3SGTE: MK2 NA > Turbo Write-Up

[Gweeven]

So is changing the axles necessary if you are using the non turbo transmission?

btw, awesome writeup.

[Basement Digital]

Originally Posted by Gweeven

So is changing the axles necessary if you are using the non turbo transmission?

btw, awesome writeup.

Nope. If you use the tranny that came out of the car; use the same axles too.

Thanks.

[MR2 Drifter]

Which ACT clutch did you get exactly?

Is there a website or something?

[Basement Digital]

Originally Posted by MR2 Drifter

Which ACT clutch did you get exactly?

Is there a website or something?

ACT / Advanced Clutch Technology®

[MR2 Drifter]

wow those clutch are expensive

[braydo]

I finallly got my swap running thanks to your help! Problems I have are 1. My rpm gauge doesn't work. 2. I'm throwing a code 43 and engine dies after running for about 20 seconds. 3. I'm throwing a code 52 but my knock sensor is broken so I know what that problem is obviously. Do you have any ideas?

[MR2 Drifter]

Did you need to use a AFM (Air Fuel Module i think?) when installing the engine?

[Basement Digital]

Originally Posted by MR2 Drifter

Did you need to use a AFM (Air Fuel Module i think?) when installing the engine?

Yes. The gen2 3SGTE uses an AFM (Air Flow Meter). You'll want to make sure your swap includes this part with the complete engine harness. To my knowledge the only way to bypass it is by using a stand-alone ECU.

You will need everything listed on the attached picture (I did not make this one) with the exception of:

• Airbox resonator
• Airbox (If using an aftermarket air filter)
• Engine bay temp sensor (Comes on turbo body harness, but not required when manually wiring your intercooler fan)
• Intercooler fan & piping (If using aftermarket, IE SPAL & Greddy)
• Fuel pump relay & resistor pack
• EGR stuff (None of this comes with Japanese motors)

And then of course all non-necessity items such as cruise control or AC.

[Basement Digital]

Originally Posted by braydo

I finallly got my swap running thanks to your help! Problems I have are 1. My rpm gauge doesn't work. 2. I'm throwing a code 43 and engine dies after running for about 20 seconds. 3. I'm throwing a code 52 but my knock sensor is broken so I know what that problem is obviously. Do you have any ideas?

Glad it runs!

I haven't been on in a while so I'm not sure if you have these problems sorted out yet or not. I'll have to dive into my service manual before I can start speculating. Maybe I will if I get a chance after work.

[braydo]

Originally Posted by Basement Digital

Glad it runs!

I haven't been on in a while so I'm not sure if you have these problems sorted out yet or not. I'll have to dive into my service manual before I can start speculating. Maybe I will if I get a chance after work.

Okay so figured everything out. Car is running like a top. A couple things in the tutorial caused a few problems. One problem I had was on the starter relay, In your tutorial you pull from the white cable for the sta pin. I couldn't get it to send the right signal unless i pulled it from the red cable.

Another problem I had which was causing my car to die after seconds of running was the fc pin on the ecu. In your tutorial it makes it seem like on JDM ecus the fc is on plug A. In reality on the turbo 91-92 ecus jdm or usdm its on plug C.

Other than that this swap how to is the greatest write up ever. I don' think I could have done this swap without you. I haven't been able to drive it yet because I haven't put on the subframe or suspension but it runs like a top. I'm not throwing any codes now, If you ever come to utah give me a call and i will buy you dinner lol.

[Basement Digital]

Originally Posted by braydo

Okay so figured everything out. Car is running like a top. A couple things in the tutorial caused a few problems. One problem I had was on the starter relay, In your tutorial you pull from the white cable for the sta pin. I couldn't get it to send the right signal unless i pulled it from the red cable.

This is interesting information. I'll have to look into this. You have a 91/92 3SGTE - what year NA did it go into again?

Originally Posted by braydo

Another problem I had which was causing my car to die after seconds of running was the fc pin on the ecu. In your tutorial it makes it seem like on JDM ecus the fc is on plug A. In reality on the turbo 91-92 ecus jdm or usdm its on plug C.

Yes, I've learned that my JDM motor is a '93. 91-92's FC pin are indeed on plug C. 93's were changed to plug A.

Originally Posted by braydo

Other than that this swap how to is the greatest write up ever. I don' think I could have done this swap without you. I haven't been able to drive it yet because I haven't put on the subframe or suspension but it runs like a top. I'm not throwing any codes now, If you ever come to utah give me a call and i will buy you dinner lol.

I'll hit you up for sure. Do the same if you visit Oregon.

[cjrxthree]

awesomeeee write up. thanks for the info
im definitely going to be following this when I do my swap.
especially since i myself am on a budget.

[Basement Digital]

Here are a couple of PM's I've received lately - posted for everyone's benefit:

Originally Posted by Basement Digital

Glad you're finding it helpful!

1) Configuration is stock. Stock MAF sensor with a K&N style filter on the end of it instead of airbox/resonators. This allowed me to "stuff" the intake into the driver's side engine vent.

2) Coil/ignition is straight forward. The turbo engine harness includes all sensors and wiring, including the turbo igniter (assuming it's complete) with the exception of the two wires to be added to the NA fusebox.

