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Original Message
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| Crankshaft and valvetrain |
| By ANDY - 02/07/2001 5:29:53 PM; IP 203.56.239.116 |
Thought id share a crankshaft tip. When I stripped my 390 my crank was already 20/20. Not wanting to go 30/30 I looked for another crank, luckily my mate had two, both std/std. One of these had your typical Ford part numbers on it ie. C5AE-B (just a guess icant remember) the other did not have much on it at all (its in the motor now and I didnt write down what was on it but it wasnt your usual ford part no.) Anyway I had decided to use the one with the Ford id but then noticed the location of the hollows in the rod journals. There had obviously been some core shift during casting and the hollow had shifted very close to the surface of the journal. I reckon there was about .080" thickness on some rod journals! The other crank was fine with nice thick walls. Watch out for this as I am sure it would have grenaded at high rpm (probably alright for grandma).
I am reading here so much about rocker / shaft / stand problems. You guys are scaring me. I run standard aluminium stands, new but standard style sealed power shafts and rockers with sring spacers. Edelbrock heads (cant remember the spring pressures, 120seat maybe?) and a lunati solid with around .580" lift. Always sees 6000rpm with occasional 6500's.
Its been together for 3 years. Am i just lucky?
ANDY |
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