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Machine the 292 block or 312 crank?

Posted By jepito 14 Years Ago
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jepito
Posted 14 Years Ago
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Machine shop called to tell me my 312 block has a sizable crack in the water jacket. I just pulled the engine out of my 56 merc parts car to find it has a 292. This will be a high performance build and crank offset ground to increase stroke. Now the question, am I better off cutting the crank down to 292, or align boring the block to the larger main size? I'm more concerned with doing it the best way rather than the cheap way.
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fairlane bob
Posted 14 Years Ago
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John Thats one of the reasons I said about turning the crank down I kinda remember us talking about turning the cranks and you talking about trouble gitting shops to dress the grinding wheel to properly radius the crank throw,and what I've seen the main bearing and seals seem to be cheaper for 292's than 312's

HOP

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Forum Post Machine the 292 block or 312 crank? By jepito ( 14 Years Ago )
Forum Post I believe you find it's a better idea to turn the 312 crank mains down... By fairlane bob ( 14 Years Ago )
Forum Post [quote][b]fairlane bob (10/31/2011)[/b][hr]I believe you find it's a... By aussiebill ( 14 Years Ago )
Forum Post I'm in the minority here, but I prefer to bore the block to 312 main... By Hoosier Hurricane ( 14 Years Ago )
Forum Post John Thats one of the reasons I said about turning the crank down I... By fairlane bob ( 14 Years Ago )
Forum Post The overlap was my concern with the offset grind and smaller mains.... By jepito ( 14 Years Ago )
Forum Post I have not had one break, but I have found a couple with cracks... By Hoosier Hurricane ( 14 Years Ago )
Forum Post Total agreement with John about the journal radii. Regardless... By Ted ( 14 Years Ago )
Forum Post I too prefer to make the crank fit the block. I am very adamant about... By mctim64 ( 14 Years Ago )
Forum Post Jepito What is your location? I`m in south west Ohio . I should have... By hjh ( 14 Years Ago )
Forum Post Some time back the factories used to roll the radius and undercut it.... By pegleg ( 14 Years Ago )
Forum Post Are there any drawings, sketches or machining diagrams available that... By GREENBIRD56 ( 14 Years Ago )
Forum Post [quote][b]GREENBIRD56 (11/8/2011)[/b][hr]Are there any drawings,... By NoShortcuts ( 14 Years Ago )
Forum Post Do what you think is best (both work well) and in the end you'll be... By grovedawg ( 14 Years Ago )
Forum Post Steve, Call Mummert or Ted. Either guy will be able to sketch it for... By pegleg ( 14 Years Ago )
Forum Post I wouldn't be concerned about the reduction in journal overlap on the... By John Mummert ( 14 Years Ago )
Forum Post Thanx John - that recommended corner radii was one of the basic things... By GREENBIRD56 ( 14 Years Ago )
Forum Post Hoosiers concern, and mine, is the front journal on the blower cars.... By pegleg ( 14 Years Ago )


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