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Old 09-15-2012, 12:37 AM   #26
lukeskywrx
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Quote:
Originally Posted by N8WRX View Post
Not going to argue or stand and be called a liar from people who wont do there foot work so if you would like true, backed, evidence supported information on the EJ207 engines no matter make or model PM me, Thanks.

PS: look up what extrude honing is

/Thread for me
Familiar with extrusion honing, I never stated the finishing method on the 207 heads. There was likely some kind of finishing as the casting lines are smooth, they are just not ground down. I was just pointing out there is specifically no "hand port and polish" on the spec-C as rumored based on my observations, the STI and specC heads are the same for v9. The finish on both heads is a smoothed textured surface likely from abrasive media. Believe me, I wanted my spec-C motor to have hand ported heads however I cannot convince myself they are, or that they are different from the regular sti v9 heads. And I do agree the 207 heads have a different finish compared to the us 205 and 255/257.

If you have "evidence supported" information on all the JDM motors I doubt anyone would call you a liar. Everything now is just observation on a very limited sample group. Someone makes a claim and it is eventually proven or disproven, some claims are spread as fact before being vetted and that is bad for the community. Saying the 207 heads are honed from the factory is one thing but a hand port and polish job is something else, I am arguing against the latter.
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Last edited by lukeskywrx; 09-15-2012 at 12:47 AM.
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Old 09-15-2012, 08:03 AM   #27
Vlad
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+1
This is not at all dramatic, nobody called you a liar and nobody discussed the factory machining processes for the heads.
This was about factory hand porting and polishing for the Spec C.

You can choose to participate, to share your information, this is the whole point of the forum. You have information? share it!
Let's see what you got, let's discuss it and improve everybody's knowledge, including mine.
The forum is an open place. Sooner or later, the information becomes available.

Last edited by Vlad; 09-15-2012 at 08:12 AM.
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Old 09-15-2012, 01:37 PM   #28
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Does any one know if I'll be able to use the downpipe I have on my US wrx with my jdm motor?
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Old 09-15-2012, 01:53 PM   #29
666stars
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Originally Posted by Coldcutt View Post
Does any one know if I'll be able to use the downpipe I have on my US wrx with my jdm motor?
With the V7 yea
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Old 09-17-2012, 08:05 PM   #30
Coldcutt
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Just received my motor. I have some concerns about the wiring harness that came with the motor. Hoping some of you guys can help?

On the JDM harness, the wiring to the dash has been cut and one of the wires coming from the alternator (not the wires with the brown and white connectors).

Can i still use the harness that came with the JDM motor, and just use the wiring from dash and alternator from my USDM WRX? Or could I use my entire USDM wiring harness and just add in the AVCS wiring harness I ordered from IA Performance with the JDM ECU?

Or am I seriously ****ed and need to order an entire new JDM harness?

Please, any help would be greatly appreciated, cars been sitting for a long time and I really want to get her up and running! I can include pictures if that would help.

Thanks in advance.
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Old 09-17-2012, 08:11 PM   #31
Vlad
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Your engine should have come with an un-cut engine wiring harness. This ends with connectors on the sides, above the valve covers, that mate into your car's engine bay harness.
If you have those, then you can re-use the rest.
Post a photo of the area of concern.
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Old 09-17-2012, 09:10 PM   #32
Coldcutt
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Alright heres some pictures, if you need more ill take some.

I believe this is the part that has been cut that goes to the dash:







And these are the wires that have been cut that come from the alternator:





Hopefully these photos actually show up.. i havent posted any photos in a while haha.
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Old 09-17-2012, 09:11 PM   #33
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one photo didnt work, sorry.
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Old 09-17-2012, 09:17 PM   #34
Vlad
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you can't use the firewall harness that goes to the dashboard, even if you wanted to. That locates the cluster on the right hand side.

It is not important that it has been cut that way and you will be able to sell it even cut anyway.

The alternator harness you should be able to re-use the WRX one.

There are those square connectors like the brown and black one, those are the important ones, there should be a corresponding one on the left side as well (can't remember this minute if there are 2 on the left)

Also, you may be able to sell the cut alternator harness as well.
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Old 09-17-2012, 09:32 PM   #35
Coldcutt
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So what you're saying is I'm SOL for the dashboard harness? What do you recommend I do?
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Old 09-17-2012, 09:34 PM   #36
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the current USDM dashboard harness will remain in use and will do fine. You are not SOL unless you were planning to convert to right hand drive.
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Old 09-17-2012, 09:36 PM   #37
Coldcutt
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Alright awesome I was worried there for a second. So what you're saying is I can make the swap work with what I have?
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Old 09-17-2012, 09:37 PM   #38
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Quote:
Originally Posted by Coldcutt
So what you're saying is I'm SOL for the dashboard harness? What do you recommend I do?
I am learning about this stuff too. I could be wrong. I think you can use your dash board harness. Unless your going right hand drive the jdm one is useless.

Last edited by BugEyeBetty; 09-17-2012 at 09:51 PM.
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Old 09-17-2012, 09:38 PM   #39
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Ha ha Vlad beat me to it. Im glad i wasnt wrong though.
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Old 09-17-2012, 09:46 PM   #40
Coldcutt
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Awesome man, appreciate your help! I was about 95% sure it would work, but needed some second opinions.
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Old 09-17-2012, 09:47 PM   #41
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You are perfectly fine. Get rid of those cut wired harness'. All you need it the engine harness.
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Old 09-17-2012, 09:48 PM   #42
Coldcutt
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Can I just wrap them in conduit or electrical tape??.... Or should I pull them out of the harness? Sorry about all the questions guys
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Old 09-17-2012, 10:02 PM   #43
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Those wiring harness' are seperate and will be able to be pulled away and trashed. They are exactly what you have in your car now. The engine harness exiting on each side of the motor (white and brown connectors) is what you will keep.
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Old 09-17-2012, 11:03 PM   #44
Vlad
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Heeeey, I'll take the cut alternator harness, don't trash it, ok?
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Old 09-19-2012, 05:44 PM   #45
Coldcutt
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Sounds good man, I'll let you know.
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Old 09-20-2012, 02:56 PM   #46
Coldcutt
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Are there any differences in basic maintenance items from the ej205-ej207? Fuel filter, coolant, oil etc??
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Old 09-20-2012, 03:36 PM   #47
Vlad
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Spark plugs are different and timing belt maintenance interval is shorter, depending which belt you use.
Take a look at my intro thread maybe will answer other questions you may have.

http://forums.nasioc.com/forums/show....php?t=2385141
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Old 09-20-2012, 04:22 PM   #48
Coldcutt
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Thanks Vlad thats a good thread! What year sti timing belt should I buy for my v7? 04?
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Old 09-20-2012, 05:58 PM   #49
Vlad
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The part number is different than USDM, so your question falls into the category of what would still work and be not OEM.
I think the answer is in the 207 owner's thread.

With this said, I used the Sti pink belt and many use the gates blue belt.

Do not forget however that Japanparts has some decent prices and right now have a sale on OEM.

An example: Sti wagon grill for bugeye prepainted with Sti badge for $250 or so...

Why not buy the belt your engine calls for, if it's not that expensive...
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Old 09-30-2012, 05:24 PM   #50
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nice informative thread, now...I've searched around, but can't find any answers...

will ej205 cams fit in the 207 heads? would I need to machine anything?
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