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Old 10-09-2012, 08:55 PM   #4476
JRsleeper
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Did you even read post 4462 from Johnfelstead

Edit: more info is being found and brought to our attention. Lots of reading do.
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Last edited by JRsleeper; 10-10-2012 at 06:25 AM.
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Old 10-09-2012, 08:56 PM   #4477
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Quote:
Originally Posted by WRick
don't get hyped kids, It's still a subaru, and WILL blow on you eventually
Lol not aware of a performance engine that won't eventually blow
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Old 10-09-2012, 09:01 PM   #4478
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Just trawled through the homologation sheets, and the euro spec sheets as some things didnt add up.

It apears the UK STi had Forged pistons on all the 2.0 litre engines, so MY03/04/05 are forged.

JDM STi is forged upto MY02, MY03/04/05 is Hypercast.

So i was partly correct and partly wrong. It explains why i was sure all the STi8 pistons were forged.

The info is in the homologation sheets i linked to earlier, with the forged piston weighing 540g, the hypercast 568g

I would think the reason the UK STi kept it's forged pistons was down to them having to run on 95RON fuel, where as in Japan they are specced for 100RON fuel.

I'll edit my info.
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Old 10-09-2012, 09:02 PM   #4479
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According to this the motor in my car is a my03 sti with cast pistons . EJ207DW5CR
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Old 10-09-2012, 09:03 PM   #4480
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You just let down a TON of people lol jk

I have a v9/v10. I wasn't worried. :-)
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Old 10-09-2012, 09:09 PM   #4481
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lol yeh, but at least some more info is out there.

Off to bed now, got to map my MY05 JDM STi tomorrow, 2.0 BAR and close to 500BHP all being well, and no, its not on stock pistons, Mahle 2618.
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Old 10-09-2012, 09:24 PM   #4482
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Quote:
Originally Posted by johnfelstead View Post
Just trawled through the homologation sheets, and the euro spec sheets as some things didnt add up.

It apears the UK STi had Forged pistons on all the 2.0 litre engines, so MY03/04/05 are forged.

JDM STi is forged upto MY02, MY03/04/05 is Hypercast.
European STI pistons 12006AB430 appears to be forged, but not the JDM 12006AC430.
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Old 10-09-2012, 10:06 PM   #4483
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Oh, It's a JDM STI?
Pretty close.

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Quote:
Originally Posted by 25rsti View Post
You just let down a TON of people lol jk

I have a v9/v10. I wasn't worried. :-)

I knew what I had before reading this page, I just didn't know I had a nitrided crank. I'm happy with that.
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Old 10-09-2012, 10:22 PM   #4484
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Like I said, the part number indicates the change, I even posted pictures, date of change, etc..

There is nothing wrong with the information we already have.

The homologation info is a welcome addition, I know I will spend time looking through that.

I think it's best to avoid confusion and keep the terminology the way we had it, as it stands newcomers keep getting confused on a daily basis with the basics, I'm sure the question "Is my V8 spec C with forged pistons?" is all but guaranteed to pop up for a while now.
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Old 10-09-2012, 10:37 PM   #4485
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Had this headache:


ended up with this:


Free AVCS harness
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Old 10-10-2012, 11:45 AM   #4486
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Which plugs are you guys running that are running E85? My tuner suggested not using 1 step colder because of the e85.
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Old 10-10-2012, 11:58 AM   #4487
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i ran 1 step colder when i put it on e85 for a week to run at the track. ran just fine. stock ones should work fine as well!

so John this threw ppl off before when i posted back on page 109 but here is my engine code.
ej207dg8cr
can not quite figure out what the DG stands for but i got a v8 ecu with the engine so it did not really matter the year. vf37 turbo. iat sensor under the mani. longrunner mani. seems pretty basic ej207 "v8" to me but the code i can not figure out.

edit, well after reading this post lol i gues hawkeye engine?
(change to New Age Bug Eye, NO reset of year field)
MY01 STi 7 - EJ207DW3CR (Forged)
MY02 STi 7 - EJ207DW4CR (Forged)
(change to Blob Eye / twin scroll, NO reset of year field)
MY03 STi 8 - EJ207DW5CR (Hypercast)
MY04 STi 8 - EJ207DW6CR (Hypercast)
MY05 STi 9 - EJ207DW7CR (Hypercast+Nitrided cross drilled crank)
(change to Hawk Eye, NO reset of year field)
MY06 STi 10 - EJ207DG8CR
MY07 STi 10 - EJ207DG9LE

