If you're making 300 hp @ 2600, and you're redlining at 6500, your engine should be at 750 ish by math, but not sure how if it works the same with turbos.[/QUOTE]
how did you get 49.44 from a 3.7 Mustang? what terrain was it over and how many miles were driven to make that average? You would be surprised what a flat highway can do for mileage, I drove from Phoenix to LA in my stock 98' Crown Vic 4.6L V8, from Phoenix to Blythe I averaged 30 mpg in the Summer w/ A/C on and 80 mph ... from Blyth to LA it dropped to 24.5 mpg.... because of the hills and some brief stop and go close to LA...404 mi door to door
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