[Dragncar]

Do not put any shims under your main caps !

[tekuhn]

Originally Posted by Dragncar

Do not put any shims under your main caps !

Nope. I will pursue the oversized bearing solution.

[mgarblik]

It seems that new crankshafts are being ground right at the high limit more and more these last couple years. The extra clearance bearings are the easiest solution if you can get them. We had a 440 crankshaft in class we just couldn't get extra clearance bearings for. It had .0008"-.0012" clearance on the mains. We had to send the crankshaft to Shaftech in Fostoria, OH to have it ground .0015". It came back very nice. But a 6 week wait and not very many shops can remove such a small amount of material properly. You really have to know what your doing to make that happen. The average crankshaft grinder and operator would probably turn the crank into scrap.

[tekuhn]

Originally Posted by mgarblik

You really have to know what you’re doing to make that happen. The average crankshaft grinder and operator would probably turn the crank into scrap.

That’s my fear. I do not have any experience with the local machine shops and hate the thought of letting any of them touch it. If a .001 oversize bearing will get me to .0025 clearance, I can live with than on a street motor.