Re: Dual intake for thunderbolt

Posted by Anthony Pallett On 2013/4/8 12:45:17

David you have your rod lengths backwards the 288 had a shorter stroke with a longer rod the 327 had a longer stroke with a shorter rod they used the different rod length to enable the use of the same piston. So with the use of a custom piston with the proper pin height and the longer rod on a 327 you get a Better rod stroke ratio. Its the same basic concept as going from a 5.7 rod to a 6.0 rod in a small block Chevy. the science can get a bit in depth but the longer rod makes the piston dwell a bit longer at TDC and the rod itself doesn't whip around as much. Its a minor improvement at the power levels and RPMs the L8 Packard will be at but the way I look at it every bit helps.