (permalink)
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i wonder what else they would fit...
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Old 05-12-2009, 11:36 PM   #36 (permalink)
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Quote:
Originally Posted by hansj3 View Post
i wonder what else they would fit...
It might fit other applications but chances are it would not work as well (ie be as efficient) as a plug that protruded into the CC
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Old 05-13-2009, 01:55 AM   #37 (permalink)
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To go back to the original topic, if you're having trouble positioning the plug opening, make a mark with a sharpie on the ceramic. Instant results! Hope it helps someone.
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Old 05-13-2009, 12:01 PM   #38 (permalink)
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i ended up doing mine the hard way.... when i did my head gasket i put them in before i put the head on and just jockeyed them around until i got what i wanted but i had them facing the center with maybe a bias towards the exhaust valve... big one
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Old 05-21-2009, 12:53 PM   #39 (permalink)
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I've looked at doing this over the last couple of years... one question I cant seem to find a definite answer to: On a flat faced sparkplug (the kind that has the integral washer), I saw somewhere to "remove" that washer before installing a copper "shim" one. Elsewhere I don't see a mention of removal of the integral washer...
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Old 05-21-2009, 01:38 PM   #40 (permalink)
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You're not supposed to remove that washer, it provides the positive seal for the plug. The copper washers are for indexing only.

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