205 Ecu Conversion

Talk EMS and Computer related performance

Postby **BETSY** » Tue Nov 14, 2006 6:52 am

Hi J, makes sense , Thanks.

Sorted the problem...

I had a FCD fitted!
obviously a a car that isn't heavily dependent on a map sensor to work is fine, not so on a st205 system though!

The car starts, revs, idles and EVERYTHING! :-)

how do people run more boost on a st205 system? 17psi fuel cut?
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Postby coyoteboy » Tue Nov 14, 2006 10:18 am

17psi yes, but with the 20b turbo, id stick to 1 bar on a 26 unless your IC is good. AFAIK theres no way of getting higher than 17psi on the 205 due to the sensor being the fuelling sensor, no.
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Postby **BETSY** » Tue Nov 14, 2006 3:44 pm

Hi, I'm running a TT s148 turbo on a st205 charge cooler set-up coupled with twin Pace charge heat exchanger rads and W/Inj.
Intake temps are VERY low.

shall report back with how the test drive goes tonight ;)
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Postby coyoteboy » Tue Nov 14, 2006 4:44 pm

:) You running the 205 pump or the 165 pump in that? Which one is it you're offering to sell me on the OC :D My CS CC setup is "sans pump" and im dying to see what effect a decent setup has over the stock air to air topmount!
'91 ST185 ATA.Megasquirted, MHG,SSAC 3" DP, fully wrapped 2.75 inch system,K&N,Forge DV, JDM ST205 turbo&transmission,JDM MR2 turbo engine.
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Postby **BETSY** » Tue Nov 14, 2006 9:42 pm

I run the st165 Cc pump.

make a note to ones self, the st205 system is running 16' BTDC, dizzy has been left alone and the st165 system was running 10' :shock:

done a fair few miles in the car now and all seems good, shall try some more boost and report back ;)
Steve Gillies
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Postby **BETSY** » Tue Dec 19, 2006 4:33 pm

Had a good result on the rolling road, 333BHP and 321Ib/Ft at 1.1Bar using the st205 based ecu system :-)
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Postby CMS-GT4 » Tue Dec 19, 2006 4:43 pm

Did you get your code 54 sorted as well?
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Postby **BETSY** » Tue Dec 19, 2006 4:46 pm

nope :-(
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205 ECU repairs ?

Postby Alltracgt4Knight » Sat Dec 23, 2006 8:01 am

I work for a High guality electronics manufacturer.
I design, make and repair aerospace products everyday.

If you have a bad / damaged 205 ecu send it to me and I can try to repair it for you...

I can have the profiles for the IC chips and I can test / inspect your ECU

I am working on making new profiles to enhance the ecu's
These enhancements would include such features as

Remove / Update :
REV limit
Boost limit
Fuel cut level
Speed limit

I am working to incorporate the following adustible options.
shift / launch control
fuel gain control
over-rev control

Keep in mind - not all ECU's are repairible, My team would have to inspect it and decide on the nature of the damage.
90 Alltrac GT4 sold to BoostedBlueToyotas
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92 4runner 7mgte turbo project
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Postby **BETSY** » Sat Dec 23, 2006 8:31 am

The main Issue with the st205 ECU is it throws code 54 due to there being no Charge cooler present, if converting to IC or ecu swap.
Certainly would be a worth while looking into it :-)
Steve Gillies
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Postby coyoteboy » Sat Dec 23, 2006 10:04 am

Steve - isnt that a simple case of lobbing a resistor in place of it? a code change to remove that seems a little drastic lol.
'91 ST185 ATA.Megasquirted, MHG,SSAC 3" DP, fully wrapped 2.75 inch system,K&N,Forge DV, JDM ST205 turbo&transmission,JDM MR2 turbo engine.
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Postby **BETSY** » Sat Dec 23, 2006 12:37 pm

J- Oh if it were only that simple!
No one.. has got over the code 54 on a car with out the stock st205 electrics in place as far as i know.

been there done that ;)

rev3 ECU was sooo much easier
Steve Gillies
ST-165 88 UK ([color=red]BETSY[/color])
[url=http://i32.photobucket.com/albums/d30/steve-gillies/Betsy/RollingRoad005.jpg]377BHP 353Ib/Ft[/url]
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Postby coyoteboy » Sat Dec 23, 2006 3:41 pm

Rev 3? you mean Gen 3? Rev 3 is the 205 engine, gen 3 is the 165 car :)

I'm almost certain people on the OC had cured it? It cant exactly be hard - all you have to do is match the elec specs of the pump while knowing the wiring, its not an intelligent feedback type system.
'91 ST185 ATA.Megasquirted, MHG,SSAC 3" DP, fully wrapped 2.75 inch system,K&N,Forge DV, JDM ST205 turbo&transmission,JDM MR2 turbo engine.
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Postby **BETSY** » Sat Dec 23, 2006 3:46 pm

Rev 3+ MR2 ecu
Gen 1 engine= st165
Gen 2 engine= st185
Gen 3 Engine= st205

:-)

I use a st165 chassis and loom to run a Gen 2 Engine which in turn is controlled by a MR2 Rev3 ECU system.

The st205 ECU can not be fooled by running resistors as people have shown in various diagrams, i have tried several different configurations, along with a few others on here.

If you convert a st205 to run a FMIC then there are other systems in place which allow the 'Resistors' to do there thing.
Steve Gillies
ST-165 88 UK ([color=red]BETSY[/color])
[url=http://i32.photobucket.com/albums/d30/steve-gillies/Betsy/RollingRoad005.jpg]377BHP 353Ib/Ft[/url]
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Postby coyoteboy » Sat Dec 23, 2006 4:00 pm

**BETSY** wrote:Rev 3+ MR2 ecu
Gen 1 engine= st165
Gen 2 engine= st185
Gen 3 Engine= st205

:-)


"gen" is usually referring to the body type, of which the 205 was a gen 6 (new ugly slow ones are gen 7). (http://en.wikipedia.org/wiki/Celica) Just clearing up confusion.
Suggesting Gens for the engine is a bad idea, as there were revisions *within* each body style as you know - different compression ratios etc across the 5th gen range despite being essentially the same engines from the same castings. Either way I know what you mean :)

The st205 ECU can not be fooled by running resistors as people have shown in various diagrams, i have tried several different configurations, along with a few others on here.
If you convert a st205 to run a FMIC then there are other systems in place which allow the 'Resistors' to do there thing.


Maybe im getting confused with the CS ecu which im fairly certain can, but im 99% certain ive *seen* a 205 with the pump removed by the local goon. What are you on about "other systems in place"?
'91 ST185 ATA.Megasquirted, MHG,SSAC 3" DP, fully wrapped 2.75 inch system,K&N,Forge DV, JDM ST205 turbo&transmission,JDM MR2 turbo engine.
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