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The 5.8 is formally known as the Trinity Engine or 5.8-liter V8 engine, which benefits from cylinder heads with improved coolant flow, Ford GT camshafts, piston-cooling oil jets similar to those found on the 5.0 Coyote, new 5-layer MLS head gaskets, an over-rev function that increases the red line to 7000 rpm for up to 8 seconds (from 6250 rpm ...
The heads from the Boss 302 became the production heads on the 335-series 351 cu in (6 L) "Cleveland" engines, which used the same bore spacing and head bolt configuration as the small block engines. As the 1980s drew to a close, Ford began the design of a new OHC V8 to replace the venerable small block design.
Note: this is commonly called the Ford Small-block V8 pattern, though it is used in some "big block"-sized V8's as well as some V6's and I6's. 200 I6 1978-1983 only, partial (4 of 6 bolts) pattern. 250 I6 (except Australian 250/4.1) 255 V8; 289 V8 - (made after August 3, 1964) - had 6 bolts holding bellhousing to block; 302 Cleveland (Australia)
The series launched with a die-cast aluminum engine block, aluminum cylinder heads and magnesium cylinder head covers. [1] All UR engines feature variable valve timing for both intake and exhaust cams or Dual VVT-i. Timing chains are used to drive the camshafts. The UR engine has been produced in 4.6, 5.0, and 5.7-liter displacement versions.
While the engine block is the same size as the V8, the cylinder heads are shortened versions of the V8 heads. It is made on the same production line as the AJ133. The AJ126 is a 3.0 L; 182.8 cu in (2,995 cc) 90° petrol V6, having a bore and stroke of 84.5 mm × 89 mm (3.33 in × 3.50 in) with a 10.5:1 compression ratio.
In the 1950s, Ford introduced a three-tier approach to engines, with small, mid-sized, and larger engines aimed at different markets. All of Ford's mainstream V8 engines were replaced by the overhead cam Modular family in the 1990s and the company introduced a new large architecture, the Boss family , for 2010.
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