Plug Gap
#1
Plug Gap
Did a recent build on my 06. Did the timkin conversion, welded the crank, went to 95" Keith Black, 10.3:1 after gaskets, 55G cams, Dan Vance Heads, Pro Pipe, PCIII - wondering how that might effect plug gap? Factory says .040...nightrider says every 12.5 increase HP should reduce gap .004. So if factory is ball park 60HP on a TC88 - and my build gets me to about 105HP = .026. Seems way too low and will cause problems at higher RPMs. Currently at .038 but wondering if I might be missing any performce/power.
#4
#6
If your plugs are the Iridium tip plugs i do not recomend messing with the gaps, for damage to the electrode may occur.
#7
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#8
here is what a very smart engine/motor builder told me regarding plug gaps. Use the smallest you can get away with. He said .040 works great on a stock engine becasue the spark (kernal) is large and can ignite the whole mixture but as you make more compression ie more power if you have too wide of a gap the force can blow the spark out so you want a small kernal of spark. He also recommended .035 to .038.
#9
here is what a very smart engine/motor builder told me regarding plug gaps. Use the smallest you can get away with. He said .040 works great on a stock engine becasue the spark (kernal) is large and can ignite the whole mixture but as you make more compression ie more power if you have too wide of a gap the force can blow the spark out so you want a small kernal of spark. He also recommended .035 to .038.
As the cylinder pressure comes up, the turbulence in the chamber increases dramatically,
and in the gap is too wide, it'll literally blow the spark out, as you have said.
When the gap is tightened, the spark intensifies, and is much harder to be disrupted at that point.
That was taught to us, by ourselves, while attending the school of hard knocks years ago.
Scott
BTW, a motor is an electrical device.