Late EJ20G throttle body pics needed

GGSimpreza · 06-26-2012, 10:10 AM

Hey guys I need pics of a late EJ20G throttle body. The motor I just bought has an EJ20G engine code on the timing cover, but doesn't look like it. I need to know how to wire this thing for my swap, and the throttle body looks like a K to me. Help?

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RallyColtTurbo · 06-26-2012, 10:20 AM

"Late" EG20Gs are wired like Ks.

The coil on the manifold marks yours as a "Late" (3-plug ECU). Early ones had the COPs.

If you need the early throttlebody (4 plug ECU) then there have been a few folks to flip an early TB and add a small spacer to mount it on the late (K-style) intake manifold.

GGSimpreza · 06-26-2012, 10:22 AM

I got this from Tiger JDM with an Z5 ecu, which is a 4 pin G ecu. I should get them to ship me a different ecu then?

GGSimpreza · 06-26-2012, 10:35 AM

I'd rather have the 280 HP EJ20k ecu (the 6S I think?) if I can.

RallyColtTurbo · 06-26-2012, 11:59 AM

I, personally, like the early stuff because Rob has an off the shelf, tested, and trusted tune for them.

IIRC, the 280HP ECUs have a hard time with our gas.

Do you have a harness also? If so, is it for a 3 or 4 plug ECU? You might need a 4 plug/COP motor instead?

GGSimpreza · 06-26-2012, 01:57 PM

I have a Z5 ECU but I'm gonna get them to send me a 6S or 75 cause the k wiring can't run off of a Z5, correct?

Also, I have access to 93 octane all over, not sure if that makes a diference.

Marnix · 06-26-2012, 04:02 PM

You need a 3-plug ECU to run that engine. If it has a TD04 turbo, grey top injectors and a purple label MAF you need either a 2S (WRX Wagon M/T) or 4W (Forester Turbo M/T). If it has a VF-series turbo, yellow top injectors and an orange label MAF you need either a 1S (WRX) or 6S (WRX STI) ECU. The STI ECU runs a bit more midrange boost but power levels are the same (280 PS @ 6500 rpm).

Marnix · 06-26-2012, 04:03 PM

I now see the engine has a flex plate so it's definately got a TD04 and grey top injectors (at least that is how it left the factory).

GGSimpreza · 06-26-2012, 04:11 PM

Quote:

Originally Posted by Marnix

You need a 3-plug ECU to run that engine. If it has a TD04 turbo, grey top injectors and a purple label MAF you need either a 2S (WRX Wagon M/T) or 4W (Forester Turbo M/T). If it has a VF-series turbo, yellow top injectors and an orange label MAF you need either a 1S (WRX) or 6S (WRX STI) ECU. The STI ECU runs a bit more midrange boost but power levels are the same (280 PS @ 6500 rpm).

I was under the impression that I could run any 3 plug ecu. I understand the 6S would run best with yellow top injectors, but I thought it can run on any car with a 3 plug ecu. Am I correct?

Marnix · 06-27-2012, 04:03 AM

No, the EJ20K ECUs run bigger injectors and a bigger MAF. When mixing these up driveabilty will be quite poor indeed.

GGSimpreza · 06-27-2012, 09:42 AM

I can find these injectors a lot of places, but where would I find this MAF?

I'm sure the 6S is a more aggressive tune, can I plug it up just so I can drive the car, and pick up the injectors and MAF in the meantime?

rob · 06-27-2012, 12:57 PM

In general you need to match the ECU to the injector size and MAF version it expects. Otherwise you are asking for trouble.

Besides that, your motor has a CR of 9:1. If you try to run an ECU meant for high octane AND 8:1 engine, it certainly will not last long.

-Rob

GGSimpreza · 06-27-2012, 06:25 PM

Thanks Rob, I'm getting a 2S for it. Problem solved!

i_c_the_light · 06-28-2012, 02:35 AM

So what's the power output of the forester 20G?

