Re: NGK sparkplug codes

Warisesi /
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the B5HS is standard length and the BP5HS is projected which means the cernal of the explosion is deeper in the combustion chamber. The heat range is the same tho. If you put a B6HS and a BP6HS wif a L86C champion in the middle then you notice the champion is actually longer then the normal ngk but shorter then the projected ngk..

when you get the right range then you can fool with projection. the actual electrode part of the spark plug tells the detail if you are exact. it is splitting hairs at that point but after a lot of long hard runs you can see the one that is still firing clean and which one is blistering a bit near the porcelin or getting soot near the porcelin.

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