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hot or finewire plugs

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PilotPete

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Does anyone have any experience using hot plugs (eg. RHM-40E vs -38E) or finewire plugs (-38S) in their IO-540? I'm thinking of replacing my -38E's with something that is less susceptible to lead fouling. From what I've read online, both hotter plugs and finewires are supposed to help with lead scavenging.

The cost of f/w's is at least double that of the massives, but they are supposed to last 2-3x longer.

I run WOTLOPSOP most of the time, so my CHTs are down around 280-320F, which means the plug temps are pretty cool - maybe too cool for the scavenging agent to work. Hence the thought about running hotter plugs. The hot plugs cost the same as cold plugs, so that's a no-brainer for me.

But finewires are supposed to help with both fouling AND spark quality, and that is something that interests me running LOP. So I'm really tempted to bite the bullet and install f/w's, but before I do, I'd like to know if anyone else has been down this path before and has any words of wisdom. At $50-60/plug, it adds up pretty quickly.
 

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