Here's the numbers for a plain jane stock truck with a 5.4 3V. Custom tunes as follows.
87oct up to 25hp
93oct up to 35hp
Add in CAI maybe a little more hp.
I don't recall the numbers for the canned tunes.
Just remember everyone's truck is different and responds differently to custom tunes, just depends on your driving style and HEX code.
Remember these are trucks not mustangs!
The biggest bang for your buck is a supercharger! But they are expensive and you have to stick with 91+oct gas.
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