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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