Posted By: 3_RTs
Which alloy pistons-2618 or 4032? - 09/26/13 06:34 PM
I'm having my 440 rebuilt and it has to go .060" over bore. Stock rods. I would like to use forged pistons, but most or all that I have found so far are made from the 2618 alloy, which is more suited for a racing application. Would 2618 pistons be suitable for the street. It's going to be a 10 to 1 motor using Edelbrock heads,(84cc)chambers, and whiplash cam.
Thanks
Posted By: 80fbody
Re: Which alloy pistons-2618 or 4032? - 09/26/13 07:27 PM
I'd grab another block. See recent post on .060 over pistons. Also, 440's apparently like to split at .060 over. Much better if kept to .030 over. Not what you want to hear I know. Got one under the bench myself. Building a 400 based 451 now.
Posted By: 80fbody
Re: Which alloy pistons-2618 or 4032? - 09/27/13 09:35 PM
Cab's certainly built many motors so I'd go with his recommendations over mine. As for the alloy, I believe that the 2618 is a stronger alloy but higher expanding thus it needs more clearance than the 4032 typically. I think the only concern there might be a slightly noisy piston when cold. Hopefully someone will confirm that for you.