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Regarding adding a turbo to a naturally aspirated diesel, do you need to freshen up the crank bearings first? I'd always heard that was suggested on a gasoline engine but unsure about diesel.
Also, I understand the VW 1.6NA has a different piston. Something about an oiler passage or something. Not sure, but I love mine in my '82 Rabbit 5-speed.
My first vehicle, bought in '74, was a Ford van. When gas prices went up in the late '70s during the second OPEC crisis, I started looking into fuel efficiency mods. Everything was (and still is) based on a 36 month return of investment.
One thing my father suggested was a streamlined belly pan. There's lots of open space under a van. My thought was to use Dacron like on an airplane. Light weight, pretty durable.
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