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Hello
Golden lodge multi electrodes looks like the father from modern multielectrodes but have slight different work principles.
The golden lodges father was the Bosch ringspark elektrodes used from race engines.
Most high performance engines from the 60īs to 70īs had problems finding suitable full range spark plugs.
The engine designer liked to have the spark fired up as far outside the plug as possible especially when the mixture became very lean.
One fine day selecting spark plugs to index them i found out that Bosch and Champion sparks always had the same position in the same 911 head. Now testing several heads it showed up that Porsche indexed the heads to match within 45° angle.
Years later I had Bosch spark plugs wich didnīt matched.
Looked at them and found out they wherenīt made in germany.
( MAL or US ? )
Asked a Porsche mechanic about that observation and he said that Porsche had so much problems runing there 911 2,0 S engines with then aviable sparks that they used every trick and they did it before on the Carrera & race engines anyway. That was a reason why some aftermarked spark plugs didnīt worked or let the engine run uneven.
He also thought that Porsche did it only with the heads wo have a helicoil thread insert. ( Well he only worked up to that time in the factory ).
I dont think it is to hard to make indexed threads on a good ( german made ) tool machine. The quest is who ever payed to that little things attention and could manage to have supplieres joining in.
Donīt think big companys like Ford or GM even where thinking about that as it would add to much costs.
Grüsse
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