Jim Oaks
Just some guy with a website
Administrator
Founder / Site Owner
Supporting Vendor
Article Contributor
TRS Banner 2010-2011
TRS Banner 2012-2015
TRS 20th Anniversary
VAGABOND
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GMRS Radio License
TRS 25th Anniversary
- Joined
- Aug 2, 2000
- Messages
- 13,524
- Reaction score
- 8,789
- Points
- 113
- Location
- Nocona, Texas
- Vehicle Year
- 1996 / 2021
- Make / Model
- Ford Ranger
- Engine Type
- 4.0 V6
- Engine Size
- 4.0 / 2.3 Ecoboost
- Transmission
- Automatic
- 2WD / 4WD
- 4WD
- Total Lift
- 6-inches
- Tire Size
- 33x12.50x15
A special twin DOHC (QUAD CAM) version of the 2.9 was created by Cosworth Engineering in 1991. Although it shared the same block as the standard 2.9, power output was up to 192 hp (143 kW) and torque was boosted to 275 lb⋅ft (373 N⋅m) at 4500 rpm. This engine (code BOA) was used in the Ford Scorpio Cosworth 24V. This engine configuration was only paired with an improved A4LDe automatic gearbox with partial electronic shift control. No manual gearbox was offered from the factory.
The standard Ford-issued block was machined differently to improve strength. In place of the single-cam arrangement, an endless duplex hydraulically tensioned timing chain was used to drive the overhead cams. The chain measured 2.2 m (7 ft 3 in). The casting and bearings for the standard underhead cam were repurposed for a shaft which drove the oil pump. Ignition was controlled by an EDIS-6 system, which would become a standard feature.
The engine was known for its substantial increase in power delivery above 4000 rpm relative to the unmodified version; in recent years, the engine has become a popular choice as a replacement engine for the Ford Sierra XR4x4 and XR4i.
An improved version of this engine (code BOB) was available in the restyled 1995 Ford Scorpio. Differences included two simplex chains with two hydraulic tensioners and the addition of a variable-length intake system called VIS. Power output was increased to 210 bhp (157 kW; 213 PS). This was mated to a fully electronically controlled A4LDE automatic transmission.