ST205 ecu into ST165

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ST205 ecu into ST165

Postby knowitalls » Mon Oct 07, 2013 3:34 am

Just saw this on the Tweakdperformance website.
http://www.tweakdperformance.com/onlinestore/index.php?main_page=product_info&cPath=4&products_id=30

Ok, so the wires go to the correct places, thats awesome. What about the ST205 using larger 540cc injectors? What about the turbocharger differences? What else am I not thinking of here? TVIS?

Yes, in theory, plugging in an ecu thats tuned for ~245 hp sounds like a REALLY good bang for the buck but what's the catch? Do you have to switch injectors and maybe even the fuel pump to get it to run correctly?

Has anyone done this?
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Re: ST205 ecu into ST165

Postby built2run » Mon Oct 07, 2013 6:17 am

You still need the coil and igniter and yes the injectors and a tvis delete I would recommend the ats delete also the intake temp sensor and the map sensor all from the 205.

And that's 245 bhp and also on a much different head/cams and different turbo but yes indeed it's a better setup than stock
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Re: ST205 ecu into ST165

Postby built2run » Mon Oct 07, 2013 6:19 am

I did however do very very well on the stock ecu..... And there is also a way to delete the afm and be able to have some tuning for about 500-600 bucks and the stock ecu
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
ST185, black: current project, "The Kraken"
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Re: ST205 ecu into ST165

Postby Corey » Mon Oct 07, 2013 8:55 pm

I did a gen 3 mr2 ecu swap into my car last year. Best - upgrade - ever.

There is lots of information available on www.mr2oc.com about the swap aswell.
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Re: ST205 ecu into ST165

Postby knowitalls » Mon Oct 07, 2013 10:49 pm

built2run wrote:I did however do very very well on the stock ecu..... And there is also a way to delete the afm and be able to have some tuning for about 500-600 bucks and the stock ecu




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Re: ST205 ecu into ST165

Postby built2run » Tue Oct 08, 2013 2:23 am

It's using a gm3 bar map, gm intake temp sensor and a harness ads pert with a translator that retails for around 300-400

It's not plug and play and it does require a lot of tuning but you can't have it all I guess lol, regardless for 600 bucks or so and some time to get it dialed in isn't really all that bad
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
ST185, black: current project, "The Kraken"
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Re: ST205 ecu into ST165

Postby knowitalls » Mon Oct 14, 2013 1:52 am

built2run wrote:It's using a gm3 bar map, gm intake temp sensor and a harness ads pert with a translator that retails for around 300-400

It's not plug and play and it does require a lot of tuning but you can't have it all I guess lol, regardless for 600 bucks or so and some time to get it dialed in isn't really all that bad


If you were running the stock ECU, how did you do the tuning?
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Re: ST205 ecu into ST165

Postby built2run » Mon Oct 14, 2013 3:42 am

I didn't really I just mechanically set the timing and ran a borrowed afr till I got where I wanted to be
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
ST185, black: current project, "The Kraken"
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Re: ST205 ecu into ST165

Postby built2run » Mon Oct 14, 2013 3:44 am

That and well placed resistors throughout the harness at certain sensors actually looking back it was kind of a pain in the ass and took a while to dial in
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
ST185, black: current project, "The Kraken"
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Re: ST205 ecu into ST165

Postby knowitalls » Mon Oct 14, 2013 4:47 am

built2run wrote:That and well placed resistors throughout the harness at certain sensors actually looking back it was kind of a pain in the ass and took a while to dial in


Do you think I could get similar results if i used a SAFC to do the tuning?
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Re: ST205 ecu into ST165

Postby built2run » Mon Oct 14, 2013 4:52 pm

Possibly but honestly I've become more liking of the AEM bits. Like say a AEM FIC it's a piggy back and is relatively cheap at around 400 bucks then you can do a lot more without the ECU getting upset much. That's going to be the easiest way about it. And if you don't do your own tuning (usually you shouldn't if your not properly trained or experienced) almost every tuner knows their way around AEM electronics
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
ST185, black: current project, "The Kraken"
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Re: ST205 ecu into ST165

Postby Theman88b » Wed Oct 30, 2013 12:43 am

Any more information on this? I am very interested if you ended up trying this? Can we compile a list of what is needed? I would love to get rid of the AFM! Mainly I want to get a SMS but all they seem to make them for is the ST205.
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Re: ST205 ecu into ST165

Postby knowitalls » Tue Feb 18, 2014 2:55 am

You still need the coil and igniter and yes the injectors and a tvis delete I would recommend the ats delete also the intake temp sensor and the map sensor all from the 205.

And that's 245 bhp and also on a much different head/cams and different turbo but yes indeed it's a better setup than stock


So, the parts needed are:

550cc injectors
coil
ignitor
intake temp sensor
map sensor
TVIS delete

Will the gen 3 fuel rail fit on the st165? How do I wire up the map sensor and the intake temp sensor to my st165 harness?
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Re: ST205 ecu into ST165

Postby Pipedreams » Fri Feb 28, 2014 4:01 pm

Another way that I did on one of my st185s is using the MAF from the st185rc/carlos sainz and 550cc injectors on stock ecu. If I remember correctly I also ran E85 on that setup. The only other mods were a fuelpump, ct20turbo and a 3inch exhaust all the way. Worked great.
The st205 injectors won´t fit st165 since they are sidefeed and st165 are topfeed. But I think that Mitsu EVO 6-9 oem injectors fits right in and they are also 550cc.
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