Originally Posted by Maxwell
you know I think the srt6 might have a stroker crank, now that I think about it. How else would startech easily create the 3.8L upgrade for the NA m112 motor, mecedes bored and stroked the m113 engine to offer 4.3, 5.0 and 5.5 v8's while the m112 is 3.2L stock, they also have a 3.5L version of the m112 in the ML320 and a 3.7L and with piston sleeve kit that brings it up to 3.8L
Interesting point, Max! The difference between the two engines could be as simple as that...
It's possible. It's even more possible that Mercedes makes different diameter crankshafts for the same lower end for all of its M112/M113-based engines.
However, it is more likely that the SRT6 has a
destroked (smaller diameter) crankshaft. This would be done to create the 9.0:1 static compression ratio. Then the SRT6 would have slightly longer rods to compensate.
The thing that confuses me about this is that I haven't seen one specs page that lists the SRT6 and Base Crossfire engines as having different bore/stroke ratios - only static compression ratio! Something is just not right about this info...same bore, same stroke, and same displacement = same diameter piston, same length rod, same diameter crankshaft. No stroke, no destroke.