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Old 06-07-2019, 09:50 PM   #1
Mauled
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Default Looking to do an ej207 swap

Hi, i have a 2005 wrx with a jdm ej205. I want to swap the motor with an ej207.

My plan is to buy the motor first, swap it in, do timing belt and pulleys, spark plugs, fuel pump, and get it running with avcs and get it tuned. I currently have a IHI VF39 that was rebuilt with 6k on it. Should i swap that over to the ej207 or just run the turbo that comes with it?

Over time I am going to swap transmission, and get better brakes, etc but I plan on swapping in the motor first and just running a light tune around 280-300whp until i upgrade the rest of the car.

Eventually I want to get a bigger turbo, what would you guys recommend for someone looking to squeeze the most power out of a ej207? I want to make this a fun street car looking to run around 400-500hp if it's possible on this motor.

Do you guys think I should get the v7 v8 or v9? I have a Tsudo catless downpipe and a Borla s type exhaust, i'd like to keep using it if possible.

I've been researching this a lot lately, I know theres a lot of info already but I just wanted your guys opinions in 2019 on the best version ej207 to run.
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Old 06-07-2019, 11:17 PM   #2
D-Rodman
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Default Looking to do an ej207 swap

Iíve done two ej207 swaps into GD wagons. I have a ver7 right now on my 05 Saabaru, itís been running 100% reliable and uses no oil during 4,500-5,000 mile oil change intervals. I removed the original vf30 and installed a Blouch 18G XTR but removed that after 1200 miles because that type of power band didnít work for my daily driving habits. I settled on a VF48 and Iíve been pleased since. Iím running the ID850 injectors I originally installed for 18G, have a stock air box, Cobb turbo back exhaust, Cobb up pipe, Cobb 3 port boost controller, avcs enabled and custom tuned. I like the driving manners and classic Subie rumble. I had a ver 8 on an 02 wagon, that was on the stock twin scroll VF37, it was awesome. That setup had the stock pink fuel injectors, Tomei catless twin scroll down pipe and Borla Hush cutback, stock air box, avcs enabled and custom tuned. With the factory equal length header it had no rumble but sounded mean, I do miss it. It actually made more hp and more torque. More importantly, the midrange torque was noticeably stronger than the single scroll setup I have now. If I was looking to do another ej207 Iíd be looking for a low mile ver 9 motor, spec C ideally and keep the stock ball bearing VF36. Iíd get a Tomei down pipe again, run a 3 port boost controller, enable avcs and a proper tune. That would be a 300whp setup with about the same amount of torque. Iíd love that **** but Iím perfectly happy with my current setup. Iíve known of stock internal ej207 motors pushing the power you are looking for. I guess a big turbo and e85 is the easiest and safest way to get there. The Ver 7 motor did come with forged oem pistons but they are old motors now and finding good low mile engines is critical. My understanding is the ver 9 motor got many improvements over the ver 8 and ver 7. They do not have forged oem pistons but they donít seem to suffer from broken ring land failure like ej257 despite of the fact that the pistons are made using the same type materials and construction. The improved oiling is a significant factor on the ver 9 motors, so are the cylinder heads. A ver 9 would be my choice and what Iíd advice. Check the ej207 ownerís thread, there is excellent information there.
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Old 06-12-2019, 08:53 PM   #3
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Quote:
Originally Posted by Mauled View Post
Hi, i have a 2005 wrx with a jdm ej205. I want to swap the motor with an ej207.

My plan is to buy the motor first, swap it in, do timing belt and pulleys, spark plugs, fuel pump, and get it running with avcs and get it tuned. I currently have a IHI VF39 that was rebuilt with 6k on it. Should i swap that over to the ej207 or just run the turbo that comes with it?

Over time I am going to swap transmission, and get better brakes, etc but I plan on swapping in the motor first and just running a light tune around 280-300whp until i upgrade the rest of the car.

Eventually I want to get a bigger turbo, what would you guys recommend for someone looking to squeeze the most power out of a ej207? I want to make this a fun street car looking to run around 400-500hp if it's possible on this motor.

Do you guys think I should get the v7 v8 or v9? I have a Tsudo catless downpipe and a Borla s type exhaust, i'd like to keep using it if possible.

I've been researching this a lot lately, I know theres a lot of info already but I just wanted your guys opinions in 2019 on the best version ej207 to run.
`if you want to go big power, the best way to do it is with a 2.1, bascially is stroked out 2.0 use the v10 case and whatever big port heads you can find. right now my set up is a stroked out 205 with v9 heads tomei cams, and a 3067 spoolinator. I make power form about 3700 all the way to 8000 so its a pretty wide power curve. but yeah it all depends on what you want. You do have to understand that if you do go big turbo it will have to driven differently as anything below 3000 is really not going to make very good power. but once you get up there... hold on..

Just a side note if I were to do it all over again, I would do the hew garrett g25 660. its almost the best of both worlds small turbo spool with big power up to. if you are patient, killer bee is working on a kit for this turbo with a interal wastegate too.
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Old 07-21-2019, 11:50 AM   #4
Mauled
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I have enough money for an ej207 now and can probably get the 6 speed too. I'm debating on which version to buy still though, v7 v8 or v9? I want to make more power then what i'm making now which is 306whp on a non avcs ej205.

