UREM37BY Plugs

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7985
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UREM37BY Plugs

Post by 7985 »

Is the long reach Tempest UREM37BY spark plug safe to use on a C90 engine with Millenium cylinders? The Tempest application chart says yes, but I have heard rumors about the long reach plugs being too close to the piston.
2356
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Re: UREM37BY Plugs

Post by 2356 »

I can’t speak for there use in a C90 but they work quite well in my O200.
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6643
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Re: UREM37BY Plugs

Post by 6643 »

7985 wrote: Fri Sep 04, 2020 10:46 amI have heard rumors about the long reach plugs being too close to the piston.
I am not aware of any issues. I don't think there's any significant difference. The increased compression comes from greater displacement, not a smaller combustion chamber.
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6898
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Re: UREM37BY Plugs

Post by 6898 »

piston at TDC use a 1/2" wood dowel rod measure to cylinder base at plug and remember theirs a copper washer to add.
Jeff T 1948 C-140 NC3600V
Past President 120 140 Assoc. 2019-2023
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