There are lots of differences in the two motors. The Viper has a different
size cam bearing at the oil pump drive. It also has a much more aggressive
cam profile designed towards horsepower. I know I am going to get the answer
of "Look at the torque though!" Well, look at the displacement also. If
displacement did not equal torque, then how come the large deisel engines (in
freightliners, mack, etc..) are massive, some even around 900 cubes, and a
six cylinder to boot! The block is another difference, the first generation
Vipers did have iron blocks, I believe, but now they are aluminum. The oil
galleies also have a different diameter, with the trucks being larger and the
Viper's being smaller to get more oil on the crank bearings since they expect
them to be turned to higher rpms. The compression on the two is also
different. There is also a difference on the size of the main bearing caps.
Overall, they are two totally diferent motors, internally and externally.
Even the intake and exhaust manifolds are different. The trucks intake
manifolds are set up for a central throttle body while the viper has dual
throttle bodies attached to what amounts to a cross ram intake. The exhaust
on the trucks exits to the rear while the ones on the viper are equal length
center exit style. There are probably even more differences, but that is all
that I can remember from the motor swap that we did on a friends Ram.
Will
96 Cylindrically Challenged (Anemic my a**!!!) V-6
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