does that include the hypercast + nitrided cross drilled crank??!! i cant get a camera in there to get a pic but will try with the womans camera when she gets home. i double checked that is what the sticker said when i got the engine.
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Old 10-10-2012, 12:00 PM   #4488
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Well ya it'll run fine on E85 with 1 step colder, I ran it for years. But it's much more ideal to run on the normal heat range plugs, especially in the winter. I was more looking for the proper plug to run in the standard heat range. Would it just be the same plugs the EJ205 runs? That would be BKR6EIX correct?
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Old 10-10-2012, 12:08 PM   #4489
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Quote:
Originally Posted by Vlad View Post
I think it's best to avoid confusion and keep the terminology the way we had it, as it stands newcomers keep getting confused on a daily basis with the basics, I'm sure the question "Is my V8 spec C with forged pistons?" is all but guaranteed to pop up for a while now.
Maybe if you stick to what Subaru use, there wont be any confusion with the engine spec or the model year of the car, just a thought.

I've listed the engine codes for the year, so just by looking at those you can now say what is in the engine. If you insist on calling them a V* that doesn't actually mean anything and can span more than one year and spec it's bound to be confusing.

Just finished mapping, looks to be about 470BHP/490Lbft with the same spool as a VF37 but pulls hard to 8Krpm, 1.95BAR @ 3700rpm, which is nice.

We hit the limit of the MegaROM waste gate duty mid range, it will probably make 2.1BAR if we can get EcuTek to up the waste gate limit past 90%.

Makes for a properly quick road car, mid range torque and response at cruising speeds/rpm is very impressive, no stiring the gears required with this thing, which is what the twin scrolls should be all about.
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Old 10-10-2012, 12:14 PM   #4490
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Quote:
Originally Posted by WhiteBgeye02 View Post
i ran 1 step colder when i put it on e85 for a week to run at the track. ran just fine. stock ones should work fine as well!

so John this threw ppl off before when i posted back on page 109 but here is my engine code.
ej207dg8cr
can not quite figure out what the DG stands for but i got a v8 ecu with the engine so it did not really matter the year. vf37 turbo. iat sensor under the mani. longrunner mani. seems pretty basic ej207 "v8" to me but the code i can not figure out.

edit, well after reading this post lol i gues hawkeye engine?
(change to New Age Bug Eye, NO reset of year field)
MY01 STi 7 - EJ207DW3CR (Forged)
MY02 STi 7 - EJ207DW4CR (Forged)
(change to Blob Eye / twin scroll, NO reset of year field)
MY03 STi 8 - EJ207DW5CR (Hypercast)
MY04 STi 8 - EJ207DW6CR (Hypercast)
MY05 STi 9 - EJ207DW7CR (Hypercast+Nitrided cross drilled crank)
(change to Hawk Eye, NO reset of year field)
MY06 STi 10 - EJ207DG8CR
MY07 STi 10 - EJ207DG9LE

does that include the hypercast + nitrided cross drilled crank??!! i cant get a camera in there to get a pic but will try with the womans camera when she gets home. i double checked that is what the sticker said when i got the engine.
Your engine is from the first hawkeye, so it is on my list as MY06 STi 10.

The engines from MY05 onwards in my list all have the nitrided cross drilled crank, uprated rods and hypercast pistons, they also came with the AIT temp sensor in the plenum. If it has a VF37 then it will be from the normal STi, not the Spec C.
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Old 10-10-2012, 12:16 PM   #4491
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Quote:
Originally Posted by johnfelstead View Post
Maybe if you stick to what Subaru use, there wont be any confusion with the engine spec or the model year of the car, just a thought.

I've listed the engine codes for the year, so just by looking at those you can now say what is in the engine. If you insist on calling them a V* that doesn't actually mean anything and can span more than one year and spec it's bound to be confusing.

Just finished mapping, looks to be about 470BHP/490Lbft with the same spool as a VF37 but pulls hard to 8Krpm, 1.95BAR @ 3700rpm, which is nice.

We hit the limit of the MegaROM waste gate duty mid range, it will probably make 2.1BAR if we can get EcuTek to up the waste gate limit past 90%.

Makes for a properly quick road car, mid range torque and response at cruising speeds/rpm is very impressive, no stiring the gears required with this thing, which is what the twin scrolls should be all about.
I missed which turbo you ended up going with.
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Old 10-10-2012, 12:42 PM   #4492
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Quote:
Originally Posted by simon021 View Post
I missed which turbo you ended up going with.
I've been doing some development work with Owen Developments/Chevron Motorsport to produce a new Twin Scroll Turbo that retains the stock spool but provides much higher power/torque figures. I've never been overly impressed with the alternatives, they spool too slow losing what the TS is all about. I think they have come up with a cracking piece of kit now.
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Old 10-10-2012, 12:46 PM   #4493
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Quote:
Originally Posted by Vlad View Post
Like I said, the part number indicates the change, I even posted pictures, date of change, etc..

