nissan CA18 conrod vs 4G93t conrod

I'm sure that most of GSR 4g93t user wanna know the differences between this two conrods, and what should we do in oder to fit them in your engine. lets have a start with dimension variations.CA18's conrod a little bit beefy compared to GSR

measurements are stated in the picture. Some say that CA18 stroke is few mm shorter than GSR. if you get it installed to 4g93 engine you will get pistons below the deck of your engine block. YES! it's true that CA18 stroke a bit short, but the CONROD actually same in length . the stroke different is due to dimention of crank shaft rotation.

CA18 engine displacement is 1.8cc with 83mm x 83.6mm stroke.

4g93t displacement 1.8cc with 81mm x 89mm stroke

Size of blots and nut also different, CA18 using 14mm and stock GSR using 12mm.

what you have to do before installation?

send all those conrod to machine shop to mill or skim at each side.take a look at the shining portion at the big end. it was reduced about 1mm per side.

next one, ensure to grind the top of end pin to make it fully round as picture belows. this is to make sure it's free from rotation when installed with 4agze piston. u may also make the lubricant hole larger by grainding.