Hey, I know that some of the questions I ask might seem stupid, but as I am 18y.o and don't know a lot about Rotary motors, I need to ask them, so if you all would bare with me that would be awesome.

So I have 3 13b motors. None of them work, and was wondering about rebuilding them? Does anyone have any good tip hints suggestions? Places to get rebuild kits? Costs?

I've read the Mitchel and Haynes manual on my car, and it's got a whopping like half page section on what to do? So that's why I am wondering.

If it's not feesable to attempt a rebuild, is there anyone out there who buy's blown 13b's?

Can anyone inform me on the differences between 13b, 12a, Renisis, and 20b's?

Also, what's with all the abriviations? what do they mean?

Thanks a lot for your help.

Morgan

Rebuilding them is not an easy task if you have never attempted it before. There are varisou videos and such on the market that may assist you in your attempt.

12a, 13b, 20b, ect ect.
Well the numbers basicly represnet the displacement,
eg. 12a 1200cc, 13b 1300cc, ect ect

Rebuilding them is not an easy task if you have never attempted it before. There are varisou videos and such on the market that may assist you in your attempt.

12a, 13b, 20b, ect ect.
Well the numbers basicly represnet the displacement,
eg. 12a 1200cc, 13b 1300cc, ect ect

tsk tsk fdtt, of all people i'd think you'd have known this:

the 12a is a 1.1 liter engine

Okay, so the number before the letter lets me know the displacement, and the number means?

Well this is my recollection (sp?) of each one. I don't own a 7, (Hope to soon tho since my dad has an 8. 12A is the engine code for some earlier RX-7 i believe only one i am unsure about. The 13b is the engine used in more recent RX-7's. It is the base for the 3rd gen which is turbo charged which is known as the 13B-REW Which displace 1.3 L. The 20B was a 3-Rotor Engine which was originally used in the Cosmo (I believe.) Many people transplant this into the 3rd Gen RX-7 fro power obviously. Called the 20B because it displaces 2.0 L. The Renisis is Mazda's Refined Rotary currently in RX-8's. It has 2 Rotors displacing 1.3L putting out 235 or 250 depending which one you have. The main difference between the 13B and the Renisis is that the Ports are on the housing wall rather than the end plates allowing for more exhaust gases to exit easier providing a more emissions efficient Engine. I believe i got most of it. If I messed anything up, please correct me.

tsk tsk fdtt, of all people i'd think you'd have known this:

the 12a is a 1.1 liter engine'

that is true, but saying that to someone and then saying the number indicates displacement just screws everythign up :P

Well this is my recollection (sp?) of each one. I don't own a 7, (Hope to soon tho since my dad has an 8. 12A is the engine code for some earlier RX-7 i believe only one i am unsure about. The 13b is the engine used in more recent RX-7's. It is the base for the 3rd gen which is turbo charged which is known as the 13B-REW Which displace 1.3 L. The 20B was a 3-Rotor Engine which was originally used in the Cosmo (I believe.) Many people transplant this into the 3rd Gen RX-7 fro power obviously. Called the 20B because it displaces 2.0 L. The Renisis is Mazda's Refined Rotary currently in RX-8's. It has 2 Rotors displacing 1.3L putting out 235 or 250 depending which one you have. The main difference between the 13B and the Renisis is that the Ports are on the housing wall rather than the end plates allowing for more exhaust gases to exit easier providing a more emissions efficient Engine. I believe i got most of it. If I messed anything up, please correct me.

13b has been in teh RX-4, FB RX-7 (us only), fc rx7 and fd. renesis is a 13b variation

All these FC FB and other things like that still confuse the hell out of me.

But for the most part I think I finally understand the 12 13 20 part of it.

The letters still are a little confusing but I'll get it sooner or later.

13b has been in teh RX-4, FB RX-7 (us only), fc rx7 and fd. renesis is a 13b variation

Canada and alot of other places for an FB with a 13B in there, its called a GSL-SE.

Awesome, thanks for all the information. Much appreciated.

What's the power rating of a Cosmo?

Canada and alot of other places for an FB with a 13B in there, its called a GSL-SE.

yeah same as the us

well afaik, its north american then?

because those late year 1st gens had 12A turbos in them (japan)

That would make sense as to why some First Gens I've seen have 12A's and 12ATs?