35079rx7

I pulled my 12a out of my 79 rx7, but i'm looking at bying a 89 13b will teh 13b match the 12a tranny?

mr_ouija

I think it would, but you can pick up trannies for the 13b for pretty cheap. IIRC $250 should be able to get you a TurboII tranny

35079rx7

so you think i should just buy a new one? the 13b im getting has 89k miles on it...will you check it out and tell me waht ya think??
http://cgi.ebay.com/ebaymotors/1989-...62515203QQrdZ1

mr_ouija

It looks to be in good shape, but without a compression test, you can't really tell. I bought an engine off ebay awhile back, and I got burned. They claimed it ran fine and no smoke. As it turns out, the waterseals were shot... Part of the groove was missing, and another part was broken out. All of the seals on that rotor were stuck bad. You may luck out, just saying that I certainly did not.

The $250 should fetch you a used turboII tranny if you can find one local, it'll hold whatever you plan to get out of the new motor.

35079rx7

do you think this will get my 1st gen running pretty fast?? they say it has 160hp..it looks turboed but i can't really tell?

trochoid

iTrader: (6)

Not turbored, the 12a tranny will bolt up, but you will need a clutch and pp to match the S5. You may need the starter too. What do you plan to do for engine management? You will also need to upgrade the entire fuel system if you are keeping the FI.

mr_ouija

It's the non-turbo motor. 89-91 (s5) N/A had high compression, which makes the 160hp. If it's in as good of shape as he said, then yea, that would work great. I'm always leery of used motors since I got burned on mine. I was lucky however, that I only spent $450 shipped.

It looks like that motor includes the Front Mount Oil Cooler (FMOC) which is a nice upgrade for cars with the beehive. I believe your car already has a FMOC though, so you may be able to sell one of them off to recoup some of the cost.

steve84GS TII

If your going to run an N/A 13B,then the engine and tranny will bolt right up.The clutch splines are the same for all cars from 79-92, except the TII.Youll have to run a 225MM clutch disc to match the 89's flywheel.The 79 had the smaller 215MM disc,but the tranny input splines are the same.

If your going to run a TII 13B engine,then youll have to either mix and match AT rear counterweights and aftermarket N/A light flywheels,run the appropriate 13B N/A flywheel that matches the counterweight of the TII engine,or do the right thing and run a TII tranny.The 12A tranny wont hold up for long behind a turbo engine.

35079rx7

So Im feeling i should find a Turbo II tranny, I have no idea what i'm going to do about engine management.....or fuel system...

mr_ouija

I'm having a bit of luck with my carb on the GSL-SE. Not saying you should go this route, but it's an idea.

bliffle

The 13B transmission has a noticeably taller 5th gear, which makes it better for smooth cruising on the freeway. I have an SE trans mated to the 12A in my 83GS and it's very nice.

35079rx7

yeah i agree mr. ouija carb would be a lot easier.....no ecu
what do you have to do to change it from efi to carb?