Imprezer

iTrader: (9)

I spent the last two days doing research on the motor I got to mess around with.

The engine is EJ207DW4ER-026
The heads are LHS20V and RHS20V
The ECU is AH970

BUT...

No red intake pipe.
VF30 turbo.
STi optional oil temp/pressure adapter under the oil filter

Based on the ECU, it is a V7 STi RA Spec C
Based on the engine code, it is V7 STi RA Spec C, limited, or S202

But why VF30?
And it cannot be S202, since there is no red intake pipe
And, why is there STi oil temp/press adapter (of course, it could have been added after, but some STi came with it, so it could be a clue)

In terms of the heads, I am confused.

What do you guys know about it?

Imprezer

iTrader: (9)

Oh yeah, I promise you all I will get to the bottom of this and will make a complete run down on all this mumbo jumbo.

Kostamojen

iTrader: (2)

Shoot, my two EJ identification links arent updated for newer motors...

But I did find some info via google.

MJU1983

RA Spec C Limited Alex.

Maybe it will make more power than your Axis motor, muwahahaha

Kostamojen

iTrader: (2)

Are there any other markings on the heads?

Imprezer

iTrader: (9)

Yeah, I saw that.

According to that it is S202 engine. But then again, where is the red pipe? Why is VF30 there?

Hehe, this motor is not to replace the Axis monster motor. I decided to get rid of TEC III and in order to run OEM/STi ECU again, I have to re-wire the car (again) as I have removed my COMPLETE car harness from the car. And, after that, I am sure I will need to do some troubleshooting. And, I dont want to troubleshoot on the 10k motor.

After the car is re-wired, I will use the JDM motor for a while. Plus, I gotta get the Axis motor o-ringed. Then, I will use the AXIS and use the JDM one in my Legacy.

Imprezer

iTrader: (9)

Lhs20v 006
Rhs20v 008

Kostamojen

iTrader: (2)

Got some more info:

Imprezer

iTrader: (9)

Hmm, based on my turbo then, it could be regular STi, STi Limited.

Cannot be true.

Kostamojen

iTrader: (2)

Ok, the 006/008 = RA Spec C, but yes, the intake manifold/turbo is VERY confusing...

qwk_wrx

iTrader: (4)

still a bad *** engine none the less...

Imprezer

iTrader: (9)

Ok, did some more research and with huge help from Yohei (gogogo) I found out the following.

First some background info on GDB STi's in Japan.

The GDB's went through A ~ E type. A being the first one when it was introduced as MY01.

GDB A-revision, they had the following STi's:

STi -- EJ207DW3CR (VF30)
STi Type RA -- EJ207DW3CJ (Same as regular STi, no AC, no power options, etc, VF30)

As you can see, the only difference is the last letter. And, I know that the engines were the same, besides the Type RA not having the AC there. So, my conclusion is that R= AC, J=NO AC.

GDB B-revision, they had the following STi's:

STi -- EJ207DW4CR
STi Prodrive Style -- EJ207DW4CR (Same as regular STi + added options)
STi Type RA Spec C -- EJ207DW4EJ (VF34, Spec C motor)
STi Limited -- EJ207WD4ER (same as STi Type RA Spec C + AC, power windows, VF30)
S202 -- EJ207DW4ER (Same as STi Type RA Spec C + Red intake hoses, special ECU, oil cooler, exhaust, VF34)

GDB C-revision, they had the following STi's:

STi
STi Spec C (No longer called Type RA Spec C)
STi Limited

GDB D-revision, they had the following STi's:

STi
STi Spec C
STi V-Limited (Same as Limited, but in the year when Subaru wins WRC, Limited becomes V-Limited)

GDB E-revision, they had the following STi's:

STi
STi Spec C
WR Limited

I am still working on the C~E revisions and will post this info soon. I did ID my motor by now, hehe.

My EJ207DW4ER is MY02 Subaru Impreza WRX STi Limited engine. Which is basically Type RA Spec C motor w/ AC. It is not a S202 like I was hoping, but it does not matter. The only difference would be the ECU, Red Intake pipe and VF34 instead of VF30 I got. The long block is identical. Weee-haaa!

Kostamojen

iTrader: (2)

Excellent! I figured the long block was the bestest, but the turbo + paint job isnt

BOXER4

sounds like you have a very interesting motor.........did it actually come assembled like you received it?.........on the actual block, on the back side where the transmission usually meets the block on top, there should be a serial number of some sort....does it start with a "T", "R", etc.......also, did those heads come with that engine....."LHS20V and RHS20V"...usually SPEC C's come with "RHC" letters on the right head......also that ECU "AH970" is a Limited ECU with 320hp. the "AG970" is SPEC C......" AG971" is suppose to be the s202 sport ECU......

just some more info from my vault of useless info....

Imprezer

iTrader: (9)

Yep. It came like that.

As I found out, the head markings don't really have anything to do with it. Some are RHC and LHC, some are LHS20V and RHS20V. Some are mix and match.

I will look up the serial # tommorow. Why? What will that tell you?

Yeah, my AH970 is STi Limited.

STi Limited is basically a Spec C with AC and some other "power" options like windows and mirrors. And, it comes with VF30, so my motor is STi Limited for sure. Which is still a Spec C motor. Since it is going to be retuned anyways, I don't care if it is S202 or not. Engine is the same.