3) I sure did [try]. I wanted to use the lighter weight 5S flywheel with the 3S motor - but it does not bolt up, believe it or not. The 5S disk is marginally smaller in diameter than the 3S, but my ACT has been holding up quite well.

4) I used a 1993 3SGTE out of a JDM MR2. I recommend this swap over the celica motor because of its "plug and play" nature.

I also had Honda experience prior to this project and I can tell you that putting a JDM B16A into an 88 CRX DX is a much more comprehensive process.

MR2 engines can easily be removed without hacking anything, leaving very little work to do when putting them back in.

I shopped around for about a year before I found the deal I was looking for on my motor. It wasn't easy - but they're out there. Just make sure you go with the MR2 3S and that it's as complete as possible. I have a picture somewhere on the writeup thread that outlines the different components of a 3SGTE that you will need (couple exceptions like EGR, etc).

Originally Posted by Basement Digital

Well hey, thanks and you're welcome!

Honestly the whole writeup was kind of thrown together. When I started writing it I quickly learned why it hadn't been done in detail before.

The bit about the fusebox is particularly lacking. This is because I was fortunate enough to have both fuseboxes and easily repin the NA one without having to look at a wiring schematic. I was hoping that the pictures would be almost as revealing but was never really sure if they were suitable.

Do you have both fuseboxes? Both of them have identical "holes" on the underside and plugs on the top. The difference are in the pins that connect between the two.

If you do not have the turbo fusebox, you will not have the pins needed to connect the igniter relay to the turbo engine harness. Your best two options at this point would be to either obtain a turbo fuse box to pillage, or add your own wires for a hack n' splice/solder project.

Hope this helps.

[MR2 Drifter]

Is this what you did?

You just dropped the 5sfe,

added those 2 wires to the fusebox,

"hacked" the ECU and hooked it up,
[I don't get what you mean by this part?, you have to cut the plug A from the 5sfe and connect the wires to the 3sgte plug A?]


put the 3sgte in there, hooked up all the hoses and wires
[is there any modding at this part? like you have to get a longer hose or something?]

Then add the intercooler, intake, exhaust

Is that about it or is there any additional steps you had to take? or other things you have to buy?

Also did you get a turbo cluster? turbo timer? boost gauge?

thanks

[Basement Digital]

Originally Posted by MR2 Drifter

Is this what you did?

You just dropped the 5sfe,

Yup.

Originally Posted by MR2 Drifter

added those 2 wires to the fusebox,

Yup.

Originally Posted by MR2 Drifter

"hacked" the ECU and hooked it up,
[I don't get what you mean by this part?, you have to cut the plug A from the 5sfe and connect the wires to the 3sgte plug A?]

Yes. Cut plug 'A' from the 5SFE body harness and splice on the turbo one, making sure each wire is going to the correct pin of the new ECU.

Originally Posted by MR2 Drifter

put the 3sgte in there, hooked up all the hoses and wires
[is there any modding at this part? like you have to get a longer hose or something?]

No substantial modding. All existing hoses hook right up (assuming you're using a Gen 2 3SGTE out of another MR2 (not Celica)). You may come across some issues with your throttle cable as configured with the cruise control box. I removed mine (CC box) and routed the cable directly to the throttle body without any problems.

Originally Posted by MR2 Drifter

Then add the intercooler, intake, exhaust

Yup. A couple of tips: Install the intercooler before installing the motor. I didn't and it was a pain. [piping can go in later] Also, the grill over the intercooler side vent is not present on turbo models; I left mine on not knowing this. Last but not least: Install your fancy new turbo exhaust system with the rear suspension x-member. I had to uninstall mine because the exhaust wouldn't fit.

Originally Posted by MR2 Drifter

Is that about it or is there any additional steps you had to take? or other things you have to buy?

Also did you get a turbo cluster? turbo timer? boost gauge?

Don't forget about aformentioned and important steps regarding the transmission.

Other than that; remaining steps are really optional in terms of getting the 3s running.

I kept my stock cluster because I used the 5s tranny. I have not installed a turbo timer yet. I did get a boost gauge along with an oil pressure and exhaust temp sensor gauge. The boost gauge is the most important, cheapest and easiest to install.

I also picked up a Spal fan shroud and fan for my intercooler. It's hooked up to a 12v on/off switch - nothing fancy like the stock IC fan system, but it works.

[MR2-MRnot]

im still incredibly confused on the "repin" part, do i need a cut 3s body harness? can someone break it down for me...i feel like an R-tard cause i always understand things after i read them...ive read the thread at least 5 times, and im still confused! i get the adding of the wire on the fuse box, my head hurts, ive been thinking too hard!

[MR2-MRnot]

also, basement digital i PMed u with no response, just making sure u saw it!

[Basement Digital]

No problem! I'm in the process of updating the writeup. Give me a few minutes and I'll have it updated. There will be a new picture so the changes will be obvious.

[MR2-MRnot]

Originally Posted by Basement Digital

Turbo or '91 NA automatic ECU plug “A” for adapting body harness to new ECU.

not quite sure HOW i overlooked this, so where did you guys get yours from? and the 91 AT plug A fits?

[MR2-MRnot]

and NOWWWW i understand, ok, thanks a million, im probably the only retard who didnt get it... awesome work!!