re: Cab Over Semi 18 Wheeler's

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I've always loved the sound of those 2 cycle Detroit Diesel engines.

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The 71 Series Detroit Diesels were originally designed and developed pre-WWII to be bus engines.

The six cylinder original variant (6-71) generated around 130 hp which was great for the 1930s.

Manufacturing techniques and technology at the time was primitive compared to modern-day production. The mating surfaces didn’t mate well, leading to those engines being sloppy (leaking inside and outside).

The old saw about 6-71s was that if you put a picture of one on the wall, there would be an oil stain behind it after an hour.

They are still in-use worldwide; if you need 200hp in a third world bunker powered by diesel, there are plenty of worse choices.



The played a big role in WWII, in marine and land-based equipment. They were obviously too heavy to use in aero planes.