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TPI Specialties was founded by Myron Cottrell, a professional engine builder, who had bought a new Chevrolet Corvette in 1985 and was intrigued by the potential for improvement in its Tuned Port Injection fuel injection system.
Multi-point injection (also called 'port injection') injects fuel into the intake ports just upstream of each cylinder's intake valve, rather than at a central point within an intake manifold. [14] Typically, multi-point injected systems use multiple fuel injectors, [ 15 ] but some systems, such as GM's central port injection system, use tubes ...
The LB9 "Tuned Port Injection 5.0L" was introduced in 1985. At its core was the stout L69 shortblock and it used the same aggressive L69 camshaft profile. The induction system was unlike any system used previously by GM.
The Mercedes-Benz M273 engine is a V8 automobile piston engine family used in the 2000s (decade). It was based on the similar M272 V6 introduced in 2004.. An evolution of the M113 V8, [1] all M273s have aluminium engine blocks, sequential port fuel injection, fracture-split forged steel connecting rods, a one-piece cast crankshaft, and a magnesium intake manifold.
This engine is referred to as the Series I 3800, or 3800 TPI (Tuned Port Injection). In Australia, the LN3 was also replaced by the L27 by Holden who used the engine in their series 2 (1991) VN Commodore range. However, the Australian L27 retained the LN3's one piece upper intake and lower plenum.
Myron Cottrell’s brother, John Cottrell, bought a 1999 Chevrolet Monte Carlo NASCAR Busch Series race car and modified it to make it street legal. In 2006 the car received an appreciative mention from Car Craft Magazine after appearing at the Car Craft Summer Nationals auto show, and in 2006 it was run at Bonneville Speedway on the Bonneville Salt Flats and achieved a best official speed of ...
Also called the 'Big Doggie', the ZR2 is a concept model based on a C4 Corvette, but with a much larger 7.4 L (454 cu in) big block OHV V8 engine with multi-port fuel injection similar to the tuned port injection found on the 1985–1991 base model and a 6-speed manual transmission. [24] [25]
It now features port injection, [clarification needed] larger turbochargers, changes to the valvetrain timing, and a new exhaust system for improved efficiency and emissions. [3] The M279 also uses single overhead camshafts with 3 valves per cylinder , and has an identical bore and stroke compared to before.