TheLion
Well-Known Member
I did the math as well and came to the same conclusion. The GT makes only 1% less power on 87 than it does on 93. That's 4.35 hp aka 5hp roughly. Not gonna notice a difference between 430 and 435 hp....same torque btw on 87 and 93.I had a 2012 GT Auto premium and ran mostly regular. Tried premium and not a noticable difference. I now have a 2015 Mustang Ecoboost auto premium PP. Have to run Premium or it falls on its face. I went to FP now I have to run premium. I keep very good track of my mileage and the GT averaged about 21-22 with 27 on long trips, The 2015 Eco averages 25 with 32 to 33 on long trips. Now Premium is up to 50 cents more a gallon! Do the math, it costs almost the same to drive either car. I know from experience! Don't choose the Eco over the GT based on fuel costs if you want full performance from your Mustang Ecoboost! I do like the everyday low speed punch of the turbo, much more fun to drive on the crowded curvy highways around my home, but the acceleration of the GT when punched at 40 MPH is AMAZING!
I just recently traded up from my FP tuned EB to a Ruby Red PP GT, same year (2016) for only 110 more on my monthly. Nice thing is I can beat that 5.0 all day long and it will just keep ticking. The rods and crank are also forged, but each cylinder is under much lower pressure. NA engines are also far more forgiving when it comes to knock and malfunctions. The 5.0 has everything in it already, even an oil cooler which none of the EB's came with from the factory no matter what option you went with when they really needed one.
At this point I think smaller displacement TDI engines make the most sense in daily drivers or as sub-versions like in the EB Mustang, if you stay out of boost you can get a reasonable fuel economy advantage. But if you get into boost your fuel economy drops like a rock because your making power...no surprise there. But too many people are thinking the 2.3L will be a 5.0 sans the sound and it just won't be, not without putting some big money into a built bottom end, big turbos or exotic fuels, none of which makes any practical sense if you want a fun, fast and affordable muscle car / sports car. Better to step up to the 5.0...not only that is the thing sounds absolutely beautiful. Mine came with an after market corsa axle back and it sounds a lot like the Challenger Hell Cat. Great sounding car, pure music!
If you want big power, there is no replacement for displacement. Also a stock 5.0 will still easily best a FP tuned and inter cooled EB and the 5.0 has a decent amount of room to grow if that's not enough (and I'm not even talking about the new Gen 3 5.0 making 460 hp / 420 ft-lbs). FP Stage 3 power pack for the gen 2 5.0 gives you a 7500 RPM redline, 37 more peak HP and 60 more HP at 7500 RPM for $1,900 all under a factory warranty. Then there's the super charger kit, 670 hp...there is just no replacement for displacement. TDI engines make sense in certain applications, but when it comes to going fast reliably on pump gas, big meaty V8's are still the best option for the cost.
You can FI a 5.0 with two twin scroll turbos just like a 2.3L as well. Put in forged pistons, upgrade the forged rods etc. and it will always make far more power than the 2.3L. Roughly double...because it has well...double the cylinders (and slightly larger displacement per cylinder). There's just nothing like the 5.0. TDI engines are also far less forgiving to user errors or malfunctions or manufacturing tolerances as well, so there are added risks (yes this would apply to a FI 5.0 as well). How fast is fast enough though? 99% of us have them for street cars for fun. At some point it's fast enough and I personally think we are at that point with the current generations of V8's from Ford, GM and Dodge.
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