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Author Topic: spark plug 2 or 4 electrode  (Read 862 times)

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bigall

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spark plug 2 or 4 electrode
« on: 09 February 2007, 14:16:00 »
Recommended plug is Bosch FLR8LDCU or GM09 (a twin electrode.) - same plug different box
 Has anyone put Bosch FR91X or similar (four electrodes) in their 2.2  advertised on ebay.
If so any difference other than price?? ::)

Thanks
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I drive a moneypit Omega - at least its comfortable!!!!!  200k approaching rapidly!!!!!!!!! "") (must change oil soon)

Marks DTM Calib

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Re: spark plug 2 or 4 electrode
« Reply #1 on: 09 February 2007, 14:32:51 »
An intersting one.....the only real advantage you get from a 4 electrode setup on a modern ignition system is longevity....i.e. 80K service intervals .....and they have often worked loose before this time is up anyway!

I actulay see a down side of 4 elctrode versions as the spark has more shielding from the fuel/air mix and could in theory affect the speed of the flame front across the piston.......

So my opinion....not worth it!
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