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Old 09-12-2006, 09:38 PM   #1
Darrel
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Default Spark Plugs

Well I got arround to changing the plugs out on my car but i didn't go with the NGK TR55'* that are popular here. I tried something differen't that my dad read in a chevy performance book. they take regular cheap sparkpulgs (I used the OEM AC Delco plugs) and file back the ground electrode. they file it back to expose half of the positive electrode to allow more of the spark to be exposed to the fuel micture. also, in the book that he saw this in they said it showed a 5 to 8 hp gain on a small block 350. I don't expect to see that kind of gain on our 3800'* but i DO think that it will show some gain. even if only 2 or so hp. just thought i'd pass that on to anyone else intrested in it, or anyone with a dyno that might want to see if there is a gain...

oh, and i don't see any adverse effects of it either, she gets and goes just as good if not better then before and idles smoother (probibly due to new plugs and wires).
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Old 09-12-2006, 10:52 PM   #2
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Same goes for indexing your spark plugs, point them towards the exhaust port rather than the cylinder wall, I was outside just looking at my spark plugs, does anyone have any pictures of the cylinder head fire deck so I can see how the spark plug is positioned?
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Old 09-12-2006, 10:54 PM   #3
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lowered KR for me... I run modified Autolight 103'*.

I open the gap, back cut the electrode, and round off all the edges.
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Old 09-12-2006, 11:11 PM   #4
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Originally Posted by llBlazin_llLo
lowered KR for me...
fill me in here, thats good right... the less the better.
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Old 09-13-2006, 03:25 AM   #5
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Th less KR the smaller pulley/more timing you can run... I don't run the pulley I run for no reason...
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