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s4 na to jdm s5 tII

Old 09-21-12, 12:08 AM
  #126  
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beautiful.

The wife just bought an 87NA and i bought a 91NA w/ t2 Jspec swap =] Gonna do some mean stuff so. I like how u did and i will probably use yours as guidance. Thanks for all the detailed posts
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Old 10-08-12, 01:48 PM
  #127  
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^ sounds awesome, I need a girl with a seven!

Anyway, been saving my paper. Tying to get a BNR stage 4 and I wanna upgrade the fuel system before I go to a dyno!

A kid I went to school with works in a pretty nice performance shop in concord NC but there tuner hasn't messed with a E6K so I may keep looking. Anyone know a good shop that knows rotarys and haltechs on the east coast? Close to South Carolina.
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Old 10-10-12, 04:00 PM
  #128  
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yo put up a video of it running!
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Old 10-14-12, 11:00 PM
  #129  
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This thread is giving me hope! Our circumstances could not be more identical, 86 base model and I just finished dropping an S5 JDM into it today. And to top it all off I've been planning on painting it black since before I got it! Everything looks awesome dude, I'll be following your progress for a while.

Originally Posted by sideways-FC View Post
you can find the fsm at rotaryheads.com look under wiring diagrams. it would probably be easyer to disect a stock s5 engine harness to see were all the wires need to go for the maf, map, iat, cts, injecter outputs. then the cas and ignition output wires run through the body harness you would have to trace them and findout wich wires they are on the ecu plugs I dont know if the s4 and s5 cas and ignition wires are the same. once you trace them and knew wich pins on the ecu they are you could just wire them in to your new engine harness you would be makeing. then you could just find out wich pin is for the ecu power supply then you could just wire up a relay to power the ecu and off that same relay you could send the injecters there 12v power supply. theres a lot of awsom cool ways you can wire things up. if you wanted to do it that way I could help you along the way and answer all your questions. I would want to see how it turns out.
Is that offer still valid? I was planing on dissecting mine but it's looking a bit daunting, some friendly help would be appreciated.
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Old 10-15-12, 07:46 PM
  #130  
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hell yea! Im always up for wireing! just get the ecu you will need and print out the fsm pin outs. and ask away.
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Old 10-15-12, 09:47 PM
  #131  
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Awesome! This has got to be the most welcoming internet community I've ever seen. I hadn't had my car for a week when this dude pulled over next to me to welcome a new rotary owner to town and invited me to hop on this forum. The guy goes by Rx7_Nut13B, real cool guy and very helpful.

I already have the ecu and engine harness and I'm downloading FSM's right now so I've got some reading ahead of me, but man this thread has really got me pumped! I don't want to hijack your thread Rotorhead so I guess I'll make another one but I'll definitely be watching your progress, this is what I've been dreaming of and bankrupting myself for!
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Old 10-15-12, 11:52 PM
  #132  
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I'm not worried about thread jacking, I won't have any updates for awhile. Any useful swap information is more than welcome here!

So what's your game plan? Are you gonna go s5 electronics or s4? I suggest a standalone to be honest. You can find used ones in the classified section all time!
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Old 10-16-12, 12:23 AM
  #133  
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Originally Posted by RoToRhEaD722 View Post
I'm not worried about thread jacking, I won't have any updates for awhile. Any useful swap information is more than welcome here!

So what's your game plan? Are you gonna go s5 electronics or s4? I suggest a standalone to be honest. You can find used ones in the classified section all time!
yea standalones are always easier and more awsome if you can aford them in my opinion! but if cliffhanger wants to go with the stock s5 ecu that will work just fine.
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Old 10-16-12, 12:27 AM
  #134  
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so cliff hanger do you want to make your own harness from scratch or mod the s5 harness?
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Old 10-16-12, 04:20 PM
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Here are a few pictures of how it came to give you an idea of how it came in, pardon by terrible camera.



https://www.rx7club.com/members/clif...0361-48923.jpg

As you can see in the first pic, it came with the S5 ecu already plugged in to the engine harness. Since those pictures were taken I've stripped it, done the rats nest removal, and mounted the engine and ecu into my car. My plan was (and let me know if I'm being naive here) was to run the engine harness to the ecu like it is in that picture, cut the dash harness, and splice it to the tail of the plug that came on the ecu. This is of course assuming things will match the way I had thought they would.

A standalone system would indeed be cool but I pretty much broke the bank getting here so I need to make do with what I have.
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Old 10-16-12, 05:52 PM
  #136  
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That engine looks a lot better than mine did when I got it! We're did you get it? Have you done a compression test?

I've spent hours lookin at the diagrams when I was in school and it seemed like most of it was simular but I didn't want to try. I think you should give it a try, the only other thing I can think of, beside what I did, is to use a S4 turbo ecu and harness/electronics. Time to bust out the FSM!
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Old 10-16-12, 06:08 PM
  #137  
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using the s4 ecu and harness with s4 electronics probably would be easier! but using the s5 stuff shouldnt be to much of a pain. Im shure theres a thread somewhere with details on it.
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Old 10-17-12, 11:41 AM
  #138  
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here is a video of it running 020 | Flickr - Photo Sharing!

i may be getting a tune soon after all
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Old 10-18-12, 12:25 AM
  #139  
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Originally Posted by RoToRhEaD722 View Post
That engine looks a lot better than mine did when I got it! We're did you get it? Have you done a compression test?)
I got mine from this website Texas JDM Engines - Direct Importer of Japanese Engines the guy said he sells a lot of these engines and was all out of stock the first time I called. He told me he had 3 and would do compression tests before shipping as well, but he at least called them rotors not cylinders.

