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[5]: 87 This engine has revised cylinder heads with larger valves, larger intake manifolds and exhaust port tubes, and a dual exhaust system. [2]: 80, 81 The 140 hp (104.4 kW) engine also has four carburetors; two Rochester HV primaries and two Rochester H secondaries controlled by a progressive throttle linkage. The 140 hp (104.4 kW) engine ...
Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads, as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability. Ports can be modified for maximum power, minimum fuel consumption, or a ...
The general adoption of rotary valves in the place of poppet valves in combustion engines was prevented by the issue of sealing. Poppet valves have a seal around the tapered flange of the opening, and this seal improves with increased working pressure in the combustion chamber because the pressure forces the valve shut.
Lotus marketing material from the S3 period quoted the SE variant at 115 bhp (86 kW), noting high lift cams, carburetor re-jetting and a four branch exhaust. [ 10 ] The final version of the Workshop Manual revised these numbers, as shown in the following tables. [ 11 ]
Replaced exhaust manifold with refurbished and ceramic coated unit. Replaced mechanical ignition system with an electronic unit. Fixed non-working fan in the cooling jacket for the battery. Replaced exhaust system with a stainless steel unit. Repaired non-working lock-nut on the adjustable reach of the steering column.
The Vulcain for the Ariane 5 rocket uses a similar cycle design to F-1 engine, with the turbine exhaust gases piped directly overboard. As part of the Space Launch System (SLS) program, NASA had been running the Advanced Booster Competition, which was scheduled to end with the selection of a winning booster configuration in 2015.