There is nothing wrong with the information we already have.

The homologation info is a welcome addition, I know I will spend time looking through that.

I think it's best to avoid confusion and keep the terminology the way we had it, as it stands newcomers keep getting confused on a daily basis with the basics, I'm sure the question "Is my V8 spec C with forged pistons?" is all but guaranteed to pop up for a while now.
"Is my V8 spec C with forged pistons?"

That was my question and based on what he was posting, it was a legit one. It has nothing to do with being a new-comer. I was initially operating under the assumption that it was not forged, but he was providing some strong evidence to the contrary. This is why I asked him: to clarify his position which was very different from all the other sources I'd ever read. Hardly "basics".

While I am still a bit confused, John seemed to indicate that there ARE V8's with forged pistons depending on the market you got your EJ207 from.

I agree with John, we should really drop the V7, V8, V* thing as it really does not adequately describe or encompass the various models globally and the special iterations/changes.

Last edited by kpluiten; 10-10-2012 at 12:53 PM.
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Old 10-10-2012, 01:02 PM   #4494
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I think you're taking personally something that was not directed at you.
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Old 10-10-2012, 01:15 PM   #4495
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Quote:
Originally Posted by Vlad View Post
I think you're taking personally something that was not directed at you.
Partially taken personally since I was literally the last once to ask about a V8 Spec-C motor and what pistons it has , but that aside, John does have a point about not using version numbers. Perhaps this is sets some much of the confusion stems from.
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Old 10-10-2012, 01:15 PM   #4496
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So im in the middle of my swap into my bugeye. I just need to start it to check everything runs before my "warranty" expires.
im wondering if its safe to start it, not drive or rev it or anything with these conditions:

-The downpipe i have is the jdm one is too short, obviously. so itd be just dumping out the downpipe

-the fuel pump is a stock 02 wrx. walbro is on its way from rallysport

-the tune on the ECU is still for 100RAN or whatever they run in japan. i have a tank full of 91.

is it safe just to test start it up?
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Old 10-10-2012, 01:20 PM   #4497
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Quote:
Originally Posted by kpluiten View Post

While I am still a bit confused, John seemed to indicate that there ARE V8's with forged pistons depending on the market you got your EJ207 from.

I agree with John, we should really drop the V7, V8, V* thing as it really does not adequately describe or encompass the various models globally and the special iterations/changes.
There are, the UK/Euro cars kept the forged pistons until they went 2.5 litre. Post going 2.5 litre they also become hypercast, and the resultant engine failures on a large scale in the UK show that was a huge mistake!

I checked some pistons this morning from a failed MY03 JDM STi Spec C at a friends workshop, they were hypercast.

Apologies for confusing things a bit last night, but i think it's all pretty clear now and hopefully people can just look at their engine number sticker and see what they have.
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Old 10-10-2012, 01:24 PM   #4498
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If the sticker is missing or unreadable can you tell the engine DOB/version based on the serial stamped on the top of the short block by the starter?
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Old 10-10-2012, 01:25 PM   #4499
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Quote:
Originally Posted by PHruska View Post
So im in the middle of my swap into my bugeye. I just need to start it to check everything runs before my "warranty" expires.
im wondering if its safe to start it, not drive or rev it or anything with these conditions:

-The downpipe i have is the jdm one is too short, obviously. so itd be just dumping out the downpipe

-the fuel pump is a stock 02 wrx. walbro is on its way from rallysport

-the tune on the ECU is still for 100RAN or whatever they run in japan. i have a tank full of 91.

is it safe just to test start it up?
I wouldnt be worried, the fuel pump will flow enough fuel off load, the exhaust doesnt matter so long as you dont set fire to the car.

These engines are mapped for 100RON in Japan, that is the equivilent of 95.8 USA Octane. Running it off load on 91 USA Octane wont do any damage.
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Old 10-10-2012, 01:27 PM   #4500
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Quote:
Originally Posted by todeswalzer View Post
If the sticker is missing or unreadable can you tell the engine DOB/version based on the serial stamped on the top of the short block by the starter?
I dont think so.

If the plenum has a temperature sensor in it, then it is at least an MY05. If it doesnt then it's MY04 or earlier.
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