Posted by buickanddeere on March 23, 2018 at 19:21:01 from (173.241.110.156):
In Reply to: Gas mileage & plugs posted by 550Doug on March 23, 2018 at 04:55:11:
Not unless the plugs can add BTU’s of energy to the fuels . A trick at county fairs to sell “ wonder plugs” . Was to have an engine with timing retarded a couple of degree from stock and very short reach plugs installed .
Then the shyster extraordinaire would install the mileage plugs he was selling and the run engine at the same throttle setting . The engine would idle dozens of RPMs faster than with the short reach plugs .
Trick is the “wonder plugs” had a very long reach . This physically advanced the effective ignition timing . Via lighting the air/fuel mixture near the middle of the combustion chamber instead of on the side of combustion chamber . Making the engine idle faster and fooling Billy Bob and Bubba into purchasing shyster’s over priced plugs .
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