4AGE to 4AGZE

DownhillMR2 · 11-09-2009, 07:31 AM

Okay! So I finally decided on what I'm going to do, as the price of rebuilding the 4AGE is more than just picking up this catalog_product. With shipping it's 1500, and it's the ECU (Which I'm currently emailing them about to find whether or not it includes the harness. One would think it would, but you never know!), transmission, and of course the motor. So, my questions are as follow:

1. If the harness is included, should it be cut, what will need to be done? Why is an uncut harness superior?
2. Is the price decent. I could pick up a 3SGTE for 400$ more, but I don't know nearly as much about those swaps. Would it be worth it?
3. If I do do the 3S swap, would I also need the shafts?

mr3 · 11-09-2009, 08:16 AM

4agze swap would be way easier and cheaper than a 3s. Use your c52 stock transmission with the 4agze so you don't need sc axles. You are going to need to do a few wires if I'm not mistaken. The supercharger light on the dash and the octane level switch. The body harness should match up but I never did the swap yet. I would figure 1500 for everything. That's what I did with my 20v swap and I'm close to that but it takes time. I'm now 2 months delayed because stuff comes up. Once my 20v is running I'm going to think about sc on my 87 daily.

DownhillMR2 · 11-09-2009, 08:28 AM

Hm.. What's an octane level switch? Do you mean like a change, or a physical 'switch'? And is the S/C light absolutely required? I don't really mind being alerted by it, but if I don't have to do it, I won't. Wouldn't a boost gauge be doing the same thing, effectively?

DownhillMR2 · 11-10-2009, 04:13 AM

Good thing i've decided on the swap. Coming home tonight, my check engine light came on, and I couldn't do anything about it. It went off about 15 minutes later, and when I got home, I got out of the car and turned around and my engine was lightly smoking. Looks like it just overheated, thankfully. Gonna do a coolant swap and air check tomorrow.

DownhillMR2 · 11-10-2009, 09:06 PM

So, a new question: After I'm done installing the new motor, I plan on keeping and completely rebuilding the stock 4AGE. I'm going to do the internals first, and I need to know if anyone has purchased pistons, valves, cams, etc online from a reliable company, or do I need to go through Toyota for new internals?

mr3 · 11-10-2009, 11:01 PM

Someone just posted a thread on parts for the entire rebuild. There is no kit out there but you can buy the parts you need from Toyota.

DownhillMR2 · 11-11-2009, 03:22 AM

Ah, thanks. I'll look for it.

DownhillMR2 · 11-15-2009, 05:00 PM

So, new question. The GZE I'm picking up to swap doesn't come with a wiring harness. Can the N\A wiring harness be used with the 4AGZE ECU? Or am I going to have to shell out and find a 4AGZE wiring harness? The site's saying it comes with the following:
• Complete Motor
- Block
- Head
- Intake Manifold
- Exhaust Manifold
- Sensors
- Fuel Rail
- Injectors
- Cam Angle Sensor
- Throttle Body
- Alternator
- Starter
- Ignition Wires
- Pulleys
- Supercharger

• 5-Speed Transmission

• Computer(ECU)

• Intercooler

What all else am I going to need? I'm going to re-use my water pump, but will I need a new timing belt also? I know I'll need an ignitor. Is it recommended to upgrade the fuel pump as well? This may sound dumb, but I've never had a supercharged car, does the oil pan need to be tapped like with a turbo setup?

My other question is, I found this: JDM Engine - JDM Motors - JDM Parts - JDM Transmission - Honda Cars, Nissan, Subaru, Mazda, Toyota - A 20v Silvertop with the ECU\Harness\Transmission, but the site is saying it's a FWD transmission (Don't know if that makes a difference?), but are the 20v swaps as direct as the 4AGZE swaps? Or will I need new parts?

