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wrist pin weight? #932533
02/19/11 07:50 PM
02/19/11 07:50 PM
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Utah and Alaska
astjp2 Offline OP
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Is 212 grams heavy for 1.031 hemi pins? I am thinking that I might need to get some lighter ones. Tim

Re: wrist pin weight? [Re: astjp2] #932534
02/19/11 09:12 PM
02/19/11 09:12 PM
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upstate, New York
jvcuda Offline
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Yes they seem heavy, check with ross pistons.

Re: wrist pin weight? [Re: astjp2] #932535
02/19/11 09:19 PM
02/19/11 09:19 PM
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Lincoln Nebraska
RapidRobert Offline
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well I just weighed the one in my KB 280 (451) pistons (1.09") on my ten dollar Harbor freight scale & it is 191 grams EDIT .742" ID, 3" long, ~.172" wall thickness

Last edited by RapidRobert; 02/19/11 09:50 PM.

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Re: wrist pin weight? [Re: RapidRobert] #932536
02/20/11 12:45 AM
02/20/11 12:45 AM
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Utah and Alaska
astjp2 Offline OP
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What about using a tapered ferrea pin P70040-8, supposed to be 128 grams...trying to prevent adding mallory metal to the crank. Thanks Tim

Re: wrist pin weight? [Re: astjp2] #932537
02/20/11 01:28 AM
02/20/11 01:28 AM
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Lincoln Nebraska
RapidRobert Offline
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Not sure how much you could (safely) take off the smaller Hemi pin dia but you can shorten BB (1.09") pins 1/4" off each end & still (safely) maintain enough pin/piston contact area & will lighten it (these I have) from 191 to 159 grams if you have access to a lathe or if it would be cost effective for you to pay that shop time. Pressed fit of course


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Re: wrist pin weight? [Re: RapidRobert] #932538
02/20/11 03:52 PM
02/20/11 03:52 PM
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Re: wrist pin weight? [Re: RapidRobert] #932539
02/21/11 01:37 AM
02/21/11 01:37 AM
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Utah and Alaska
astjp2 Offline OP
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These are floating pins, so I don't think narrowing them will help much. Thanks for the idea though. Tim

Quote:

Not sure how much you could (safely) take off the smaller Hemi pin dia but you can shorten BB (1.09") pins 1/4" off each end & still (safely) maintain enough pin/piston contact area & will lighten it (these I have) from 191 to 159 grams if you have access to a lathe or if it would be cost effective for you to pay that shop time. Pressed fit of course









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