I just went thru same thing with my car.Changed over to a resistor plug,car is running tops.Was using a NGK 4554 R5671 before TR6 install now a BKR6E 6992.
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I'm about to install a TR-6 in my car.I do have champion aluminum heads,6766 running 93 with alky.Im looking for any recommendations on what sparkplug to use.I hear a resistor sparkplug is recommended.
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Im having issues with my cam sync and getting a code 13 with my TR-6. I was told to use resistor type plugs.Looking to get recommendations to which ones to use.Im running 93 with alky.
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If I was to do it again l would use shorter rod with a custom piston.Side wall pressure on cylinder wall be minimal.Making the block live longer and able to run longer duration cam.