TL;DR: Will the 4AGE Electric harness work with the 4AGZE, because I know the body harness doesn't make too much of a difference. Do 20v Silvertops go in as easy as a 4AGZE if you have the correct wiring harness and ECU, or will I need different engine mounts and tranny bits?

toyotaspeed90 · 11-15-2009, 09:25 PM

the 4age and 4agze harnesses are not the same.... especially if your car is a pre 87 car.

Since it has a CAS... I would assume that it's a FWD setup. More than likely, it has a cut harness.... which is a good thing (in my opinion). A cut harness makes it easy for you to modify the harness to work with an aftermarket ECU.

The problem at hand is this -- your N/A harness is nowhere near the harness that the FWD gze's use. The plugs are not only different styles, but it uses a completely different ignition system 100%. Before you buy the engine, you should look to see what others have done.

The FWD transmissions can be easily modified to work in an MR2 (you will need an MR2 transmission to modify it easily). A 20V will not make the car anywhere near as fast as a GZE will.

DownhillMR2 · 11-15-2009, 10:23 PM

Okay, there was some confusion there. The 4AGZE is from an MR2. It's not from a FWD setup. I know I'll need an electrical wiring harness, but I was told the body harness should be largely the same, seeing as my car is an 89. Was I told wrong?

toyotaspeed90 · 11-16-2009, 08:27 PM

If the engine has a cam angle sensor and not a distributor, then it's not from an MR2. MR2 4agze's only had distributors.

However, these are the lowest powered versions of the 4agze

DownhillMR2 · 11-17-2009, 12:53 AM

Ah, didn't know that. That makes this a little bit more interesting. Thank you.

11-09-2009, 07:31 AM	#1 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	4AGE to 4AGZE Okay! So I finally decided on what I'm going to do, as the price of rebuilding the 4AGE is more than just picking up this catalog_product. With shipping it's 1500, and it's the ECU (Which I'm currently emailing them about to find whether or not it includes the harness. One would think it would, but you never know!), transmission, and of course the motor. So, my questions are as follow: 1. If the harness is included, should it be cut, what will need to be done? Why is an uncut harness superior? 2. Is the price decent. I could pick up a 3SGTE for 400$ more, but I don't know nearly as much about those swaps. Would it be worth it? 3. If I do do the 3S swap, would I also need the shafts?

11-15-2009, 05:00 PM	#8 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	So, new question. The GZE I'm picking up to swap doesn't come with a wiring harness. Can the N\A wiring harness be used with the 4AGZE ECU? Or am I going to have to shell out and find a 4AGZE wiring harness? The site's saying it comes with the following: • Complete Motor - Block - Head - Intake Manifold - Exhaust Manifold - Sensors - Fuel Rail - Injectors - Cam Angle Sensor - Throttle Body - Alternator - Starter - Ignition Wires - Pulleys - Supercharger • 5-Speed Transmission • Computer(ECU) • Intercooler What all else am I going to need? I'm going to re-use my water pump, but will I need a new timing belt also? I know I'll need an ignitor. Is it recommended to upgrade the fuel pump as well? This may sound dumb, but I've never had a supercharged car, does the oil pan need to be tapped like with a turbo setup? My other question is, I found this: JDM Engine - JDM Motors - JDM Parts - JDM Transmission - Honda Cars, Nissan, Subaru, Mazda, Toyota - A 20v Silvertop with the ECU\Harness\Transmission, but the site is saying it's a FWD transmission (Don't know if that makes a difference?), but are the 20v swaps as direct as the 4AGZE swaps? Or will I need new parts? TL;DR: Will the 4AGE Electric harness work with the 4AGZE, because I know the body harness doesn't make too much of a difference. Do 20v Silvertops go in as easy as a 4AGZE if you have the correct wiring harness and ECU, or will I need different engine mounts and tranny bits? Last edited by DownhillMR2; 11-15-2009 at 06:03 PM..

