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Re: Connecting Rod Stampings? Posted by 900 Aero [Email] (#425) [Profile/Gallery] (more from 900 Aero) on Sun, 13 Jun 2010 12:29:17 In Reply to: Connecting Rod Stampings?, Agent9, Sat, 12 Jun 2010 21:33:33 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I usually find those numbers on pistons rather that rods so I got out what B235 rods I have and the only numbers were 1,2,3, & 4. Actually new bearings are a concern because manufacturers tend to make their rod large end bearing housing bores and crank journals small spec. minus a couple tenths of a thousands and make up the difference with slightly thicker standard bearing shells. Anyway make sure to torque the bearings in place and measure your vertical oil clearance, should be just under to just over .002". If your set of forged pistons are standard be sure to carefully check the skirt clearance to make sure you don't have too much clearance. Also make sure not to use a gap-less second ring as it won't let the pressure that builds up between the top and second ring escape fast enough to prevent ring flutter. Ideally you need the second ring to have the same or a tiny bit more gap than the top ring! Also make sure your top rings are a ductile material that will stand up to a turbocharged engine's combustion chamber temps. You can easily tell by how much more tension a ductile ring has the what the second ring has.
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