with the 1st gen rx7, im wondering which would be your choice, the 12a, or the 13b, and please have reasons for this.

13B is alwaysl my choics, or a bridgeported 12A.

13b, more aftermarket

13b<13bt :d

sounds like 13b it is, i was planning on it too just wanted to see everyone's opinion.

also what aftermarket companies would you recomend that has a very qide range of parts?

i have the 13bt and i cant complain bout it one F***N bit... it kicks ass, and id suggest...all of the following..ive made a nice list of parts for the future muhself..
rx7.com
racingbeat.com
modacar.com
for diagrams and technical help... iluvmyrx7.com
atkinsrotary.com
mazdatrix.com
mazdaperformance.com


they got whatcha need

12A is the best you get more RPM's

what and the 13b doesnt?

i say 12a simply because i heard a bridgeported firstgen and it was ridiculous.... sideways up and down the road into 3rd gear lol

im not really sure about all this ported stuff, i have no idea what it actually is or anything, but i am interested just because i've heard great things, what kind of money, who does it? and what kind of ported shoiuld i get?

i plan on the car to be drifting/autocross fun car incase that matters.

I'm telling you 12A is the best

Why the hell were 13Bs made then? >_> Whats the difference between the 12A and 13b?

If you know about rotary engine you don't have toask that question

Apparently I dont know enough o.O

What do you have for RX-7 first or second generetion?

12A is 1.1L non turbo 4 port, later jdm ones were turbo (if there were 6 ports let me know)

13B is a family of engines, 1.3L
13B-dei is FC3S turbo engine,
13b-re is cosmo TT
13b-rew is FD3S engine
renesis is side port exhaust 13B
13B was in the RX-4 afaik

You know somethimg I'm from PR if you go there you gonna see the 6 port in the garbage you can get more with the 12A non turbo

yeah i know how you do in PR

but the 13b has established popularity in the US, not to mention the parts interchangeablilty

you cant use 12a stuff with 13b for the most part

Ok in USA but come to PR with your 13b turbo and let see what happen with my '82 12A non turbo

my car cant float across the ocean, sorry

You didn't answer my question Whar do you have for RX-7,first or second generation?

i now have a 1st gen 1981, 12a, 4 port, etc etc, 500$ so not bad i guess, engine runs great, racing beat springs and exhaust, its only got shit paint and a dent in the front fender, so besides get new fender what should i do with this?

i believe that is something to take up with FDTT ... he seems to be the man with the plan

What else do you have in your 12a

thats about it, it has shocks from racing beat but they're not installed, im tihnking bridgeporting it i've heard of adding atleast 50-60hp, and in some cases it'll give 90, so we'll see how that goes i just started another thread asking who does the best bridgeports.

What kind of ignition and coils do you have

LMAO
Well this hole 12A 13B thing is humirous.

The only cars i run with 12A's in them are SA's of FB's thats it.
As for the battle with which is better, well i can get alot more usable power out of a 13B than a 12A. Talk to a rotray engien builder (you are right now) and they will tell you that the 13B has alot more potenital. Albeit untapped potential but its there.
I just finished up a motor for a local companie (wont say names as they dont what it out there) but be put down 312whp on a custom ported 13B NA. He was formerly running a PP 12A in there and the 13B is alreay much better. Track times have improved already.

But throw your personal opinions around all you want 13B's have been proven to have more potential and versitility than 12a's ever have.

thats about it, it has shocks from racing beat but they're not installed, im tihnking bridgeporting it i've heard of adding atleast 50-60hp, and in some cases it'll give 90, so we'll see how that goes i just started another thread asking who does the best bridgeports.

I have a guy running my 12A in his 2nd gen in SCCA racing making 293whp NA. Motor has over 35000kms on it and still going strong. If your intrested in a well put together 12A making good numbers PM me we could work out a deal.

Hey guy You know shit about rotary engine I think that you are american style but here in PR 13b is bullshit,garbage

Hey guy You know shit about rotary engine I think that you are american style but here in PR 13b is bullshit,garbage

LMFAO. Well i supose you knwo what you are talking about seeing as you build up these motors for a living and have produced dozens of 1st place wining rotary powered cars all around the world. As well as built numerious 1 off custom rotary monsters and such.

Ya, you must know a hell of a lot more than me. I mean, what does 20+ years of engenering experance proven. They were stupid to improve over a perfect design that obviously had no flaws.


....

Well enough of my ass talking.
Talk your dribble somewhere else my friend.
12A oil pump cavitation is the demise for alot of local auto-xers, carb backfire on big port cars leads to rebuilds. Fuel starvation due to EXTREME cornering ect ect.
Im Canadian, not american. Nationality has jack all to do with "style". When shit hits the fan the 13b walks away.

O and as for style, this is more along what i do for the local (and some not so local rotary guys)
http://www.350zonline.com/gallery/albums/album589/DSCN1273.jpg
20B tripple turbo (est. power:1300whp)
http://www.350zonline.com/gallery/albums/album589/DSCN1271.jpg
94 FD, streetported, 3mm seals, 225,000kms and still pounding out 418whp.
http://www.350zonline.com/gallery/albums/album589/DSCN1269.jpg
my fun bench
http://www.350zonline.com/gallery/albums/album739/DSCN0877.jpg
Recently completed 95 R2 with full BP, big boost (ext power 650whp @18psi)
http://www.350zonline.com/gallery/albums/album589/laurenFLa.jpg
Oops, not one of my cars, but mine none the less.

Thats my "style" mmmmm k. bye bye den :)

I have a guy running my 12A in his 2nd gen in SCCA racing making 293whp NA. Motor has over 35000kms on it and still going strong. If your intrested in a well put together 12A making good numbers PM me we could work out a deal.
yea this motor has 250000miles on it, and is running amazingly great, i might take you up on that offer for a 12a, but for now i was just looking, expect a pm sometime probably around december and i'll have the budget for it.

i've also heard about turbocharging the 12a, i've heard doing it to the 13b is a pretty bad idea, and i would tihnk the same for the 12a, but have no idea, wondering if you've heard anything successful like that?

In my experance I find it best to leav a NA motor NA and a turbo motor turbo.
Sure you can turbo a NA 12A or 13B but for the cost to do so it woudl be alot easier and chaper to put a turbo motor in there :P

i've also heard about turbocharging the 12a, i've heard doing it to the 13b is a pretty bad idea, and i would tihnk the same for the 12a, but have no idea, wondering if you've heard anything successful like that?


heh then why were the fc's turbocharged and the fd's twin turbo'ed ?
must have been a pretty bad idea on mazda's part huh lol ... hey im just fuckin around i just had to add my commentary... lol

no i know what you mean, but have you noticed it falls apart at about 75000 miles, and the twin turbo's fall apart at about half that from what i've heard, its just that these engines were made for that turbo, so when someone makes one that started na, and makes it turbo, its not meant for it, and will fall apart faster, the rotory just doesn't hold up to turbocharging very well from what i've seen in most cases.

no i know what you mean, but have you noticed it falls apart at about 75000 miles, and the twin turbo's fall apart at about half that from what i've heard, its just that these engines were made for that turbo, so when someone makes one that started na, and makes it turbo, its not meant for it, and will fall apart faster, the rotory just doesn't hold up to turbocharging very well from what i've seen in most cases.


LMAO, you just hear about the ones that fall apart because there owners are idiots. And then comeon forums and such to complain that there engine blew up and the car is crap.
Turboed rotaries are just fine, but turboing a NA motor (higher compression) will lead to blown up stuff. And that is not perticularly good.