hey i have a 1983 rx7 with a 12a and i was wondering if anyone could help me by telling me if the intake manifold will just bolt on or if i need to make an adapter plate to make it work.i am trying to turbo charg my car and i dont feel like paying for the brass bushings and have all the wiring harness brain box and manifold for a 13B fuel injection system.so please help me and post or send me an email at lifesuksgetoverit@hotmail.com

 

I might know a thing or two.

I used a S5 turbo intake manifold, "ask racing 12a to 13b adaptor", megasquirt ecu. I don't understand your question.

My engine is an 1982 12A NA high compression block

 

i have a stock intake manifold off of a 13B factory turbo RX7 and i was wondering if anyone knows if it will bolt onto my 12A block of if i need to make an adapter plate to make it work.

 

to avoid any farther confushion i feel the need to say that my car is carburated right now and im trying to make it fuel injected.

 

no it will not work...you can custom make an adapter plate to make it work and then from there the rest is up to you...

 

ok cool,ill start working on an adapter plate,thanks bro.

 

can we stop posts like this?, i think if you have to skill to make and adapter from a 13b manifold to a 12a block, you'd understand the concept and differences of the two motors?

 

well i didnt want to have to pull my 12A manifold untill i knew for a fact if i could bolt my 13B manifold on.i have ben working on old school whips for 7 years and i just bought my first RX7 so i dont know much about them.

 

Kick back and relax...

 

There are a lot of things to consider for an EFI turbo swap. If you're concerned about the cost of boost-prepping your carb (I think that's what you're talking about?), then my advice is to think twice about trying this, because it will get expensive fast. So you know, shipping the stock Nikki off to Sterling to have it boost-prepped and getting a carb hat from RotaryShack is probably the easiest and cheapest way to turbo a stock 12A.

That said:
Fuel system will need an overhaul. Surge tank is a must. Tweakit has a nice one. Feed that with a high-volume, low-pressure pump (e.g. Holley Red, Carter) and go to a good EFI pump (e.g. Walbro 255, MSD) and a suitable rising-rate FPR. Don't forget the other EFI-related stuff, such as the appropriate sensors, standalone ECU, and a place to mount the primary injectors.

 

haha, wasn't trying to be an ***, i just think theres plenty of reading you need to do first (all of which you can find on this site) before you take on this task, good luck.

 

well thank you steven for you input and i will make shure to look into all of it.and slate84 im sorry if i seemed rude also,im just new to the rotary thing and trying to get it all figured out,and hopefully end up with a fast *** car.ither way thank you every one who has ben abel to put in any input.

 

Where the hell is clearview?

I would listen to Percent. You are going to spend WAY more making the car FI.

 

As others have indicated, the 13b FI system will not just bolt up to the 12a and run.

An adapter plate to match the 13b manifold to the 12a ports will not work in itself.

To go to fuel injection you will need:

1) a throttle body and manifold. (5% of the problem)
2) Fuel injectors, right sized, right number and a way to mount. (13b manifold will only mount the secondary injectors, the primary are mounted to the ports on the center housing of the engine.)(another 10% of the problem)
3) A stand alone fuel and perhaps ignition controller ( another 15%)
4) Crank angle sensor if ignition is included in the plan. (5% of the problem)
5) complete high pressure fuel system (10% of the problem)
6) engine sensors for input into the controller (5% of the problem)
7) lots and lots of tuning, including knowledge of how to tune. (50% of the problem if you are new to FI)
8) patience. Only the most experienced can install and tune a FI system in a weekend.


What are you trying to achieve? If you like the challenge of converting to FI and want to put the time and effort to learn, great. If you want quick power improvement, at the least cost, go carb.

Much more info - go to www.msefi.com

BTW, welcome to the forum. There is lots and lots of information for you to search for and learn from.

RXDad

 

does any one know how hard it would be to do a full motor and tranny swap from the 12A to a 13B?once agen i am new to the rotary thing and any help is appreciated.im just trying to make sumthing out of an old run down 1st gen that i can put agenst my buddys tricked out 2nd gen. .o and clearview is a town in Washington just out side of Everett.

 

Well I give you credit. I least you didn't post "How can I get 500 Hp 4 the win thx". I don't think the FI is a good idea. Because the 1.1 non turbo only can use so much aspiration. The 4bbl Nikki can already hit redline fast, it's a good carb. Without other mods more aspiration is a waste.

Would make more sense to do a whole 13b if your gonna hassle with the FI. Perhaps sell that one and get a GSL-SE save yourself a boatload of trouble.

 

yeah i have ben looking into getting a 2nd gen,but all the ones in my area are fully modded and people want like 10 grand for them .i dont know what to do right now,im thinking just a 13B swap,that way i have the power of the second gen and i can pull the motor out of a wrecking yard for cheap.

 

there are lots around..just don't wait for it to come to you...if you see your thread in the NW section..took me 1 min to pull up like 6 ads...

 

better yet..here...a 13b...looks like its out of a gsl se...which is a lot easier to swap than a s4..

http://seattle.craigslist.org/see/pts/576625951.html

 

http://www.atkinsrotary.com/store/pr...cat=589&page=1

if you still really wanted a efi kit..i guess atkins has one...

 

^ That's cool, I didn't know Atkins sold sidedraft ITBs. That gives me another option if I ever chose to go that route.

 

In the process of putting a 1984 13B in a 1984 12A chassis.

A lot of it is bolt-in. The wiring harnesses are different enough that it's probably easier to do standalone. MegaSquirt requires remarkably few wires if you are going to use the distributor.

EFI on a 12A would involve making a place for the injectors - primary injectors in all factory EFI engines go into the engine "block" not the intake manifold, so adapting an OEM intake won't help you very much. Or you could hunt down a 12A Turbo. (Easier to find a 13B, or if you're building a 12A, use a '85-earlier fuelie center side housing)

The GSL-SE fuel pump is enormously powerful, and fairly cheap as far as externally mounted fuel pumps go. Get one.