st205 into st185 swap faq/ and parts compatibility

Q&A regarding engines, turbos, and intercoolers and power upgrades

Re: st205 swap faq/ and parts compatibility

Postby aus jd 2703 » Thu Feb 25, 2010 10:57 pm

ok is it possible to run a st205 engine of a 185 ecu and loom?
what sensors need replacing and can i replace all sensors? the water elbow is got me worried?
just nt sure im informed enough to do the 205 swap so wanna be sure before i jump in over my head
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Thu Feb 25, 2010 11:09 pm

The questions you just asked are explained early on in this thread. If you take time, read it and take notes then you can decide if you are over your head. Scotts posts have the most info, and later on they are applied and verified or mods to his plans need to be made. Running a 185 ecu is a waste. It would not work anyway, two different air reading systems. MAP vs MAF.
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92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Re: st205 swap faq/ and parts compatibility

Postby aus jd 2703 » Thu Mar 04, 2010 12:59 pm

Hey has any one figured out a way to wire the ecu and intercooler up so it doesn't throw a code at all?
Also I have an early 1990 3sgte so I don't have te1 and te2 what did u guys do here?
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Fri Mar 05, 2010 2:08 am

aus jd 2703 wrote:Hey has any one figured out a way to wire the ecu and intercooler up so it doesn't throw a code at all


It requires all the 205 connectors. There is something special how the 205 plug is wired to make it work. So if you have a 205 clip, you can pull the wires and make it work, if not you are best doing the code 54 fix.

aus jd 2703 wrote:Also I have an early 1990 3sgte so I don't have te1 and te2 what did u guys do here?
Cheers


On my notes those are listed as "check connectors." Its been a few years so I do not remember what that means.

Now on the 1990 BGB it looks like the te1 is listed. It is just marked as T but the description is t-e1.
I am not sure about te2 though. You may want to do some research and find out if it is somehow related to OX. Some people in this thread did this on a 90-91 model, so you may want to PM them and post your findings here.

http://www.celicatech.com/imagearchive/ ... /FI/FI.htm

Direct link:
http://www.celicatech.com/imagearchive/ ... I/FI95.htm
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Re: st205 swap faq/ and parts compatibility

Postby aus jd 2703 » Fri Mar 05, 2010 5:03 am

yeh i worked it out looks like ill be stealling 4 or so wires from the 205 loom for the inter cooler, i may also run tvis as my tham was using cold start injector but that wont work as it doesnt go to ground.
leving all the st205 air con stuff unconnected,
this all sound right?
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Fri Mar 05, 2010 3:56 pm

If you don't use tvis look at your egr wires. That may be another solution. I would suggest plugging in the ac wires correctly at the ecu even if you do not run an AC. I found the wires unplugged make the car run poorly. I am still trying to figure out why, because this is what keeps me from running my AC at the moment.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Re: st205 swap faq/ and parts compatibility

Postby aus jd 2703 » Sat Mar 06, 2010 12:54 am

problem is i dont have the sires in the harness for the st205 stuff eg: what do i do with ats eco and cco?
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Sat Mar 06, 2010 3:28 pm

If no one responds here, I would suggest making a thread on ctech about identifying those pins. There are a few wiring experts over there, and you might find out exactly what you need. I never messed with 90-91 wiring so I am not too much help in that respect. I have a feeling there is something on the 90 harness that is the same thing, it just might be noted different between the years.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Re: st205 swap faq/ and parts compatibility

Postby celicat93 » Mon Jun 28, 2010 6:59 pm

So if you had to do another one of these, having learned all you have and the notes you've taken, how long do you think it would take to do it again? My 185 transmission is in need of major work and I've been considering doing a 205 swap, considering that the 205 transmission is stronger, why not go for the upgrade across the board? Get the extra ponies and the WTA IC, etc. I have to say that the difficulties you've faced are intimidating, but as I look at nearly a $3000 price tag to rebuild my 185 gearbox, it brings me back to this idea again.
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Mon Jun 28, 2010 7:09 pm

If I had it to over again, and all the tools and parts I needed, I could do it in a month. Likely less than that, but I am trying to overestimate due to the factor of "life."
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: st205 swap faq/ and parts compatibility

Postby celicat93 » Mon Jun 28, 2010 8:47 pm

CMS-GT4 wrote:If I had it to over again, and all the tools and parts I needed, I could do it in a month. Likely less than that, but I am trying to overestimate due to the factor of "life."


That's always a good factor include. Thanks, that's encouraging!
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Re: st205 swap faq/ and parts compatibility

Postby aus jd 2703 » Thu Jul 01, 2010 2:05 am

hey guys im a lil stuck ive got the engine all wired up but i need some pins so i can create some wires for the intercooler.
now ive checked and the st205 pins are different as the changed the locking mechanism in the plug so thats a no go, so i need to get some pins that fit in a 1990 plug, does nay one have any ideas?
i dont think my wreckers will let me cut the plug off with out taking the whole looms which cost $$ and imo nt worth it.
does any one know where u can buy just the pins?
cheers
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Thu Jul 01, 2010 2:49 am

I would suggest a patch harness. I used that so I did not have to hack up my oem wiring. They are not cheap, but that was the solution I used. I just tapped a plug into the wire I needed on the patch harness. You would then be able to run what ever wire to the intercooler you wanted.

See link.
http://www.berktechnology.com/shop/product.asp?P_ID=489
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: st205 swap faq/ and parts compatibility

Postby aus jd 2703 » Fri Jul 02, 2010 12:03 pm

hey guys has any one wired up a ecu and engine that has an exhaust gas temp sensor?
where did you guys run the egt wire to?
i cant work out if it goes to cco or egw but from what ive read it goes to cco.
any ideas or experiences?
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Re: st205 swap faq/ and parts compatibility

Postby CMS-GT4 » Fri Jul 02, 2010 3:43 pm

It is not needed so it will run fine without it. Just cap the bung where it goes or buy a down pipe.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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