uber95 wrote:Sure they are, as in 10 over, 10 under etc. What he means is putting a mic on EACH INDIVIDUAL bearing, or specing out each individual piece part, Think of taking a pack of say 20 conrod bearings and going through each pack and only using the ones that spec out within say .001 of each other. That's what he's talking about, ultra precise rebuilding.
Have you rebuilt an RB before? or any nissan engine for that matter. THEY ARE GRADED. Grades (aka measurements) are stamped on the block crank rods and pistons. There isn't ONE standard bearing size. IE: Nissan doesn't use one bearing size for all the crank, mains, rods, and they don't use one piston size.. They use multiple bearing sizes and multiple pistons sizes. If the engine wasn't blueprinted how could they grade each?
It doesn't matter if it's not precision down to .001" Nissan still "blue-printed" them. They just don't stuff pistons and rods into each block.
And FYI Nissan does down to .0005" on some graded parts. And's that is way more precise than you or most machine shops can duplicate. Tempurature will affect measurments down at that level.
Yes I have rebuilt RB's and yes I did mic them myself down to .001"
Modified by eh? at 5:53 PM 10/29/2007