So, I'm working on my RE conversion. I got the engine, trans., fmic, and radiator in with the e-fan. I just realized that I have to wire this thing now. Anyone have any input? Are there any FAQ's on this? I was trying to keep the stock ECU since the turbo's are still stock (and because I can't afford a haltec). I'm not sure which wire to ground so the ECU doesn't think I'm always in park, or how to hook up the warning lights. I don't know if the CPU that runs them will even wire into the wiring harness. Help please, I'm dying to drive this machine.

P.S. I can't seem to find coils and ignitors for the Cosmo motor, are these necessary for the set-up, or can I patch in my stock FC coils?

 

can you post a little more info of what are you doing?like if its a S5,S4,TII,NA

 

stock 13b-re motor into an 86 n/a, with turbo trans and n/a rear end(unless i find a cheap tII one), fmic, e-faned koyo radiator. keeping the twin turbos sequential for the torque. Anything else you want to know just ask.

 

first you cant keep the twins as a sequencial setup,you need to change them to non sequencial.Now cause you are on a budget heres the cheapest way to do it,get a S4T2 MAF
S4T2 MAP,S4T2 ECU,Intake temp sensor and use the CAS off your old motor and all the ignition stuff(coil,igniters,etc) take all the sensors off the RE and swap them with the old ones(coolant,etc)so basicaly your running the RE with the T2 STUFF,now i will recomend running bigger injectors with SAF,R-TEK,or E-MANAGE,sounds complicated but its very easy in other words you are just swapping blocks if you do it this way,If you have any more questions just ask

 

I know it's possible to run sequential with a haltec, and if I wire in the stock RE ECU, then they'll work as well, just wondered if I could do it with MegaSquirt.

 

No, you can't.


-Ted

 

You can only run them non sequential. If you have the cosmo ecu, then it will probably be the same as trying to put an S5 ECU into an S4 car where you run into incompatibility issues.

 

Now I know for a fact that it is possible to run sequential with a Haltech, and you can read for yourself on this post here. As for the stock ECU, I'm sure there is a way to get it to work. If I'm not mistaken, isn't the reason S5 ECUs don't work on an S4 car is because of the sensors in the motor itself are different? I mean, can't you swap the S5 sensors into the S4 motor and have the S5 ECU run it?

Anyway, if it is a problem to do that for the reason of body controls, couldn't I make the stock Cosmo ECU run like a piggyback computer, just running the motor?

 

If you're doing something like that you shouldnt need to be asking questions about this, go and find a wiring diagram on the RE ecu.

 

couple of years ago when i us to live in PR I went to a rotary shop in DOMINICAN REPUBLIC
and i saw i couple of s4 and s5 running cosmo motors with the automatic cosmo ecu on a non sequencial setup,i rememberd talked to the owner and he was working on a 20B second gen swap kepping the stock twins and stock computer,i never got a chance to see the car running cause i moved to the states,he was saying that major challenge was rewiring the body,you should keep trying tigerboy rei i and iff you make it work post i writeup

 

adsifjifasf;k i can't believe you jumped into this swap before reading the wiring.

NO YOU CAN'T USE S4 HARNESS INTO THE RE MOTOR. There are TONS of little things you're missing. AFM, is different, the OMP is different. RE ECU won't work because they only came in automatics, the luxary items are not even the same especially if you are using a re ecu. It came from a complete different car. Not just "sensors" are different. Save your pennies for a used haltech.

 

Yes, that's getto-rigging the system just to get it to work.
It does not identically control the sequential system as stock - that's my point.
One of the control solenoids is progressive, and the Haltech does not have such control - not straight out from one of it's pin-outs.
The Haltech can only do binary or PWM control - not analog control outputs.
So the answer is still NO.

It's sorta like asking...can you run the twins non-sequential and still control them with the Haltech?
YES.
The link you provided is just a more complicated answer, which is a royal waste of time as compared to an efficient single turbo conversion.


-Ted

 

While the JC ECU can't be used with the S4 harness, there's no reason why an S4 ECU and harness can't run a Cosmo 13B. It's still just a 13B, all of the sensors and fuel injectors are in about the same place and with the right connectors will work the same. The AFM is simply a plumbing connection and the automatic gearbox and "luxury items" are irrelevant.

I'm not saying it's an ideal set-up, but it would still work fine and allow the motor to be used until a better EMS can be purchased.