In the United States, the EZ30 was introduced in the Outback H6-3.0 in November 2000 for the 2001 model year. Īt the time, the EG33 was the largest naturally-aspirated engine that Subaru had ever made for regular production in the 1990s, Subaru branded the Subaru 1235, a 3.5 L flat-12 engine designed by Carlo Chiti and Motori Moderni, intended for Formula 1 racing, although Christian von Koenigsegg reportedly was later interested in the engine for his supercar. The EG33 used a single toothed timing belt which drove the exhaust camshafts on each bank in addition to the water pump (mounted on the right bank) the intake camshaft on each cylinder bank was driven in turn by a set of helical gears via the belt-driven exhaust camshaft. Unlike the SOHC EJ22 it shared some dimensions with, the EG33 featured dual overhead cams both engines used four valves per cylinder. Īfter the SVX was discontinued, Subaru did not offer a six-cylinder engine until the EZ30 was developed and released for the Subaru Outback. The EG33 was exclusively fitted to the Alcyone SVX, where it was paired with the 4EAT automatic transmission in both front- and all-wheel-drive configurations. Similar to how the six-cylinder ER27 is related to the earlier four-cylinder EA82, the EG33 shared bore and stroke dimensions with the contemporary four-cylinder EJ22. īoth JDM and USDM versions of the ER27 used multi-point electronic fuel injection. The valve timing system is belt-drive using two individual timing belts, curiously one belt uses a spring tensioner (like the EA82) whilst the other uses a hydraulic tensioner (like the EJ22). The upper intake manifold then bolts to the lower section and is unlike the EA82 or EJ22 "spider" manifold designs in that there is no central plenum chamber. The intake manifold uses a two piece design with a lower section bolting to the heads containing the coolant bridge, injectors and various vacuum lines. For instance, the oil and water pumps are unique to the ER27, sharing similar bolt patterns and design to the EA82, but being of a higher flow in both cases. While recognised as bearing many similarities to the Subaru EA82 engine, there are numerous differences in design between the two engines and a large portion of parts are unique to the ER27. Like the EA series engines, the ER27 engine featured 2-valve cylinder heads with hydraulic lash adjusters and the ER27 and EA engines shared the same bore, stroke, and spacing. The ER27 designation was the first time Subaru incorporated the engine's displacement into the engine designation and all subsequent engine codes have retained this nomenclature. When the ER27 was introduced, it was the only water-cooled flat-6 automobile engine on the market. Remember anything is possible just depends what budget you have.Reciprocating internal combustion engine Subaru ER27Ĭreated as a refined luxury engine with improved power over the EA82T, Subaru introduced the ER27 engine in November 1985 for the Subaru ACX-II concept car, shown at the Tokyo Motor Show and billed as the 'concept car of the near future.' The concept went into production as the Subaru Alcyone VX (Subaru XT6 in North America) in August 1987, the exclusive application for the ER27. May I suggest contacting they do nice little catalogue you can order, and it includes all sorts of engine dimension stuff.Īpart from car engine, perhaps a large tuned bike engine these are very small very light with integral gearboxes and will put out over 200bhp at times. You can get remote electric water pumps too which would help. Realocate the alternator, and get side draught induction system which would reduce the height to less than 500mm. The current watercooled flat 6's in the Boxster may be ok as Porsche often fit dry sumps to their cars to be able to fit the engine lower.Īpart from that the Mazda rotary is VERY small, I looked at one and the block was about 13" in diameter and although the ancillaries are on top of the engine you can Porsche lumps normally have the aircooled fan housing making them tallish, though you can get horizontal fan conversion which are low. That would leave you the alternator as the highest point, but there is a motorsports trick to mount it above the gearbox and drive it from a pulley via the driveshaft outputs. If you were prepared to build a new inlet manifold you could probably use 4 small motorcyle throttle bodies instead of the Subaru manifold and lose some height. Most of the flat 4,or 6 engines can be made lower if you are prepared to custom build ancillary components.Į.G for the Subaru you can buy shallower sumps from Australia and lose some height there (or maybe dry sump). Engine wise it would depend on how theoretical or practical your project is.
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