84gs_rx

hey guys sorry to bring up the age old question but all the info im finding on the swap is for SE's and GSL-SE's. I bought another 12a to rebuild and put in my car, but for the price of the rebuild kit $960 from ATKINS i could spend a bit more and get a TII motor. Who knows what the 12a housings are going to be like once I crack the motor open. Plus i would want to turbo the car down the road anyway.

What would I need to complete the TII swap into a 84GS???

the RB 13b to 12a front motor mount bracket says it allows 74-85 13b's to mount but what about S5's??? The motor will come with the ECU, tranny, uncut harness.

I know that i would need to get a GSL-SE fuel tank and a S5 fuel pump and the S5 ignition system but am hazy on that and many other details, please help thanks

84gs_rx

also how would the tranny line up??? i know that i would need a new drive line but would the tranny and shifter end up mating where the 12a's would?

thunkrd

iTrader: (1)

you would have to obtain a gsl se front cover and oil pan etc. i believe s4 would be easier

thunkrd

iTrader: (1)

the main problem is the mounting location. 85 and older engines were mounted at the front. later engines had mounts on sides. some people have welded in some pretty decent side mounts... but i am not sure about how well they work.

supposedly the s5 uses a lot of electronic devices that don't work as well if you change the front cover, primarily omp. i'm not sure about other things.

i think you have to shorten the shifter arm a little. shifter shouldn't be too big of a deal

82transam

iTrader: (18)

The S4 is definatly an easier swap, the S5 has an electronic OMP that needs to be retained if you are going to use the stock ECU. It does not bolt up to an SE front cover (which is needed if you plan to keep the FB style engine mounting system) Alot of guys will keep the S5's omp plugged in but tied to the side (inoperative) and simply premix, a few others have modded the SE front cover to work with the S5 omp.
The shifter needs to be moved 30mm forward, this is simply done by using the FB tranny's shifter tower and modding the T2 shift rod. The trans mount itself is also custom, not too diffucult.
The engine harness is plug and play, but you must fabricate a harness to power the coils, fuel pump resistor, main relay, circuit opening relay, and (optional but recommended) FC fuseblock (the one on the strut tower), along with any and all test connectors the FC has.
A few other things to keep in mind would be the nessesity of a front mount i/c since the top mount sucks and there is no scoop in a FB hood to work with it, and a larger than stock, custom exhaust.
As for the fuel system you can use a SE tank or modify a FB tank to use an in-tank FC fuel pump, if you can weld this is not hard and overall a much cleaner installation.
Hope that gets you started, let me know if you have further questions.

84gs_rx

ahh S5 doesn't sound fun, lets go down the S4 route instead what would that entail???? that would be different why would it be easier? and thank you very much for your help guys i appriciate it alot.

82transam

iTrader: (18)

Agreed the S5 is more work if you plan to keep the stock ECU like I did. The S4 still requires the same mods to the shifter and trans mount, but since it uses a mechanical omp like first gens all you need is a GSL-SE front cover and oil pan along with the RB enging mount to actualy put the engine in the car. Another option if you want to not buy the RB engine mount is to slot the motor mount holes 20mm to accomodate the longer 13b.
The wiring and plumbing is basically the same as the S5 with a few small differences (the crank angles sensor is part of the S5's engine harness, where on the S4 is part of the body harness so you'll have to include that in your custom harness etc)
The fb speedo cable will work with the t2 trans, you'll need the t2 throttle cable. You'll also need to get rid of you "beehive" oil cooler if you haven't already.
I will throw this out there, the ~$1000 or so for the 12a rebuild is far cheaper than a t2 swap, mine came out to about $3000 by the time i was done, and I didn't have to rebuild it... Just food for thought.

thunkrd

iTrader: (1)

another way you could go is to buy the respeed crossmember. instead of buying the RB 13b in 12a chassis thing

84gs_rx

this is the site for the engine so you can see what all it comes with, i'd be getting the ignition wires. if i got the coils from the S4 could i jsut run those instead of having to splice?

82transam

iTrader: (18)

Very true, you also have the option of getting rid of the crappy stock steering with that too...

84gs_rx, I think you forgot to paste the link

84gs_rx

http://got-jdm.com/8688-jdm-13bt-s4-...ncut-p-67.html

yep....sorry about that. ahhh i dont know what to do. now im looking at 13b swaps. my 12a is definatly on its way out and rebuilding the transplant motor with the frail 12a hosuings worries me plus i was more power but for cheap 1500 or so thats for putting up with my newbee un decided *** you guys are very helpful

82transam

iTrader: (18)

Personally I'd keep shopping, thats a bit much for an S4, my S5 after shipping was 100 less than that. Atkins has some JDM S4 T2's in stock right now I think, you might want to check them out, not sure what their prices are like, but at least they know rotaries. Just keep in mind that getting the T2 engine is only part of it, you'll spend that amount of money again just on all the parts needed to get it running...

84gs_rx

yeah very true plus im inexpirenced so it would be better to attempt a 13b N/A swap until i have more money and a better grasp on the project. the 13b still is hazy with me, the wiring and EFI still scare me a but im willing to learn and give it a try. id rather carb it but i dont have the moeny for what Racing Beat is askin. I've spent the last 4hrs straight reading the forums trying to get it all down and will spend the next few days doing the same. thanks for the help 82transam

thunkrd

iTrader: (1)

do you have another car? i wouldn't do a swap unless you have another vehicle.

i would suggest upgrading brakes and suspension before doing the swap. I am at this stage.

yes it will be costly, but the end product will be kickass

82transam

iTrader: (18)

That about sums it up!

But I agree if you don't have another car the swap will be tough because you can't take the time to do it right. If you do have another car though I say go for it, it can be a daunting task at first, but if you break it down into pieces and smaller goals you can get through it. The wiring isn't so bad, the engine of "right side" harness is all plug and play, its only the body or "left side" harness you need to construct, a total of maybe 30 wires or so, not too bad. Search for a forum member named "steve84GS TII" he has a fully California legal S5 swap and has posted a lot of good info on his wiring and other aspects of his swap, he was a great help to me when doing my swap. I don't think he comes on here much anymore, but the info is all there in his old posts.

If you guys have any questions let me know, I have a NJ legal (not as hard as CA, but still not easy) S5 swap, and am currently working on restoring a 91 FC so I'm fairly knowlegable about the FC setups...