Dodgy Dick
Active Member
Do 340 Conrods differ from 318 rods?
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YepDo 340 Conrods differ from 318 rods?
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In a nutshell the early rods (273-318) where bushed & lighter rods. The 340 was non bushed (better longevity) & about 100 ghrams heavier. The early rod is what I like in my street builds. The 340 rod is what I'd use for 6500 & up track duty. Along about 72 or so ALL LA's came with the heavier non bushed rod & it became widely known as the 360 rod as the 340 went away. Then the Magnum rod came out 92 & is the best of both worlds. About 25 ghrams lighter that the "lite" 318 early rod yet stronger than the 340-360 rod. Bobs choice from here on. Polish, magnaflux & shot pean the darn things & spin to 7500. And there are plenty of aftermarket rods available. Most pistons can be used with either. I like KB hyperutectic in street builds. Google is your friend. Read writings from actual engine builders. Casting numbers are on the rod.how????