I have a 427 crank that is offset ground for 2.10 rods. Still need to have the mains and counter weights turned down to fit the 409.
That is more or less what I was thinking. As much as I like "lighter" stuff, the pin size issue and overall strength with relatively heavy 409 style pistons would probably convince me not to do it.At 7000 rpm, the reduction in mean bearing speed for the rod bearing going from 2.2” to 2.1” is less than 5 percent. Doesn’t seem worth anything. I guess the rod would be lighter which certainly doesn’t hurt but with the heavy 409 piston I would prefer the extra strength of the larger pin and rod.
True. Now consider this a 4.600 bore 14:1 for a 4.25 stroke and 6.385 rod is still lighter than my 4.370 bore 13.5:1 4" stroke and 6.385 rod pistons with pocket milling and under crown profiling. And pro stock guys only care about making it through the weekend instead of 300 runs.Those pro stock guys are using Honda size rod journals. Now they do have a lighter piston.
Did some work on a couple of Hemis. One with stage 5 heads and one with Millenium heads which does use a flatter dome. Both over 14:1. They were still lighter!Everyone has a lighter piston....well maybe the old hemi guys???
Pro: Faster acceleration and less stress on everythingThat would probably be a good option rather than an actual sbc rod. Another interesting topic is to get piston guys talking about the pros and cons of light wrist pins.