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A redesigned cylinder head and manifold for improved air flow. Variable exhaust valve timing (the LW2 engine only had variable intake valve timing) Specially-developed fuel injectors. New pistons with pentroof-style centre-domes and valve eyelets for a higher compression ratio of 12.2:1 (compared to 10.2:1 for the dual fuel engine).
The firing order has been changed from that shared by all previous Modular V8s (1-3-7-2-6-5-4-8) to that of the Ford Flathead V8 (1-5-4-8-6-3-7-2). [17] Compression ratio is 11.0:1, and despite having port fuel injection (as opposed to direct injection) the engine can still be run on 87 octane gasoline.
A 4-barrel carburetor was mated to a high-rise, dual plane intake manifold feeding high-flow cylinder heads that are still considered among the best of that era. [citation needed] Its big ports used 2.02 in (51 mm) intake and 1.60 in (41 mm) exhaust valves. An aggressive cam was fitted to take advantage of the much better breathing top end.
It offers the airflow of more expensive heads, at a much lower cost. It does, however, require a specific intake manifold (the L31 has four bolts per head attaching the intake manifold, as opposed to the "traditional" six bolts per head found on older Chevrolet small-blocks). Chevrolet's L31 was replaced by GM's LS-based 5.3L LM7 and 6.0L LQ4.
The 3.5 L EcoBoost V6 engine has been tuned and is rated at over 700 hp (522 kW; 710 PS), which is cooled by a roof-mounted air intake and new outboard-mounted intercoolers. [51] The removal of the adjustable ride height system and the stripped-out interior reduces the overall weight of the Mk II by about 200 pounds (91 kg) over the road car ...
Because its deck was taller, the heads were cast with wider intake ports so that earlier manifolds could be used with the new heads on the new taller block. For 1958, Chrysler offered the 392 in two configurations: 325 bhp (242 kW) with 9.25:1 compression and 345 bhp (257 kW) with 10:1 compression, both with a single four-barrel carburetor.
Due to the presence of turbocharging, the N63 does not use a variable-length intake manifold. The N63 is BMW's first V8 engine to use direct injection . The N63/S63 uses a bore of 89 mm (3.50 in) and a stroke of 88.3 mm (3.48 in) [except for the Chinese market 89 mm (3.50 in) and a stroke of 80 mm (3.15 in)].
The coolant pump / thermostat unit is located under the intake manifold regardless of generation, model year or application. The thermostat side is joined by a plastic union directly to the engine oil cooler, which in turn is mounted to and is an integral part of the ancillary / alternator bracket (also includes the oil filter housing in all ...