Anyone using a turned crank?

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Apr 12, 2010 | 11:13 PM

candlelit

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Anyone using a turned crank?

Well I ended up with the wrong crank and now I have to find another, that I can afford, for my engine build. It will be a 9.2CR 365ci Iron Block. I'm wanting to know if any of you are using one, how much is it turned, any problems, and what power/boost levels are you guys at? Thanks

Apr 12, 2010 | 11:43 PM

ninetres

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The one I am running is turned 10/10. No biggie. Info in my sig. Probably at or near 1000whp.

Apr 12, 2010 | 11:54 PM

Whistler

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I don't think it has any effect other than needing thicker bearings.

Apr 13, 2010 | 05:26 PM

candlelit

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k. keep in mind this is cast iron, not forged 4340. anyone else before I purchase one that's turned? thanks everyone

Apr 13, 2010 | 06:04 PM

BadgeZ28

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Most used cranks are turned 10/10 to clean and true up journals. The loss of strength is very small. I have seen 900 HP mentioned as a limit for stock nodular iron LS cranks. There are methods to harden the surface of the journals after the grind. I think one is called pachardizing?

Apr 14, 2010 | 03:43 PM

gnx7

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.010 is something like the thickness of a piece of paper or a hair. I wouldn't trip on it.

Apr 15, 2010 | 11:16 PM

candlelit

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thanks guys.

my new problem is the crank I'm buying the guy doesn't know how much it was turned. will the machine shop be able to tell so I can order the right sized bearings?

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Apr 16, 2010 | 12:10 AM

black98ws6ta

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I'd just buy a standard one, they can be found easily.

Apr 16, 2010 | 05:32 PM

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candlelit

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well the guy told me "it was turned about the minimum you can go, and still use factory bearings." either way, with it being turned & polished and the deal I'm getting will be worth buying it, even if the shop has to mic it. thanks everyone!