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Location:
Glossodia,NSW
Registered:
May 2002
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3sgte ecu's
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Wed, 21 January 2004 08:11
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Does each version of the 3sgte engine have its own specific ecu,or can a different version/years ecu be used.
Like for example a 91celica GrpA 3SGTE engine,do i have to get that exact ecu for that engine,or can i use a 3sgte ecu from an mr2 or just an ecu from a gt4 celica etc???
Cheers Adrian
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: 3sgte ecu's
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Wed, 21 January 2004 08:39
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From what I have seen the MR2 ECU's are different to the GT4's.
And there are differencies between the GT4 ECUs aswell. The main difference is the Gen 3 having a map sensor.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: 3sgte ecu's
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Wed, 21 January 2004 09:21
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Pinouts are different too ..
And mapping wise:
gen 1 and 2 gt4 ones map up to 14ish PSI .. Group A versions , and Mr2 versions can handle upwards to 18psi.
Group A ECU's and possibly the st165 have codes built in for water to air intercooling - and can result in the dreaded code 54
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Location:
Glossodia,NSW
Registered:
May 2002
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Re: 3sgte ecu's
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Wed, 21 January 2004 09:28
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Ok but heres what i want to do.I'm looking at a 3sgte engine from a 91 celica gt4.I want to put this engine in my mr2.My mr2 is non-turbo at the moment,so this will be a conversion.What i'm asking is really,can i use the mr2 3sgte ecu with the 3sgte engine from the celica.I cant see any reason why this won't work.The only thing i can think of,is the sensors may be a lil different on a mr2 3sgte compared with the ones on a celica,so i may have to change a few sensors.
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Location:
Colac, Victoria
Registered:
May 2002
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Location:
Glossodia,NSW
Registered:
May 2002
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Re: 3sgte ecu's
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Wed, 21 January 2004 09:50
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mr2's the early sw20's were using afm 3sgte's then i think it was 93 or 94 they changed specs to map versions and got more powerful as the versions went on.My mr2 is a 91 model.I'm pretty sure this will work.I've been told by a few sources that the 3sge ecu's in the mr2 are a direct swap,the only wiring hassle is with the fuel pump,which requires a bit of fancy wiring to get it to work properly.So in "THEORY" if i swap this engine over,use the turbo gearbox/shafts from the mr2 and ecu etc etc.This should work
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Location:
Brisbane
Registered:
February 2003
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Re: 3sgte ecu's
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Wed, 21 January 2004 10:29
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i would imagine that the non-Group A Gen2 GT4 ECU is the same as the Gen2 MR2.
However the Australian and US are different from the JDM ones. The JDMs have more advanced timing for more power and responsiveness and 100RON fuel.
If you want I can grab the model number of my JDM Gen2 GT4 ECU, and perhaps you can find an MR2 one and compare.
Here is an article about putting an MR2 Turbo 3SGTE into a GT4, so just reverse it and it should be helpful :
http://gtfour.supras.org.nz/3S-GTE%20Conversion.ht m
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Registered:
May 2002
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Re: 3sgte ecu's
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Wed, 21 January 2004 13:25
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The Group A ECU has uses extra pinouts and the standard ones are in different location when compared. For what you want to do its a straight swap. They might have slightly different mapping depending on where the ecu's came from.
Both motors are identical sensor wise.
GT4 Group A
Anhar Khamas
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Location:
Parramatta
Registered:
July 2002
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Re: 3sgte ecu's
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Thu, 22 January 2004 05:53
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ok first of all not a great idea with the celica motor i dont think espesally if ur talking about ecus etc...
for these reasons if ur going to use the orginal ecu from the celica motor into an mr2 sure can be done but with a hell of a lot more money $$$$$
aslo some things i dont know if u have though about intercooler where u getting from???? use the celica one a top mount??? not going to work, for too long!!!!
also u will have to keep ur gear box being na smaller box internals (cant handle as much power was not built for a turbo) also smaller brakes and smaller CV's
if i were u get a half cut u get the ecu and wiring, the gear box the cv's the brake upgrade and some other goodiess. and then seel the rest to ppl like me.... LOL
as for the gens of the mr2 1989 (its when the were first relesaed) to 1993 (december) all the same motor all afm type.
