Ford Duratec V6 Versions
The Duratec is a range of four, five, and six-cylinder gasoline engines produced by the Ford Motor Company, used in Ford, Mazda, Aston Martin, Volvo, Caterham, Morgan, Tiger, Ginetta cars and by specialist engine tuner Cosworth.
Originally there was a 2.5 L V6 introduced with the Ford Mondeo. When the 2000 Mondeo was introduced, the 1.8 L and 2.0 L engines became Duratecs too. Now there are engines of all sizes called Duratec. In North America, Ford uses the Duratec name on all its dual overhead cam 4- and 6-cylinder engines. In Europe, all Ford petrol engines are called Duratec.
The 2.5 L and 3.0 L V6 Duratecs are evolutions of the same design, first used in the 1994 Ford Mondeo (1995 Ford Contour in US). It is a modern aluminum DOHC V6 with a 60° bank angle. They were also used in the Ford Cougar.
The Jaguar AJ-V6 engine and Mazda's AJ engine featured variable valve timing.
The Duratec 25 is a 2.5 L (155 CID; 2544 cc) 60° V6 and was introduced in 1994. It was developed for the Ford Contour and used in the Ford Mondeo, Mercury Cougar, Mercury Mystique, Jaguar X-Type, and others. The Duratec 25 was on the Ward's 10 Best Engines list for 1995 and 1996, and the SVT version made the list for 1998 and 1999.
An SVT version produced 195 hp (145 kW) and 165 lb·ft (224 N·m) in 1998. Further improvements were made in 1999 that raised power output to 200 hp (149 kW) and 169 lb·ft (229 N·m) and were carried over in the 2000 model,14 L/100 km (17 mpg-US). The SVT engine was used in the 1998-2000 Ford Contour SVT, as well as the Ford Mondeo ST200 which was a limited edition model produced, and sold in Europe.
Bore is 82.4 mm (3.2 in) and stroke is 79.5 mm (3.1 in) on most 2.5 L Mondeo-derived engines for a total of 2544 cc. Mazda used the same block and camshaft in their 2000 MPV. However, they reduced the size to 2.49 L to keep under a 2.5 L tax cap in Japan. It was replaced in 2002 with the larger 3.0 L Duratec 30-based Mazda AJ.
The 3.0 L Duratec 30 or Mazda AJ was introduced in 1996 as a replacement for the 3.8 L (230 cu in) Essex V6 in the up-market versions of the Ford Taurus/Mercury Sable. It has 2,967 cc (181 cu in) of displacement and produces between 200 hp (150 kW) and 240 hp (180 kW). With an aluminum block and cylinder heads, it is the same basic engine used in the Jaguar S-Type, Lincoln LS, Mazda MPV, Mazda 6, Mondeo ST220 and many other Ford vehicles. It is essentially a bored-out (to 89 mm) Duratec 25 and is built in Ford Motor Company's Cleveland Engine #2 plant in Cleveland, Ohio. A slightly modified version for the Ford Five Hundred entered production at the Cleveland #1 plant in 2004.
There are two key versions of the first-generation Duratec 30:
- DAMB - The Lincoln LS and Jaguar AJ30 versions have direct-acting mechanical bucket (DAMB) tappets. Output is 232 hp (173 kW) at 6750 rpm with 220 lb·ft (298 N·m) of torque at 4500 rpm.
- RFF - The Taurus/Sable/Escape version uses roller finger followers (RFF) instead and produces 201 hp (150 kW) at 5900 rpm with 207 lb·ft (281 N·m) of torque at 4400 rpm.
Variable Cam Timing
The 2006 Ford Fusion, Mercury Milan, and Lincoln Zephyr feature a version of the Duratec 30 using variable valve timing. The engine has an output of 221 hp (165 kW) at 6250 rpm, and 205 lb·ft (278 N·m) of torque at 4800 rpm.
The final major revision of the Duratec 30 was seen on the 2009 Ford Escape and Mercury Mariner small SUVs. Cam-torque-actuated iVCT was introduced in this version along with better breathing heads. The result is a bump from the previous version's 223 bhp (166 kW; 226 PS) to 240 hp (180 kW) at 6550 rpm. The newly refreshed engine made its way into the redesigned Ford Fusion as the optional base V6, and the Mercury Milan as the only V6 for the 2010 model redesign.
The 3.0L delivered ample power in the midsize sedan segment, however the Fusion later received the Duratec 35 V6 as a top-tier "Sport" option to remain competitive with larger V6 offerings in the Toyota Camry and Honda Accord. The Duratec 30 remained as a step up from the base I4 in the Fusion, but the Milan kept the 3.0L as its sole V6 until it was discontinued for the 2011 model year. The 3.0L Has the potential to deliver more power, but it is believed to be nearing the end of its development; Ford will begin to phase it out in favor of newer engine lines. The Duratec 30 will be dropped as the higher-end powerplant in the 2013 Escape in favor of the 2.0L EcoBoost I4, which produces similar power, more torque, and better fuel economy. As shown in the 2013 Ford Fusion, the Duratec 30 will also be replaced by the EcoBoost 2.0L. It is unlikely that another revision of the engine will appear in any future Ford vehicles, and will be replaced by the EcoBoost 2.0L I4, and Cyclone 35 V6. The original version of the engine without iVCT is available as a crate engine from Ford Power Products, producing 232 bhp (173 kW; 235 PS).