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11-09-2009, 08:16 AM	#2 (permalink)
mr3 unskilled Join Date: Jun 2008 Location: Plymouth Mtg, Pa Posts: 2,408 Thanks: 24 Thanked 98 Times in 93 Posts iTrader Rating: (7/100% )	4agze swap would be way easier and cheaper than a 3s. Use your c52 stock transmission with the 4agze so you don't need sc axles. You are going to need to do a few wires if I'm not mistaken. The supercharger light on the dash and the octane level switch. The body harness should match up but I never did the swap yet. I would figure 1500 for everything. That's what I did with my 20v swap and I'm close to that but it takes time. I'm now 2 months delayed because stuff comes up. Once my 20v is running I'm going to think about sc on my 87 daily.

11-09-2009, 08:28 AM	#3 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Hm.. What's an octane level switch? Do you mean like a change, or a physical 'switch'? And is the S/C light absolutely required? I don't really mind being alerted by it, but if I don't have to do it, I won't. Wouldn't a boost gauge be doing the same thing, effectively?

11-10-2009, 04:13 AM	#4 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Good thing i've decided on the swap. Coming home tonight, my check engine light came on, and I couldn't do anything about it. It went off about 15 minutes later, and when I got home, I got out of the car and turned around and my engine was lightly smoking. Looks like it just overheated, thankfully. Gonna do a coolant swap and air check tomorrow.

11-10-2009, 09:06 PM	#5 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	So, a new question: After I'm done installing the new motor, I plan on keeping and completely rebuilding the stock 4AGE. I'm going to do the internals first, and I need to know if anyone has purchased pistons, valves, cams, etc online from a reliable company, or do I need to go through Toyota for new internals?

11-10-2009, 11:01 PM	#6 (permalink)
mr3 unskilled Join Date: Jun 2008 Location: Plymouth Mtg, Pa Posts: 2,408 Thanks: 24 Thanked 98 Times in 93 Posts iTrader Rating: (7/100% )	Someone just posted a thread on parts for the entire rebuild. There is no kit out there but you can buy the parts you need from Toyota.

11-11-2009, 03:22 AM	#7 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Ah, thanks. I'll look for it.

11-15-2009, 09:25 PM	#9 (permalink)
toyotaspeed90 No Skills Join Date: Jun 2006 Location: Bellingham, WA Posts: 2,407 Thanks: 0 Thanked 149 Times in 144 Posts My Google Map iTrader Rating: (0/0% )	the 4age and 4agze harnesses are not the same.... especially if your car is a pre 87 car. Since it has a CAS... I would assume that it's a FWD setup. More than likely, it has a cut harness.... which is a good thing (in my opinion). A cut harness makes it easy for you to modify the harness to work with an aftermarket ECU. The problem at hand is this -- your N/A harness is nowhere near the harness that the FWD gze's use. The plugs are not only different styles, but it uses a completely different ignition system 100%. Before you buy the engine, you should look to see what others have done. The FWD transmissions can be easily modified to work in an MR2 (you will need an MR2 transmission to modify it easily). A 20V will not make the car anywhere near as fast as a GZE will.

11-15-2009, 10:23 PM	#10 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Okay, there was some confusion there. The 4AGZE is from an MR2. It's not from a FWD setup. I know I'll need an electrical wiring harness, but I was told the body harness should be largely the same, seeing as my car is an 89. Was I told wrong?

11-16-2009, 08:27 PM	#11 (permalink)
toyotaspeed90 No Skills Join Date: Jun 2006 Location: Bellingham, WA Posts: 2,407 Thanks: 0 Thanked 149 Times in 144 Posts My Google Map iTrader Rating: (0/0% )	If the engine has a cam angle sensor and not a distributor, then it's not from an MR2. MR2 4agze's only had distributors. However, these are the lowest powered versions of the 4agze

11-17-2009, 12:53 AM	#12 (permalink)
DownhillMR2 No Skills Join Date: Oct 2009 Posts: 36 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Ah, didn't know that. That makes this a little bit more interesting. Thank you.