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Old 07-24-2010, 08:48 PM
SDLuck SDLuck is offline
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Reading spark plugs is like a science.I spent a lot of time on a dyno many years ago.Either go to a dyno or change jets and read mph.Anything else is asking for trouble.On a 1600 vw we dynoed the operator killed the motor on a load and we checked the plugs, they looked lean to all of us .The dyno operator was quiet,so I asked him. He said he couldn't read spark plugs but by the bsfc numbers it was rich so we leaned it out and over the process picked up 12 hp.Plugs always looked lean
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