Quote Originally Posted by leorilla View Post
What are the advantages of changing from TBI to carbuerator if any?
Assuming you're talking the OEM unit, the TBI gives you ECU controlled air/fuel ratio across the load range, adjusting automatically for variations in barometric pressure whether due to altitude changes or just weather, inlet air temperature, and probably uses a knock sensor. Your Lambda settings will maximize cruise efficiency for best attainable mileage. If you change to a carburetor you'll select jets to optimize your WOT airflow at your highest power point (multiple runs, pulling plugs to gauge the air/fuel ratio by electrode color), and once you have it jetted in for max power start working on finding the best metering rods, springs and accelerator pump settings to yield the best cruise efficiency you can get, along with the best throttle response. Once you have it dialed in it will be good for normal barometric pressure changes for that area, but will be off if you normally go from sea level to the mountains, and your efficiency will vary from the deep cold of winter to the heat of summer. In short, you're taking a step backwards if you ditch the EFI system, IMO. Others may well disagree.