I don't have the equipment to do my own test so I've got my fingers crossed on this one. It cost me $1500 shipped which didn't seem like a horrible deal from what I saw.

Originally Posted by sideways-FC View Post
Im shure theres a thread somewhere with details on it.
That's what I figured but I've yet to find one, If this works I'll do a write up myself so there will be one out there. If you've come across one by all means let me know!
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Old 10-18-12, 02:36 PM
  #140  
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Originally Posted by Cliffhanger View Post
I don't have the equipment to do my own test so I've got my fingers crossed on this one.
take two spark plugs out and turn it over by hand, you should be able to hear each compression stroke. when i tried this on my engine for the first time it would just free spin. no puffs of air at all

i got my car to idle around 14:1 today! but my oil pressure is still really high and it worries me.
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Old 10-18-12, 03:05 PM
  #141  
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Originally Posted by RoToRhEaD722 View Post
take two spark plugs out and turn it over by hand, you should be able to hear each compression stroke. when i tried this on my engine for the first time it would just free spin. no puffs of air at all

i got my car to idle around 14:1 today! but my oil pressure is still really high and it worries me.
if a moter has realy good compression you should feel a little bit or resistens as you turn it as it compressis if the spark plugs and omp jet holes are pluged! and it will chug realy good. if you have a starter a battery and the transmission you can do and out of the car compression test.
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Old 10-18-12, 03:42 PM
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Originally Posted by RoToRhEaD722 View Post
take two spark plugs out and turn it over by hand, you should be able to hear each compression stroke. when i tried this on my engine for the first time it would just free spin. no puffs of air at all
Well if that's all you need I'm good, I already hand cranked it and I could hear/feel the puffs coming out of the exhaust. I didn't know if that was enough to verify compression or if that would happen even with worn seals.
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Old 10-21-12, 04:52 PM
  #143  
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It has begun!

So I started cutting and soldering and this is what I'm working with. Apparently they downsized when I uploaded them to my profile but it's from the factory service manuals.

S4 NA pinout




S5 TII pinout




I found this thread a while back and he was doing exactly what I'm doing, the only problem is I didn't see anywhere that says if he was coming from an S4 TII or NA.
https://www.rx7club.com/2nd-generati...hassis-703692/

These are the under the dash splices he gave and for the most part I see the same thing as him.

S5-->S4

1A-3J
1B-3I
1C-3B
1D-1D
1E-1A
1F-1B
1G-1X
1H-1V
1I-1J
1J-1U
1K-3D
1L-1F
1M-1C
1N-1R
1O-1E
1P-1W
1Q-1L
1R-1G
1T-1I
1V-1M

Like I said I'm not sure if he's coming from an NA S4 like me or a TII so I don't wanna chance that a few pins are different and fry my ECU. There are a few connections he has listed that I don't understand how he got, such as 1E-1A 1F-1B. On my S4 FSM 1A and 1B have identical descriptions but the S5 FSM lists the wires his write up says to connect to (1E and 1F) as 2 different things (Malfunction indicator lamp and Self diagnosis checker). And 1I (Test connector) to 1J (Initial set coupler).

So what do you think, should I proceed as he has?
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Old 10-30-12, 12:28 AM
  #144  
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which fmic is that??
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Old 10-30-12, 12:44 AM
  #145  
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Godspeed
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Old 11-16-12, 02:52 PM
  #146  
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purple nuts!! go ravens!




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Old 11-19-12, 08:09 PM
  #147  
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If you didn't get it started yet there are wires on the harness on the S4 na and TII that needs to be pulled at the ecu. I wish I would have seem this earlier this year. If you need to know the wires pm me and I will tell you.
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Old 11-29-12, 05:49 PM
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Well I've extended the JDM harness to reach my ecu and rewired according to my above post. So far the engine turns, the radio and headlights are functional, but the fuel pump doesn't come on yet. I didn't expect it to work yet because I don't have the connection on the engine harness between the firewall and ecu wired to the dash harness yet. I'm having a hell of a time finding diagrams for these connections.

I've also noticed there's no connection on the S5 harness for the fuel pump relay that goes under the airbox, did the S5 use something different or have it somewhere else?

I'm getting pumped about this, hearing it turn was really exciting!
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Old 11-29-12, 06:27 PM
  #149  
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The fuel pump relay connector is apart of the main harness on my car but I have no idea what kind of car my harness came from. You should be using s4 relays though right?
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Old 11-30-12, 04:02 PM
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Early model S4 uses low imp injectors. S5 use hi imp injectors like the 88 TII S4. You can use the stock S4 harness but have too mod either injectors clips and the plug for the injector box to use the S5 injectors. You can use a N338 Vert ecu or N333 for the hi imp injectors that's the way i ran mine the 1st time. Or use a N332 get TII Lo imp injectors to run your injector box. Using the S5 harness will be a waist unless your goin to swap the dash harness to use the stock JDM harness and ecu.
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