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Old 06-23-2020, 07:17 PM   #3
Dave Noll
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Default Re: Racepak O2 sensor

Quote:
Originally Posted by FireSale View Post
13.8 is rich by around one point. Perfecto is 14.7.
14.7:1 is only perfect for a street car on pump gas. It is a compromise that a few different factors meet @ to be stoichometric. (for emissions to make the catalytic converter work its best) USUALLY, when you mash the gas you want the AFR to drop to around 12:1 - 13:1. Different manufacturers and different cyl head designs, compression ratio's and probably several other factors determine where an engine makes its best power @.

18:1 works for mileage but sucks for power, if you can keep the fire lit.

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Last edited by Dave Noll; 06-23-2020 at 07:28 PM.
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