169kw @ fly wheel
then 94 and up were the gen 3 map sensor thats the motor u want however costs an arm and a leg also very very hard to find.
180kw @ fly wheel
i am a beliver if ur going to do it right do it right the first time.
my 2c
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Location:
Glossodia,NSW
Registered:
May 2002
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Re: 3sgte ecu's
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Thu, 22 January 2004 06:16
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Ok,i'll try to answer some of your responses guys.
Firstly,i'm probably getting this 3sgte for $300 so it's cheap as.Now i've already got the brakes upgraded with cross drilled and slotted rotors,front and rear.The intercooler is not a problem already got one ready to go,all i'll need is some pipe work.
I plan on using the gearbox and drive shafts from a turbo mr2 anyway,of course the na gearbox/shafts wont handle the power,they are piss weak.
But getting back to the original question,would i be able to run this engine using a turbo mr2's ecu.I beleive it will work.It should be fine.Remember i'm just using the engine,not the celicas wiring loom or sensors.
I cant see this being more expensive than going the half-cut route.Not when a half cut is about $2500-$2800,and then a workshop will charge about $1000 for labor to put everything in.
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Location:
Parramatta
Registered:
July 2002
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Re: 3sgte ecu's
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Thu, 22 January 2004 21:23
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no they will not work the pin out is different!!! u will have to use a celica wiring harness and ecu
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Location:
Syndey
Registered:
December 2002
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Re: 3sgte ecu's
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Thu, 22 January 2004 22:52
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having done a fair bit of work on toyotas they tend to keep things the same, so provided the dizzy is the same in the celica and MR2 you should be right, it dosent really make a pinch sh!t of difference if the orignal motor is map sensored or MAF, just as long as the TPS, air temp, water temp sensors are the same it should work perfect
Dale
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Location:
NSW
Registered:
September 2003
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Re: 3sgte ecu's
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Fri, 23 January 2004 01:13
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Why not just get your hands on a pre Dec 94 SW20 Turbo ECU and swap that in.!!!
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Location:
Glossodia,NSW
Registered:
May 2002
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Re: 3sgte ecu's
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Fri, 23 January 2004 05:36
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Thats exactly what i thought and plan on doing.I'm going to use an mr2 turbo ecu and the sensors/parts required to make it work
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Location:
Sydney
Registered:
October 2003
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Re: 3sgte ecu's
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Thu, 29 July 2004 13:02
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Sorry to dig up old threads, but it was the only thing I could find relating directly to 3sgte ecus.
Will a JDM gen2 ecu run fine on our 98 octane stuff, or is there more to it than that. Are we just better to run a aus spec ecu?
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Location:
Brisbane
Registered:
February 2003
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Re: 3sgte ecu's
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Fri, 30 July 2004 02:27
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yes it will run fine.
I've been running a JDM Gen2 ECU on my car for nearly a year. No problems at all, as long as you are on 98RON.
95RON gives a trace of detonation thou.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: 3sgte ecu's
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Fri, 30 July 2004 02:47
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the timings set a bit higher on jdm setups ..
note that also - they use 100 ron over there , so using jdm ecu may require playing with your timing to solve any issues
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Location:
Brisbane
Registered:
February 2003
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Re: 3sgte ecu's
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Fri, 30 July 2004 03:21
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no they don't need any timing adjustments.
Even thou they are tuned for "100 RON" fuel, Toyota would have not tuned them so hard that if slightly lower RON fuel was used that it would start pinging.
So yeah, as above I've run my car on the JDM ECU and 98 RON fuel without a trace of detonation.
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: 3sgte ecu's
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Fri, 30 July 2004 06:22
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What it boils down to is if you use a matched set of Computer Loom and Sensors it should run fine.
If you want to run a SW20 computer then run the SW20 loom as well, this makes it a lot neater and a hell of a lot less work anyway.
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Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
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Re: 3sgte ecu's
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Fri, 30 July 2004 07:32
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With my Gen.III 3S-GTE (1994-1999), it runs Optimax without a problem. The timing has been retarded to handle it a bit better than the standard timing, although boost will suffer a bit.
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