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Old 07-15-2003, 08:33 PM
Mikey123 Mikey123 is offline
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well to start off with the 4.3L chevy has different rods than any of the other tradishional small block chevys, even including the 3.8s the 305 knock off, they are the same bore and stroke, even the rod length and wrist pin is the same, however the rod journals are not, they are larger in diameter than the rest therefore they will not interchange with the rest, Secondally the diesel usually makes more tork primairly because of its size and because of stuffers ( blowers-turbos)however they suffer from rpm range which limits gear selection favorable to having any power at high speeds without having 20+ gears or highway gears which limit take off , and they are set up that way for a couple of reasons, most heavy trucks need power now not when they can rev up to it , lower rpms mean better mialage,and in order to stand up to high tork loads on the bottom ends they have to be built quite large espically the berings, large and wide diameter berings will keep oil suspention better than small narrow diameter berings will, however the big stuff creates way more friction at higher rpms thus causing bering melt downs sooner in the rpm range. see ya mikey
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