| Author | Message | ||
     Bob_thompson |
Just curious, has anybody ever seen this done to spark plugs. We used to call it "clipping". It is cutting down the ground electrode to put spark out into air/fuel stream for better ignition. Also sharper edges makes for better spark "jump". And the plug doesn't need to be indexed toward intake valve with shims. Racers used to do it all the time before more exotic plugs came along. I still do it for performance engines where I can't find the correct modern plug in the heat range I need. My M2 slightly modified may or may not benefit from this procedure but its fun doing anyways and it runs exceptionally strong. Bob  | ||
| Bomber |
yessir, I used to do it for my yam650 flattracker -- worked great, but the sharp edge, which I suspect yeilded much of the good results, wore quickly, specially in that bear of a motor (very high compression, pretty poor flowbench numbers) | ||
| Henrik |
So, do you then set the gap between the sharp edge and the center electrode? Henrik | ||
| Bomber |
judicious bending, and being careful not to cut too much off | ||
| Djkaplan |
I used to do that for my old small-block Chevy that I drag raced - the hotrodders called it "side-gapping". It probably helped in the old days with weak ignition systems and poor fuel atomization. I stopped doing it when I realized it wasn't helping my ETs at all. |
