[pwd72s]

Chuck Stoddard, writing for PORSCHE PANORAMA, January 1972 issue; article title: THe 2.4 engine for '72
"At this point, the eager PCAer probably has thoughts about stroking his '71 crankshaft, buying some '72 rods, and this create a low cost high compression "hotrod". Assuming one tried this with a 911-E or a 911S crankshaft, the first problem is that because the crank journals are progressively depth hardened, (hardest on the wearing surface) it would be nearly impossible to accurately regrind them eccentrically, and then re-heatreat to restore proper hardness, etc. THere would also be an increase in compression ratio due to the increase of stroke. (Formula given edited out here) By applying the known values from the '71 engine ...it is easy to predict the R (compression ratio) for the hotrod which turns out to be over 10/1. THis is a bit much for longevity and highway use. HOwever, it is physically possible to install a '72 crank, rods, and pistons and cylinders in a '71 engine, but then the fuel injection pump will not to the displacement. Changes to the fuel metering system are not easily accomplished, or recommended."

So, there..in a free time warp, Chuck Stoddard's thoughts..