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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,580
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The rods get oiled via holes drilled diagonally through the crank from the main bearings to the rod bearings, so they are further downstream and get less oil flow than the mains (ignoring the centrifugal pressure effect). Therefore, if the rods didn't suffer from lack of oil or poor oil, then it's even less likely the mains suffered either.
NOTE: several people here have measured NEW Glyco bearings out of tolerance, and with poor design. That's why I say to reuse your rod and main bearing shells if they measure out. Plastigage is not the way Porsche does it or specifies it, but IMO it's plenty good enough to check that they aren't out of tolerance. If you are building a serious race engine that will see 8000 RPM+ and you want .0025"-.0027" main clearance (2 ten thousandths), use the expensive measuring tools (and know how to use them). If you are building a street engine, and you are satisfied with .002-.0025" clearance (which is well within Porsche specs), then Plastigage is good enough.
Use the Plastigage on the rods. use the old rod bolts to torque them to spec, and then check the Plastigage squish. On the mains, bolt it together (you only need to do the case through bolts), then show us what you got.
Cost having a shop measure the case and crank/rods: I have no idea. Let's see if anyone else jumps in.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
Last edited by PeteKz; 01-25-2024 at 03:48 PM..
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