Which is better 6.4 or 6.7

Like pretty much all modern diesel engines, both the 6. This compound system was manufactured by BorgWarner and combined a 65mm fixed geometry turbo with a 52mm variable geometry turbo. When combined these turbos produced over 40psi of boost in totally stock form. To put it simply, the compound setup on the 6.

The first turbo is the Garrett GT32 SST, which is a very interesting single sequential design, using two 46mm compressor wheels into a dual inlet compressor housing and made use of a tiny 64mm turbine wheel on the exhaust side. A cool feature of this turbo is that it is a wastegated variable geometry turbocharger. Traditionally, variable vane turbochargers do not require a wastegate system, but rather prevent turbocharger over-speeding by opening vanes in the turbine housing.

Ultimately, the Garrett GT32 SST provided great throttle response and a massive amount of low-end torque, but it lacked top-end power and once an aggressive tune was involved, shaft speed could increase to , rpm or more, resulting in overspeed failures. In to current 6. The EGR systems used on Powerstroke engines have come a long way since the days of the 6. Starting with the 6. The EGR system on the 6. Just like EGR, both the 6. Satellite Radio Ready 6. Side-Impact Air Bags 6. Tow Package 6.

Trim Tradesman 6. Recently Modified New this week. Advanced Search Keyword search:. Stock or VIN :. Details 14 More. Ask A Question. Schedule A Test Drive. Get Today's Price. Engine: 6. Explore Financing. Window Sticker. New RAM Tradesman. Call To Inquire. Details 28 More. Let our team save you time by taking advantage of Let our team save you time by taking advantage of our website tools to value a trade, should you have one.

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Contact Us Close. This vehicle is being built now. Its reputation for reliability and high-mile durability is often compared to the venerable 7. Its performance potential and dependability has even converted Duramax and Cummins fans to Ford owners.

So why is the 6. After all of the issues associated with the 6. By taking its diesel engine program fully in-house and bringing outside experts onboard to help with its development, FoMoCo delivered. It might not be the greatest compression-ignition power plant ever created, but it is arguably the best Power Stroke ever assembled. Share 2. Tweet 0. Pin it 1. Up next. Share article The post has been shared by 3 people. Facebook 2. Twitter 0. Pinterest 1. Mail 0.

Big low-rpm torque, insurance to facilitate future increases in cylinder pressure i. Use of a CGI crankcase was one of many firsts the 6. However, in performance applications where big horsepower is the name of the game, the 6. As for the 6. That said, hard-part failures are few and far between on the 6. For an apples to apples comparison between the two most powerful Power Strokes to ever grace Ford Super Dutys, keep scrolling. One of the best parts on the 6.

By tying directly in to the block itself, traditional main bearing caps are eliminated, as is main cap walk. Main cap walk was highly common on the 7. Cast from compacted graphite iron by Tupy, the 6.

The CGI block, in addition to the aluminum cylinder heads more on that in a bit is a big reason why the 6. There is no bed plate to secure the crankshaft, but nodular iron six-bolt main caps are employed. All 6. The powdered-metal connecting rods used in the 6. While nowhere near the size of the rods used in the 6. They feature a degree, cracked cap design and are made from powdered-metal. The reverse-flow heads take in air via the valve covers and expel exhaust gases into exhaust manifolds located in the lifter valley where you would find an intake manifold on a conventional V8.

With the exhaust manifolds mounted in the valley, shorter up-pipes are required to feed the turbo, which aids both responsiveness and emissions. On the intake side, the 6. Inside the 6.