A Twin-turbocharged version of this engine is used in the Noble M400, a British sports car. The engine is rebuilt and tuned to a max power of 425 bhp (317 kW) at 6500 rpm, with a torque figure of 390 lb·ft (529 N·m) at 5000 rpm. Noble has used forged pistons, an oil cooler, a larger baffled oil sump and extra cooling ducts to maintain its durability. 29 L/100 km (8.1 mpg-US)
Mazda's MZI version adds variable valve timing, as does Jaguar's AJ30. Note that the MZI name is also used in Europe on Mazda's version of the Ford Sigma I4. The 3.0 L, 226 hp (169 kW) V6 used in the Mondeo ST220 is called Duratec ST. The 3.0 L 204 hp (152 kW) V6 in the Mondeo Titanium is called Duratec SE. 28.1 mpg-US (8.37 L/100 km; 33.7 mpg-imp)
A racing version of this engine exists and is used on mini prototypes like the Juno SS3 V6. It is a 3.0 liter naturally aspirated non variable timing engines producing between 350 and 400 horsepower with a red line of around 8700 rpm. The engine has a 40 hour racing life span before it needs to be rebuilt with rings and bearings, and has proven very reliable and competitive. The engine has a Jaguar badge, and is branded as a Jaguar 3.0 liter V6 since it is built and mostly sold in the U.K.
The Duratec 35 is a 3.5 L (3496 cc; 213 CID) V6 with a 92.5 mm (3.64 in) bore and 86.7 mm (3.41 in) stroke. It began production in fall 2006 and is the first member of the all-new Ford Cyclone engine family.The D35 is an all-aluminum DOHC 4V 60° bank angle V6 engine with variable cam timing on the intake camshafts and DAMB tappets. The Duratec 35 is ULEV-II compliant and is capable of meeting the PZEV by adding a zero evaporative emission fuel system and extending the emissions system warranty to 15 years or 150,000 miles for models in California and some Northeast states.
The first generation of the Duratec 35 V6 with iVCT produces 265 hp (198 kW) at 6,250 rpm and 250 lb·ft (339 N·m) at 4,500 rpm in the following applications:
The engine produces 263 hp (196 kW) at 6,250 rpm and 249 lb·ft (338 N·m) at 4,500 rpm in the following applications:
- 2007–present Lincoln MKZ
- 2008–present Ford Taurus
- 2008–2009 Ford Taurus X
- 2008–2009 Mercury Sable
- 2009–present Ford Flex
- 2010–2012 Ford Fusion Sport
The second generation of the Duratec 35 with TiVCT produces 285 hp (213 kW) at 6,500 rpm and 253 lb·ft (343 N·m) at 4,000 rpm in the following applications:
The engine produces 290 hp (216 kW) in the following applications:
- 2011–present Ford Explorer
It is a twin turbocharged, gasoline direct injected (GTDI) version of the Duratec 3.5L.
2011 Mazda CX-9 Duratec 37 engine 3.7 L
The Duratec 37 3.7 L (3721 cc; 227 CID) V6 is another member of the Ford Cyclone engine family. The Duratec 37's additional displacement over the Duratec 35 is achieved through a 3 mm (0.1 in) increase in bore diameter which results in a 95.5 mm (3.76 in) bore. It is currently produced at Lima Engine in Lima, Ohio and Cleveland Engine in Cleveland, Ohio.
The engine was first introduced in the 2008 Mazda CX-9 under Mazda's MZI moniker and produced 273 hp (204 kW) at 6,250 rpm and 270 lb·ft (366 N·m) at 4,250 rpm.The American assembled version seen in the 2009 Lincoln MKS produces 275 hp (205 kW) at 6,250 rpm and 276 lb·ft (374 N·m) at 4,250 rpm. A few days before the 2009 Los Angeles International Auto Show, Ford unveiled a new version of the Duratec 37 for the 2011 Mustang, making it the first Duratec-badged V6 used in a rear-wheel drive application since the Mondeo V6 in the Lincoln LS. The new version of the engine features Twin Independent Variable Cam Timing (Ti-VCT) and, thanks in part to the addition of this technology, makes 305 hp (227 kW) at 6,500 rpm and 280 lb·ft (380 N·m) at 4,250 rpm while delivering 31 mpg-US (7.6 L/100 km; 37 mpg-imp) highway mileage in the Mustang. This RWD Ti-VCT version has also since been added to the engine lineup of the F-150 pickup for 2011.
- 2008–2011 Mazda CX-9
- 2009– Mazda6: 272 hp (203 kW) at 6,250 rpm and 269 lb·ft (365 N·m) at 4,250 rpm
- 2009– Lincoln MKS: 300 hp (224 kW) at 6,500 rpm and 280 lb·ft (380 N·m) at 4,000 rpm
- 2010– Lincoln MKT: 268 hp (200 kW) at 6,250 rpm and 267 lb·ft (376 N·m) at 4,250 rpm
- 2011– Ford Mustang: 305 hp (227 kW) at 6,500 rpm and 280 lb·ft (380 N·m) at 4,250 rpm
- 2011– Ford Edge Sport: 305 hp (227 kW) at 6,500 rpm and 280 lb·ft (380 N·m) at 4,000 rpm
- 2011– Lincoln MKX: 305 hp (227 kW) at 6,500 rpm and 280 lb·ft (380 N·m) at 4,000 rpm
- 2011– Ford F-150: 302 hp (225 kW) at 6,500 rpm and 278 lb·ft (378 N·m) at 4,000 rpm
- 2012– Ginetta G60: 310 hp (231 kW) at 6,500 rpm and 288 lb·ft (390 N·m) at 4,500 rpm