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Crankshaft ID
Can someone help me identify this crankshaft please? An acquaintance owns it and I was thinking of taking it off his hands if it’s what I need...he thinks it’s a 2.2 crank, it’s obviously a counterweighted one. But that’s all I know. Journals have some rust spots so I don’t know if it’s worth messing with, but anyway I’d like to at least ID it.
Here’s a couple photos. Sorry for the poor quality, and I didn’t snap a pic of the whole crank. But he lives close so if I need to I can: ![]() ![]() |
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Probably a 2,2 crank. Mic the journals. That will tell you everything you need to know.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,467
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2.2 all journals are the same size. Yes he drill holes for rod oil are the same. Size as plugs
2.4 the rod throws are smaller. The drill holes for the rods are larger than the plugs Bruce |
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Ok, thanks for the info guys.
So, the question as to weather or not this crank is worth fixing...if it needs both the mains and rod journals ground undersized....is this a good idea? I’ve read various viewpoints here and there on this. If I remember correctly, I read that one of the problems with an undersized crank is that the corresponding oversized bearings needed are prohibitively expensive? |
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Join Date: Oct 2008
Location: Nash County, NC.
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Check the price and availability of the bearings you will need
It might be less to have the crank fixed than cut Bruce |
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Bruce, can you explain what you mean by having the crank fixed or cut?
For clarification on my end, I have a 2.2T motor, that when I do the rebuild I was planning to use a CW crank such as this one instead of my non-CW one. |
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Quote:
However, if you plan on spending most of your time above 6000 RPM the fully counter weighted shaft is the way to go.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,467
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There is a few people in the country who repair cranks to standard/std
Bruce |
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Ok I understand. No doubt a more expensive process than simply grinding and polishing undersized.
Trackrash thanks for your comments....I have also heard this before, that there is some affinity for the T crank. And no, I’m not planning to spend much time above 6k...the plan is just a nice little street motor. |
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,467
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The fix
May be less than the price and availability of the bearings Bruce |
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