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ridenrace6
 Post subject: crankshaft?
PostPosted: Mon Jul 11, 2011 4:27 am 
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i was looking through the classifieds on samba and saw stroker cranks made out of 4130, 4140, and 4340 and was just wandering if some of those were a "misprint" or not?

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JeffClay
 Post subject: Re: crankshaft?
PostPosted: Mon Jul 11, 2011 9:14 am 
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those are all types of chromoly. Whether or not they actually make cranks out of each kind i can't answer that...
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ridenrace6
 Post subject: Re: crankshaft?
PostPosted: Mon Jul 11, 2011 12:35 pm 
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JeffClay wrote:
those are all types of chromoly. Whether or not they actually make cranks out of each kind i can't answer that...


yeah i forgot to put in the "chromoly", i was just wandering if they really made vw cranks out of that many different materials and if so which one is the best for a crankshaft?

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perrib
 Post subject: Re: crankshaft?
PostPosted: Mon Jul 11, 2011 8:27 pm 
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The "41" denotes 1 percent chromium and 0.2 percent molybdenum. The "30" denotes a carbon content of 0.30 percent. The "43" has 1.65% to 2.0% nickel .5-.08% chromium. 4340 is the strongest due the addition of nickel.
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