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Rochester Ramjet system installed on a 1957 Chevrolet 210. The Rochester Ramjet is an automotive fuel injection system developed by the Rochester Products Division of General Motors and first offered as a high-performance option on the Corvette and GM passenger cars in 1957.
It was the first transverse 2.8 L (2,837 cc) to use multiport fuel injection, and was a High Output ("9-code") engine option for the higher performance A-cars, X-cars, and Pontiac Fiero. This engine produced 140 hp (104 kW) at 5200 rpm and 170 lb⋅ft (230 N⋅m) of torque at 3600 rpm.
General Motors began investigating the use of fuel injection on the Turbo-Air engine on 11 August 1962. [35] A mechanical injection system made by the Marvel Schebler division of BorgWarner was installed on a pre-production 164 cu in (2.7 L) engine. The engine received Bill Thomas 4X1 cylinder heads with larger valves; 1.7 in (43 mm) intake and ...
Low quality diesel fuel was a common problem at the time and most diesels were thus equipped to keep the injector pumps from corroding. Many owners tried to solve this by adding anhydrous alcohol, a common trick to deal with water in fuel, but this instead dissolved fuel pump seals and other parts.
Also the fuel pump boss is still present but undrilled (which dates back to the 1992 model year for production engines without a fuel pump block-off plate - some marine/industrial blocks and crate motors sold over the counter via GM dealerships e.g. Goodwrench, ZZ6, 350 H.O. retain the use of a mechanical fuel pump).
Conversions are popular [citation needed] due to a vast aftermarket and many compatible parts between engine versions. Some conversions are very easy; for instance, the supercharged 4A-GZE engine and electronic fuel injection (EFI) system are a direct plug-and-play conversion into a non-SC AW11 MR2. Even the SC-type wiring harness plugs ...