GGSimpreza · 06-28-2012, 09:51 AM

Quote:

Originally Posted by i_c_the_light

So what's the power output of the forester 20G?

Depends on what version you're talking about. Look up what ECU matches the motor you're asking about, and then Google Rob's EJ20G ECU list. It includes power and boost levels and stuff.

i_c_the_light · 06-28-2012, 05:47 PM

Quote:

Originally Posted by GGSimpreza

Depends on what version you're talking about. Look up what ECU matches the motor you're asking about, and then Google Rob's EJ20G ECU list. It includes power and boost levels and stuff.

I'm on my phone, it'll make me rage if I attempt that. Let's say 4W ECU.

trinistyles · 06-28-2012, 08:24 PM

Here is my 1c,
http://forums.nasioc.com/forums/show....php?t=2360544

Marnix · 06-29-2012, 06:32 AM

Late EJ20G in Forester and Impreza WRX Wagon made 250 PS. Both are high compression engines (9.0:1).

I have a 4W ECU available should you be interested.

i_c_the_light · 06-29-2012, 07:31 PM

Quote:

Originally Posted by Marnix

Late EJ20G in Forester and Impreza WRX Wagon made 250 PS. Both are high compression engines (9.0:1).

I have a 4W ECU available should you be interested.

Awesome thanks.

I live in New Zealand so most of the JDM stuff is accessible to me.

06-26-2012, 10:10 AM	#1
GGSimpreza Scooby Newbie Member#: 291739 Join Date: Aug 2011 Location: Harrisonburg, VA Vehicle: 99 Impreza RS Silver Milage	Late EJ20G throttle body pics needed Hey guys I need pics of a late EJ20G throttle body. The motor I just bought has an EJ20G engine code on the timing cover, but doesn't look like it. I need to know how to wire this thing for my swap, and the throttle body looks like a K to me. Help? * Registered users of the site do not see these ads.

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06-26-2012, 10:20 AM	#2
RallyColtTurbo Scooby Specialist Member#: 16819 Join Date: Mar 2002 Chapter/Region: SCIC Location: Lake Elsinore, CA Vehicle: 2002 MBP WRX, '98 OB Three Gen 1 Legacy Turbos	"Late" EG20Gs are wired like Ks. The coil on the manifold marks yours as a "Late" (3-plug ECU). Early ones had the COPs. If you need the early throttlebody (4 plug ECU) then there have been a few folks to flip an early TB and add a small spacer to mount it on the late (K-style) intake manifold.

06-26-2012, 10:22 AM	#3
GGSimpreza Scooby Newbie Member#: 291739 Join Date: Aug 2011 Location: Harrisonburg, VA Vehicle: 99 Impreza RS Silver Milage	I got this from Tiger JDM with an Z5 ecu, which is a 4 pin G ecu. I should get them to ship me a different ecu then?

06-26-2012, 10:35 AM	#4
GGSimpreza Scooby Newbie Member#: 291739 Join Date: Aug 2011 Location: Harrisonburg, VA Vehicle: 99 Impreza RS Silver Milage	I'd rather have the 280 HP EJ20k ecu (the 6S I think?) if I can.

06-26-2012, 11:59 AM	#5
RallyColtTurbo Scooby Specialist Member#: 16819 Join Date: Mar 2002 Chapter/Region: SCIC Location: Lake Elsinore, CA Vehicle: 2002 MBP WRX, '98 OB Three Gen 1 Legacy Turbos	I, personally, like the early stuff because Rob has an off the shelf, tested, and trusted tune for them. IIRC, the 280HP ECUs have a hard time with our gas. Do you have a harness also? If so, is it for a 3 or 4 plug ECU? You might need a 4 plug/COP motor instead?

