I'm going to use Dampener Plate, Dampner Plate, Damper Plate for search reasons. I did a search and found some info and it appeared that people spelled it differently. Hopefully if somebody else like me is searching in the future this will be helpful.
The early 70's BBC motor is back in the boat and it's time to bolt up the TH400 transmission. The new setup is just like the old setup, a somewhat standard Chevy flywheel (not a flexplate). The current dampener plate is what appears to be a Borg Warner Standard Duty damper plate like the one shown below.
The newly rebuilt motor should be good for around 600/600. At what point do I need to replace the "standard duty" damper plate with a "heavy duty" plate? If the standard duty plate is too weak for my new motor, is the Borg Warner "heavy duty" plate sufficient? If not, what plate do I run?