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Tuning by air/fuel ratio

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rrc1962

rrc1962

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Just wondering why the rest of the free world tunes engines by reading air/fuel ratio and we just sort of guess. I know that tuning by reading the EGT's works, but an instrument like the one below would allow you to nail the perfect AF ratio every time regardless of temp, altitude, RPM, etc.

http://www.innovatemotorsports.com/products/MTXL.php
 

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