Quote:
Originally Posted by patches4392
There is one bearing really close, but would leave the cam clearance too wide I believe. 2.0327 bore, with .0611 wall would leave real close to .010 - too much.
A shop down the road from my machinist wanted $1250 to bore/install 50mm bearings, then add-in the cost (and wait time, barf) of a new cam, probably new push rods (my manton ones are badass and I just bought them). Looking at $2500+ and probably 8-10 weeks, but that comes with re-assurance and probably some added HP, because who can order a cam and not want to improve lol... However, I can't justify that cost when everything is still in good enough shape to reuse.
I think the best bet is to just open the bore up another .003ish and settle in with the 0.010 oversized and hope them not being coated doesn't cause any further issues. I'm hoping this option will save me a couple G's and several weeks because I need my car on the track. Have an 11 round lead in points at 1 track 4 races into the season....
What sucks the most is paying a boatload of cash for a block that wasn't right from the beginning.
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If +.010 cam bearings are available and that will do the job for you, that's exactly what I would do. Lowest cost and least hassle to get you back on track. I have owned a bunch of aftermarket Pontiac blocks with all kinds of defects. Oil gallery drilled into water, clutch crosshaft ball drilled into water, block with no lifter oil feed holes, block cracked at screw in oil plug in the back, cam tunnel problems, rear main seal groove machined wrong. This is to name just a few. Choose the path of least resistance to get it fixed and go racing. Otherwise, it just drives you crazy. All the low production, aftermarket blocks have similar issues, The Rocket Olds block, 4 different versions of the Ford FE blocks, some SBF blocks and many others.