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1991 BMW M8 prototype outlined in all its glory

Earlier than the present BMW M8, the automaker toyed with constructing an M model of the wedge-shaped E31 8-Collection of the Nineteen Nineties, even constructing a one-off prototype. That automobile lately resurfaced in a video from BMW Group Basic, together with interviews with among the engineers who developed it.

The E31 M8 prototype has a model of the S70 6.0-liter V-12 used within the then-new 850i coupe. This engine developed 550 hp, and was fed by a large consumption duct designed to maintain incoming air as cool as potential. It additionally wanted extra throttle valves to decrease idle velocity, which might have been 2,000 rpm to three,000 rpm with out them, an engineer stated. It was an actual bear to get this automobile to drive slowly.

Within the curiosity of retaining weight again and low, the automobile additionally has a dry-sump lubrication system, with the oil reservoir within the trunk as a result of there wasn’t sufficient room below the hood. Oil is fed to the engine via strains within the roof, and the move could be heard from contained in the automobile, one the engineers stated.

BMW M8 (E31) prototype

Whereas BMW selected to not construct the M8, it inexperienced lighted the tamer 850CSi, with a 5.6-liter V-12 making 375 hp. A manufacturing M8 would not arrive till the present G15-generation 8-Collection. Obtainable as a coupe, convertible, or four-door Gran Coupe, the G15 M8 makes use of the S63 4.4-liter twin-turbo V-8, which makes 617 hp in Competitors fashions.

The prototype M8’s V-12 did not go to waste, although. A model of it was later used within the McLaren F1, and one more evolution was used within the Le Mans-winning BMW V12 LMR prototype racer. BMW even stuffed the Le Mans-spec V-12 into an X5 SUV.

The unique M8 prototype was thought to have been destroyed, however was revealed to nonetheless be in existence in 2010, and was subsequently restored by BMW. After sitting for 3 many years, the liner of the racing-style gasoline cell had disintegrated, however the automobile is now in working situation. Try the video to listen to it hearth up and be taught extra in regards to the automobile. Maybe we’ll see it in movement in a future video.

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