12a are cheaper to rebuild and to me are alot more reiable than a 13b...and in my area alot more common..depends what you want to do with it..and just cause its a 12a ...you can still have a swap for another 12a (12at)

IF you want info on any Rx related click on the link to my page.I have a link to a page that shows the cost and wiring needed to go from 12a to 13bt.I swaped my 12a for a 13b you'll need the engine and front crossmember.Try for a 84, 85 13b 6-port they bolt up to 84,85 GSL-SE crossmember.Then from there you have to decide on EFI swap or Carb the 13b.Mine was easy after I droped in the crossmember and engine out of this wreck 84 GSL-SE I found at a wrecker.Carbing it is just so easy no wiring to worry about.If I sell this one anytime I know a guy who has a '89 Rx7 I might consider seeing as the engine is blown on it. https://www.nopistons.com/forums/pub...#>/biggrin.png That is IF I ever sold this one.13b NA swaps are easy. :bigthumg:

Hey all, in my neck of the woods, the 12a turbo is a popular swap[fairly cheap and the 'powers that be' will only approve 12a turbo's in gen ones. Mine sports a bridgeported 13b which is fun enough. There's a couple floating around here with a 20b in the bay!! That should add enough HP to make it fun. I'd agree with Racerx, the 13b na swap is fast and easy over here as well. I know you guys seem to have harsher emission rules so just check on that, it may become a factor.

IF you want power you can always go all out and swap a 13b-re or 13b-rew those pack a punch on a light first gen. https://www.nopistons.com/forums/pub...#>/biggrin.png

http://www.geocities.com/chris32472/index.html



http://www.turbofb.com/



http://www.rx7club.com/forum/showthread.ph...&threadid=65800

I've posted the top 2 links all over this board already.That geocities page is awesome.

missed it



and yes, it is