Posted by MarkB_MI on February 27, 2019 at 15:23:20 from (174.230.25.26):
In Reply to: Re: GMC Twin Six V12 posted by buickanddeere on February 27, 2019 at 10:06:46:
> Here is the 2020 solution for light and medium duty applications . Without the cost and aggravation of a Tier IV diesel . It would even make 115-140HP at 1800rpm for industrial duty.
I don't think so. The 60-degree GMC V-6 and V-12 engines are a product of 1950's engineering. They had a good run, but no way will they be coming back anytime soon, even if the price of gasoline drops to pre-OPEC levels.
These engines are too heavy and too expensive to build to be competitive in the 21st century. It might be possible to improve on their high fuel consumption with electronic fuel injection, higher compression and better combustion chamber design. But how can you shave enough weight to make them competitive with a modern turbo-diesel like a Duramax? The V-12 weighs over 1200 lbs! And it's expensive to machine 60-degree engines, which is why nobody makes them. So it would cost as much as a Duramax, weigh more and probably produce less power while burning more fuel. On the plus side, with regular oil changes a modernized Jimmy should last pretty much forever.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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