Quote:
Originally Posted by GUMP
If it is such a bad combination, why would anyone want to build it? Especially when it is now legal to run the 302/2.9 combination which has already performed better than the 5.4/4.0 examples that you have given.
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It's not a bad combination, in fact the 5.4L engine has a stronger block and is just more durable all around than the 5.0L.
To take an 08,10, or 12 car and switch it over to a 5.0L would cost and enormous amount of money. You have to buy a race ready engine, change your fuel system, headers, air intake, motor mount brackets, radiator, hoses, wiring, and computer. Not to mention the drivetrain items like torque converter, gearing (both trans and rear), even suspension setup. Based on the RPM and power band of that motor. It's a very big investment. On top of that the R&D time at the track and dialing in the combination. If you keep the 5.4L as it originally came in the car, only 08 and 10 cars would need the camshafts change. Then $4,500 for the 4.0L Supercharger and your done. You could easily convert any 08,10,12 car from a 5.4L 2.3L combination to a 5.4L 4.0L.
Jim D'Amore