75evo wrote:Actually what's the big deal about the rod offset? What if I bought the max speeding non-offset rods and machine the small end so it is as wide as the stock rod small end?
I don't even know the logic behind an offset rod.
I have OEM, Max speed and PPM connecting rods that I have just finished measuring. In brief, the bore centerlines and crankpin centerlines are offset on the V6 motors. The OEM rods are approximately .028" to .032" offset. Alfa made the offset in the big end which would be the best place structurally to do it. The rods are offset opposite for the right bank versus the left cylinder bank.
Aftermarket rod manufacturers seem to always do it in the small end because it is easier to do it there.
The Max speed rods are symmetrical with no offset, the small end width measures .932" which is just a few thousandths less than the OEM at .934" to .936" This difference doesn't matter at all.
The PPM rods have an offset of about .022". The offset is in the small end. The small end width measure just a .001 wider than the above rod.
I wrote Max Speed asking about the lack of offset and they asked if I could send them an OEM rod for them to look at.
I have no idea what Carillo's rods look like.
IMHO the offset doesn't really matter much if at all. Just as long as you don't do like the builder of my motor in my GTV6 race car and install the OEM rods in backwards. Then they are double the offset wrong. (.06" off) The rods small ends were up against the pistons.
Greg