Quote:
Originally Posted by NASTY99Z28
So if they get over 30hp and 30lbft from a factory e85 tune on the 5.3, the 6.2 should match or beat it which woułd put it at 450/490ish. That's almost 500 pound feet if torque from a stock small block pump gas engine....INSANE!!!
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The problem, in truck circles, with all-out tunes for ultimate numbers is that you lean 'em out so much that their towing capacities actually suffer... Strap on a gardening trailer, or a part-capacity load, and
ping-ping-ping! The "numbers" improvement comes at the expense of the "fat" fuel curves put in place to safeguard a to-capacity towing/hauling intended use.
Tunes for straight-line performance? OK. For regular truck duties? Not so...