Bull_dog_1989

Okay my brother has a 84 gsl n I pulled the blown 12a out. I baught a 13b out of a 2nd gen rx7. So from everything I've collected on a 12a to 13b swap all I need to do is buy a gsl-se oil pan and front cover. Then what? Will doing this make the 13b sit on the stock 12a motor mounts? Or do I need a different crossmember? I read that id need a 12a to a 13b crossmember. So if I get the crossmemebr will the motor be a direct bolt in with the gls se oil pan and cover? What exactly do I need to do to atleast get the motor mounted in and connected to the 12a trans? I'm not to worried about getting it running yet, I just want the motor (sitting in a garage in dormont pa) to be sitting in my brothers 84 gsl (sitting in butler pa) also, do I have to have a gsl se front cover? Because I still have the bad 12a sitting in butler parting it out or for whole. Can I use the gsl front cover?

84stock

iTrader: (5)

You can use the 12a front cover. You will need a gslse oil pan and oil pickup (you can use the 12a pickup). Search and yee shall find much more!

Most people just slot the bolt holes on the 12a front mount, nice cheap solution.

You will need exhaust and intake, start shopping for a 6 port holley or weber setup. Go with holley and you will have to upgrade the fuel pump.

This 13b will be a nice 50 hp improvement over the stock 12a.

84stock

iTrader: (5)

Unfortunately this unit is sold but this is what you will be looking for.

Man_in_black49464

iTrader: (1)

+1^
Thats just what you need
I agree that the front cover and oil pan with pick up is easy take them from your 12a, you will have to spend money on the intake and Carb setup but you will love it im sure.

84stock

iTrader: (5)

the 12a pan won't fit

Directfreak

iTrader: (2)

Fixed

Bull_dog_1989

Okay sounds good. Do I have to go with a carb setup? I know it will make more power with a carb but I have the ecu n harness for the 13b. Which ecu should I use if I got carb? And am I able to keep it fuel injected instead of carbed? I know that setup is around 1k$ if not a little cheaper. The cars been sitting for over 2 yrs n i'd like to just get it running before we start tryna make bigger numbers. N so when I put the gsl se front cover on, all I have to do is notch the mounts n it will fit? I think racing beat should sell a different front mount bar to bolt on to your 13b to make it a direct fit

Man_in_black49464

iTrader: (1)

thanks directfreak, yes you knew what i meant even if i didnt.
the pick up is used from the 12a and the front cover from it as well i have done this with great sucsess.

Man_in_black49464

iTrader: (1)

1. ecu depends on setup stock or aftermarket needs different ecu for each
2. if you have a carb you dont need a ECU
3. if you put the 12a front cover and gslse pil pan its a drop in motor

Look at this thread it will help you
there is a picture about the notching of engine brace he did it half *** but if you go to a machine shop you can have it done real nice.

https://www.rx7club.com/1st-generation-specific-1979-1985-18/13b-s4-swap-into-my-85-gsl-849136/page2/

Directfreak

iTrader: (2)

Racing Beat Option:

Bull_dog_1989

Thanks for all the advice. I am just going to be running stock for now. So I can use the ecu I have that came with the 13b for stock? And will swapping the 12a front cover be using a distributer for spark? I've never owned or personally looked in a 2nd gen so I'm not to sure. The 13b out in the garage doesn't have a distributer, but there's a spot where it looks like one was? Looks like its a plate screwed onto the top. Thanks again for all the information. I have big plans for my 83 limited edition and my brothers 84 gsl. I love it when I just got done smoking tires n a ford mustang driver drives by gawking at my cloud of smoke in the intersection lol

81WideMariah

iTrader: (8)

you're going to make way more work for yourself than it's going to be worth if you try to use the 2nd gen fuel injection.... first off, it won;t run with a distributor, you have to have the CAS (crank angle sensor).... next you'll need a fuel pump capable of the pressures and flow required for fuel injection.... next you'll need a way to sump the pump or otherwise keep the pump from ingesting air, as your stock GSL pick-up will not work well enough.... then you'll need to upgrade th fuel lines to handle the increased pressure, not to mention the wiring mess you're going to create trying to hook up the ecu and all the sensors that go along with it.

If you're going to go through all that trouble you might as well as swap a T2 into it and have some real fun, but (and don't take this personally) if you're asking basic questions like "Will this engine fit in this car and what do I need to do to make it work?" Then you probably need to get a little more knowledge and experience before attempting it.

Long story short.... get a carb, fuel pump, and header and call it a day.

trochoid

iTrader: (6)

To run fuel injection you're going to have to redo the entire fuel system. Larger fuel lines, (5/16-3/8"), FI rated fuel hose/clamps, 2 external fuel pumps, FI & low pressure and a surge tank, or have the fuel tank modded for an in tank FI pump and a sump cup. I prefer the later because it's a cleaner install and less problematic down the road. I have the parts to mod a couple tanks but no where to work atm.

If you want the 13B to be a straight drop in, swap the engine cradle with one from a GSL-SE. All the front mount bars are the same, it's the cradle/cross member that's different.

If you want to keep it simple, get the Racing Beat S4 6-port side draft UIM and Weber or Dellorto 48 mm side draft carb. This allows you to keep the stock LIM and operating Auxiliary Ports which improves low end performance.

Man_in_black49464

iTrader: (1)

both the fat boys up above this are correct you will spend way more money going ECU and fuel ingection
the carb set up runs around 1000 dollars plus a upgraded fuel pump that could cont 200 or so for a good one.
fuel injection would be cheap if you have the COMPLETE engine from the donor car then some fuel hose and pumps and your good but if you dont have all that then go carb.

Bull_dog_1989

Okay looks like I'm going carbureted. I think I'm just going to buy the racing beat engine brace, I think it would look nice painted. Thanks for all the advice. Will post how the project comes out when we have the time and more money to finish our project. I wish I had a garage, its gettin too cold to do anything with it.

84stock

iTrader: (5)

If you have the right contacts you could fab and adapter out of a aluminum to mount the 12a intake on.

theNeanderthol

iTrader: (1)

Also, check out this little number

http://www.rotary-works.com/mm5/merc...gory_Code=ENGP

Directfreak

iTrader: (2)

According to the website, that part is for an RX-3.

Man_in_black49464

iTrader: (1)

o worked on a rx3 once i would say they are similar to the FB as fas as the engine brace goes but some of the old school guys would know better

81WideMariah

iTrader: (8)

I have a Dellorto DHLA48 for sale in the 1st gen parts section.... You'd be halfway there if you picked it up. I've also got the fuel pump and regulator for that carb for sale as well.

Bull_dog_1989

Im ordering that one

Bull_dog_1989

how much? i cnt find it in the parts section

theNeanderthol

iTrader: (1)

Ooo, be careful. Call rotary-works up first before ordering it.

As Directfreak pointed out, it's made for an rx-3, not an rx-7. So it may or may not fit. I hadn't noticed that when I suggested it to you, but it could very well be a problem.