what does FB, FC, FD stand for



and



how can i tell which is which



thanks

They don't stand for anything. It's just a couple letters in the VIN. For example, the VIN of the '81-'85 1st gen RX-7 starts with JM1FB33. The '79 to '80 RX-7 starts with SA22C, but that's only in the USA. Everywhere else has SA22C from '79 - '85. Confused yet? https://www.nopistons.com/forums/pub...IR#>/smile.gif



I let someone else explain why the 2nd and 3rd gens use FC and FD respectively, and why there is some confusion between FC3S or FC33 and FB33.

generally...



SA and FB look like this:

https://project.r.tripod.com/sitebui...res/sa-001.jpg



FC like this:

http://www.riskin.org/rx7/fc/10th_brochure.gif



FD like this:

https://upload.wikimedia.org/wikiped...da-RX-7-FD.jpg



Of course there's a whole bunch of nitty-gritty involved, but it sounds like you were just looking for the basics.

all FD's were red... atleast it seems that way.

******* tripod