06-26-2012, 01:57 PM	#6
GGSimpreza Scooby Newbie Member#: 291739 Join Date: Aug 2011 Location: Harrisonburg, VA Vehicle: 99 Impreza RS Silver Milage	I have a Z5 ECU but I'm gonna get them to send me a 6S or 75 cause the k wiring can't run off of a Z5, correct? Also, I have access to 93 octane all over, not sure if that makes a diference.

06-26-2012, 04:02 PM	#7
Marnix Scooby Specialist Member#: 51480 Join Date: Dec 2003 Chapter/Region: International Location: The Netherlands Vehicle: 1984 AM5, 1994 BC4, 2010 BR5	You need a 3-plug ECU to run that engine. If it has a TD04 turbo, grey top injectors and a purple label MAF you need either a 2S (WRX Wagon M/T) or 4W (Forester Turbo M/T). If it has a VF-series turbo, yellow top injectors and an orange label MAF you need either a 1S (WRX) or 6S (WRX STI) ECU. The STI ECU runs a bit more midrange boost but power levels are the same (280 PS @ 6500 rpm).

06-26-2012, 04:03 PM	#8
Marnix Scooby Specialist Member#: 51480 Join Date: Dec 2003 Chapter/Region: International Location: The Netherlands Vehicle: 1984 AM5, 1994 BC4, 2010 BR5	I now see the engine has a flex plate so it's definately got a TD04 and grey top injectors (at least that is how it left the factory).

06-27-2012, 04:03 AM	#10
Marnix Scooby Specialist Member#: 51480 Join Date: Dec 2003 Chapter/Region: International Location: The Netherlands Vehicle: 1984 AM5, 1994 BC4, 2010 BR5	No, the EJ20K ECUs run bigger injectors and a bigger MAF. When mixing these up driveabilty will be quite poor indeed.

06-27-2012, 09:42 AM	#11
GGSimpreza Scooby Newbie Member#: 291739 Join Date: Aug 2011 Location: Harrisonburg, VA Vehicle: 99 Impreza RS Silver Milage	I can find these injectors a lot of places, but where would I find this MAF? I'm sure the 6S is a more aggressive tune, can I plug it up just so I can drive the car, and pick up the injectors and MAF in the meantime?

06-27-2012, 12:57 PM	#12
rob n00b Moderator Moderator Member#: 811 Join Date: Jan 2000 Location: WA Vehicle: 2000 RS-Ej20G It tastes like burning	In general you need to match the ECU to the injector size and MAF version it expects. Otherwise you are asking for trouble. Besides that, your motor has a CR of 9:1. If you try to run an ECU meant for high octane AND 8:1 engine, it certainly will not last long. -Rob

06-27-2012, 06:25 PM	#13
GGSimpreza Scooby Newbie Member#: 291739 Join Date: Aug 2011 Location: Harrisonburg, VA Vehicle: 99 Impreza RS Silver Milage	Thanks Rob, I'm getting a 2S for it. Problem solved!

06-28-2012, 02:35 AM	#14
i_c_the_light Scooby Guru Member#: 88618 Join Date: Jun 2005 Chapter/Region: SCIC Location: New Zealand Vehicle: 1994 Legacy "The Silver Slug"	So what's the power output of the forester 20G?

06-28-2012, 08:24 PM	#17
trinistyles Scooby Specialist Member#: 71627 Join Date: Sep 2004 Chapter/Region: Tri-State Location: Ny/Nj/Li Vehicle: 0205 Vf39 Wrx/Fz XS Wbp/silver	Here is my 1c, http://forums.nasioc.com/forums/show....php?t=2360544

06-29-2012, 06:32 AM	#18
Marnix Scooby Specialist Member#: 51480 Join Date: Dec 2003 Chapter/Region: International Location: The Netherlands Vehicle: 1984 AM5, 1994 BC4, 2010 BR5	Late EJ20G in Forester and Impreza WRX Wagon made 250 PS. Both are high compression engines (9.0:1). I have a 4W ECU available should you be interested.