I was referencing the motor specs for honda motors (here). I did searching here, but didn't find much.

It says that the b18c cranks all have a .858" rod bearing width, and the other cranks all have a .935" rod bearing width. I know obviously a bigger rod bore is better, but what about width? I'm talking about oiling for heavy power loads under boost, not necessarily for high-rpm. Boosted motors have to deal with possible knock/preignition much more so than NA motors, as well as heavier torque loads. Am I to assume that they may have reduced the b18c motor's rod widths due to the extra rotating mass doing more rpm's relative to the other motors, because of the oil squirters reducing oil pressure, a higher capacity oil pump, or because it's the latest b-series and they found they didn't need the extra width?

What I want to stress is that I'm not worrying about R/S or redline, just curious about oiling. Built/tuned motors tend to deal with the obvious problems, and few things are done by most to aid oiling. Since I'm looking at it from a boosted motor standpoint, it would seem the wider crank area can't loose - no need for high rpm's to make power, more daily-driving low torque, wider oiling surface to widthstand more abuse.


If it's just some strange typo or the bearings are the same width just wider rods, then forget I said anything.

 

Doesn't anybody read this forum section? Or doesn't anyone give two ***** about engine lubrication?

I think those new oil comercials are getting to you all!

 

I heard about using RSX mains in Bseries. Don't know about rod bearings though. It was on here probably in forced induction, they break more engines than the All motor people. check there.