I am looking for these dimension from the flywheel 13-b RX-7 if someone
have one on hand uninstalled i would really appreciate those informations
see photo
 Jean Prudhomme
Which dimensions? hole spacing? Diameter? Hole size? How exact do you
  need... I happen to have one off the plane right now :-)
  -- David Leonard
  Dave you are insured. Sky Smith had the info on you. You are famous.
  As far as I can tell you can fly the RV4 anytime.
  Apparently two successful off airports counts for a lot :)
  I need a medical and and bi annual. Both have recently expired. I got them for
  flying in Oz.
Paul Lamar
Hi David i will need all holes diameter and holes circle so i can compare with
  the RX_8 flywheelThank's for your assistance
Jean Prudhomme
Jean, I received the damper plate today. All is well. Thanks.
  If someone hasn't already given them to you, I picked up my RX-7 flex plate from
  the hangar today. I will measure it tomorrow if you still need them.
  C. Smith
    
C. Smith Thank's for your response of received the damper plate,yes i still need
the holes dimensions on the RX-7 flywheel just to compare if both are
interchangeable, but i found an idea to use the RX-8 flywheel and the standard
Tracy damper but Paul recommend 4130 instead of aluminum plate but it will add a
few pounds, you see the rx8 one  is design differently then the rx7 with those
big holes away of center holes and closed to the ring gear and by using a bolted
plate to the original holes 12mm the Tracy damper plate by attaching the rubber
bushing holes and are line up with the rx8 big holes for the bolts head
clearance.There is a sketch for this additional plate no welding and no
balancing i guess it worth to try.


Jean Prudhomme


Paul I check the material thickness of the RX-8 flexplate and it is at .085" thick you mention the rx-7 is .o59" it is a big difference between both

Jean Prudhomme

The best part about it is it does not have any holes to start stress cracks.
However it does not fit Tracy's damper plate.

Paul Lamar