Posted By: astjp2
wrist pin weight? - 02/19/11 11:50 PM
Is 212 grams heavy for 1.031 hemi pins? I am thinking that I might need to get some lighter ones. Tim
wrist pin weight?
Posted By: jvcuda
Re: wrist pin weight? - 02/20/11 01:12 AM
Yes they seem heavy, check with ross pistons.
Posted By: RapidRobert
Re: wrist pin weight? - 02/20/11 01:19 AM
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
Posted By: astjp2
Re: wrist pin weight? - 02/20/11 04:45 AM
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
Thanks Tim
Posted By: RapidRobert
Re: wrist pin weight? - 02/20/11 05:28 AM
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
Posted By: mr_340
Re: wrist pin weight? - 02/20/11 07:52 PM
Posted By: astjp2
Re: wrist pin weight? - 02/21/11 05:37 AM
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