I've been looking around old posts for stuff about hotter plugs.
Mo said
I've been using NGK XR4 plugs for 3 full seasons now...they run hotter than anything we have been proclaiming ... my mileage improved, I have no crud on my plugs, and haven't had a problem with the engine as such.
Caleb said
I've begun using Autolite 437 spark plugs which are supposed to be hotter and have been impressed with how little they seem to soot up the way the Champion RJ12C plugs did in my old engine.
Dave said
open up the gap a bit to make it hotter
Carl said
Larger gap also leads to premature wear on ignition components, for points 035 is good.
There seems to be a downside to opening up the gap. Is there a downside to hotter plugs. If not, who recommends what: Autolite 437? NGK XR4? Something else?
Simon
Mo said
I've been using NGK XR4 plugs for 3 full seasons now...they run hotter than anything we have been proclaiming ... my mileage improved, I have no crud on my plugs, and haven't had a problem with the engine as such.
Caleb said
I've begun using Autolite 437 spark plugs which are supposed to be hotter and have been impressed with how little they seem to soot up the way the Champion RJ12C plugs did in my old engine.
Dave said
open up the gap a bit to make it hotter
Carl said
Larger gap also leads to premature wear on ignition components, for points 035 is good.
There seems to be a downside to opening up the gap. Is there a downside to hotter plugs. If not, who recommends what: Autolite 437? NGK XR4? Something else?
Simon
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