Ford Cyclone engine

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Ford Cyclone engine
Duratec 3.5L, 4V Engine
ManufacturerFord Motor Company
Also calledDuratec 35
Duratec 37
Mazda MZI
Type60° V6
Production2006 – present
PredecessorFord Mondeo V6
Bore3.64 in (92.5 mm)
3.76 in (95.5 mm)
Stroke3.41 in (86.7 mm)
Displacement213 CID (3496 cc)
227 CID (3721 cc)
Block alloyAluminum
Head alloyAluminum
ValvetrainDOHC with Direct Acting Mechanical Buckets

The Cyclone engine is Ford Motor Company's latest DOHC V6 family of gasoline engines. [1] It will gradually replace the Mondeo family of V6 engines over the next several years. The first version, a 3.5 L Duratec V6, appeared in September 2006 in the Lincoln MKZ. Mazda badges its versions of the Cyclone MZI as it did with its versions of the Mondeo V6.

Notable Cyclone features include a capacity for displacements ranging up to 4.0 L, [1] DOHC 4-valve per cylinder heads, direct acting mechanical bucket (DAMB) camshaft tappets, and variable cam timing (VCT) on the intake camshafts. Features such as Gasoline direct injection, turbocharging, variable length intake manifold and VCT on the exhaust camshafts were considerations in the design phase and are to be added to the engine as it continues to be installed in more applications. The Duratec 35 is ULEV-II compliant and is capable of meeting the PZEV requirement.

Duratec 35

The Duratec 35 displaces 3.5 L (3496 cc, 213 CID) with a 92.5 mm (3.64 in) bore and 86.7 mm (3.41 in) stroke. Due to packaging differences (primarily the relocation of the water pump to the valley), the 3.5 L engine will fit into the any engine bay the smaller Mondeo 3.0 L will, and replaced it in some applications (notably the Ford Taurus) in the 2008 model year. Production began in 2006 for the Ford Edge, Lincoln MKX, and Lincoln MKZ. Ford expects the engine to be available in 20% of its vehicles by the end of the decade.

Official SAE certified engine output is 265 hp (198 kW) and 250 lb·ft (339 N·m) on 87 octane gas, but will exceed 300 hp (224 kW) once planned features such as gasoline direct injection (GDI), twin independent variable cam timing (TiVCT), and a variable runner length intake manifold are added. This is a substantial upgrade in power from the Duratec 30 and bested all comparable 87 octane rated V6 engines at the time of its launch. [2].

The engine is assembled at Lima Engine in Lima, Ohio, with expansion planned in Cleveland Engine Plant #1.

The Duratec 35 was on the Ward's 10 Best Engines list for 2007.

The 3.5 L Duratec 35 installed in a 2007 Lincoln MKZ


Future applications:

Duratec 37

The Duratec 37 is a 3.7 L (3721 cc/227 CID) version of the Cyclone V6 intended to power heavier or premium vehicles. The Duratec 37's additional displacement comes from an increase in bore diameter to 95.5 mm (3.76 in), stroke remains identical to the Duratec 35s at 86.7 mm (3.41 in).

A Hiroshima, Japan assembled Mazda MZI 3.7 was installed in the 2008 Mazda CX-9 and was the first 3.7 L Cyclone V6 to see production. The first Duratec 37 saw production in the 2009 Lincoln MKS.


  • 273 hp (204 kW) at 6250 rpm and 270 lb·ft (366 N·m) at 4250 rpm
  • 272 hp (203 kW) at 6250 rpm and 269 lb·ft (365 N·m) at 4250 rpm
  • 275 hp (205 kW) at 6250 rpm and 276 lb·ft (374 N·m) at 4250 rpm
  • 268 hp (200 kW) at 6250 rpm and 267 lb·ft (362 N·m) at 4250 rpm

TwinForce / EcoBoost

A direct-injected, twin-turbocharged version of the all-aluminum Duratec 35 has been developed, producing 430 hp (321 kW) and 400 lb·ft (542 N·m) of torque. The TwinForce 3.5 L V6 is intended to deliver the performance (on demand) of a typical large displacement 6.0 L-class V8, with the normal driving (highway) fuel efficiency of a 3.0 L to 4.0 L class V6.[3][4] The engine is also capable of operating on any mix of E85 ethanol and premium gasoline, and made its debut in the Lincoln MKR concept coupe/sedan, introduced at the 2007 North American International Auto Show.

Gasoline direct injection more precisely manages fuel flow into the cylinders, for more efficient combustion and emissions control, when compared to port injection. Twin-turbocharging forces more air into the engine on demand, allowing additional fuel to be injected and burned, producing more power: 118 hp (88 kW) per liter in the case of the TwinForce. Technologies for the twin turbocharging system were developed in cooperation with Volvo Cars, and the gasoline direct injection system is a joint development between Ford and Bosch based on Bosch DFI systems already in production.

At the 2008 NAIAS, Ford introduced a similar gasoline turbocharged direct injected engine family called EcoBoost, scheduled for production starting in 2009.[5] The EcoBoost family is expected to be available as four-cylinder I4 and six-cylinder V6 versions. The 2010 Lincoln MKS is scheduled to kick off EcoBoost production, with a 3.5 L V6 version estimated at 340 hp, in mid-2009, followed closely by the Ford Flex. Ford also plans to bring out a 4 cylinder version. The Engine displaces 1.6L and was first shown in the Lincoln C, it produces 180 hp (134 kW) and 180 lb·ft (244 N·m). It is also capable of achieving 43 mpg (5.5L) on the highway. It was also showed with fords Powershift Transmission. [6].

The Ford Explorer America and Lincoln MKT concept crossover utility vehicles, which debuted in the 2008 NAIAS, show a similar displacement GTDI EcoBoost engine with up to an estimated 415 hp.[7] The company eventually plans to equip a half-million cars and trucks annually with turbocharged EcoBoost engines by 2013.

See also

External links