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Member 911 Anonymous
Join Date: Sep 2007
Location: Rancho Palos Verdes
Posts: 14,329
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Oh my goodness, you may need to find another machine shop as the one you used is very neglectful.
I used Standard Size because even with 180,000 miles on the Crank Clock and even my Snout damaged. My measurements were still within minimum Porsche Specifications so that is why I chose the standard size. When I micro measured each bearing, I found all of them where a it off, so I matched them. I placed the thicker ones where the journals are more worn than others. I don't think it matters much but I felt much better knowing the wear would be more evenly distributed.
I got this idea when I was waiting for my crank shaft results. A builder, got three sets +.25, Standard & -.25 and mixed and matched. A bit extreme but the engine was used for racing and expected a tear down in short order.
The Rule of Thumb, the thing is if you go too thick, oil pressure will be affected badly where oil may not get in between the bearing and journals. SO please be careful here on your choice.
If 0.130MM is within in spec of wear, use standard, if it is more than standard spec, I would consider finding a better machine shop, and grind it down to accommodate the thicker bearings to do it correctly.
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'85 Carrera Targa
Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace
PCA/POC
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