Do you guys think its worth it? I want to make around 500whp eventually lol.
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Old 07-21-2019, 12:15 PM   #5
subaru_gc8
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get a 8 some of the 9s were immobilized.. just causes more problems 500 is a lot for a 2.0. just saying. your going to need a huge turbo and your turbo wont start to make power til 5000 or later. just saying
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Old 07-26-2019, 08:51 PM   #6
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I did a few months comparison, and decided on the v9. They are all considerably different.

No regrets on mine, v7 is definitely really slick too!
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Old 07-27-2019, 01:08 PM   #7
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I got a v9 spec c. Small differences with v8 but figure better chances of lower mileage on it.
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Old 07-27-2019, 01:37 PM   #8
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Old 08-22-2019, 10:06 PM   #9
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Alright guys i'm going to settle on the v8.My wrx got totaled a couple weeks ago and got a check and now i'm buying a 05 wrx with no motor. I'm ordering the ej207 v8 this week. My question is will I have to get a new downpipe to fit my usdm exhaust? The 05 wrx is coming with an invidia exhaust.
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Old 08-22-2019, 10:56 PM   #10
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Quote:
Originally Posted by Mauled View Post
Alright guys i'm going to settle on the v8.My wrx got totaled a couple weeks ago and got a check and now i'm buying a 05 wrx with no motor. I'm ordering the ej207 v8 this week. My question is will I have to get a new downpipe to fit my usdm exhaust? The 05 wrx is coming with an invidia exhaust.
You'll need the v9 or aftermarket DP. If you want to run the twin scroll turbo that came on ej207 v8.
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Old 08-23-2019, 10:15 AM   #11
D-Rodman
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Default Looking to do an ej207 swap

https://www.importimageracing.com/pr...-sti-2002-2007

Tomei also sells a twin scroll down pipe for 02-07.
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Old 08-23-2019, 12:03 PM   #12
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Old 08-23-2019, 01:09 PM   #13
Mauled
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Ok i ordered the v8 with a v9 downpipe so it should fit. Will this timing belt and water pump kit work for it?

https://www.rallysportdirect.com/par...SABEgLXz_D_BwE
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Old 08-23-2019, 02:37 PM   #14
D-Rodman
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Thatíll work, you should consider using an oem belt tensioner instead of the Gates. Also, make sure the bolt for the narrow idler is long enough for your motor application.
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Old 09-05-2019, 11:09 PM   #15
Mauled
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Ok guys i got the ej207 v8. Put new timing belt, and got the motor installed into the car today. Was not easy at all but it's done.

There's a lot of hoses cut but tomorrow I'm going to try and get everything routed and wired and see what I'll have to order. Is there anyway to use a single scroll down pipe on this motor or will I have to use the Twin scroll down pipe?

I have a invidia exhaust, I'm not sure which one it is because i bought it with the car and i haven't really looked at it yet. I'll sell the down pipe if I can't use it and get something else.
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Old 09-06-2019, 02:08 AM   #16
D-Rodman
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Default Looking to do an ej207 swap

Kinugawa makes a part you can use to convert your existing single scroll down pipe to twin scroll.
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Old 09-09-2019, 10:34 PM   #17
Mauled
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Okay I have some questions. I'm looking to get 300-350whp to the wheels out of this car if i can. I almost have everything hooked up. just waiting on a air intake, a maf, and a few other things.

What mods would I need to get to 300-350whp, downpipe, injectors, fuel pump, what else?

How good is the v9 stock downpipe? I have a invidia dp but i'm not sure if i want to cut it up unless it is going to be easy and worth the money. Is that tomeika dp usdm length? I have an invidia n1 exhaust. Sorry I keep asking these questions I'm just not sure on what would be the easiest and or cheapest. I'd rather not have to get anything welded if I can. If the stock downpipe is good enough to reach around 300 then would it be better to buy other supporting mods?

I'm going to research the vf37 some more and see what kind of info I come up with. Would it be good for hitting 300?

Any advice on mods is appreciated. Your guys info has been helpful so far.
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Old 09-10-2019, 03:03 AM   #18
D-Rodman
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Default Looking to do an ej207 swap

The stock v9 down pipe will be restrictive, definitely get an aftermarket down pipe. Tomei makes a good one and Tomioka Racing as well that are reasonably priced because they are catless. They are USDM length down pipes. I had a ver 8 ej207 with the stock vf37 turbo and pink injectors. I had a Walbro 255 fuel pump, 3 port boost controller, Tomei down pipe and a Dyno tune by STi Mikey at EFI Logics that put 290whp and 304fpt on their heart breaker Dyno. If you want to get into that 300-350whp range you are looking at replacing the turbo, injectors, fuel pump, etc. A Blouch 1.5 should get you there, you can get it single or twin scroll. Iíd suggest going with 8cm to keep it livelier at lower rpmís. Injector Dynamics 1050 and whatever pump you prefer that will flow higher than stock. Having avcs enabled will be important also.
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Old 09-11-2019, 04:35 PM   #19
Mauled
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Ok i tried starting the car for the first time today. It cranks but wont start.

The fuel lines are primed.

Does the nss switch have to be switched for it to start? Its a 2005?

Any ideas?
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Old 09-11-2019, 06:45 PM   #20
Fierysun
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Quote:
Originally Posted by Mauled View Post
Ok i tried starting the car for the first time today. It cranks but wont start.

The fuel lines are primed.

Does the nss switch have to be switched for it to start? Its a 2005?

Any ideas?
Definitely confirm your NSS is not reverse polarity of the motor/ecu. Also check your crank sensor is fully plugged in
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Old 09-11-2019, 11:08 PM   #21
D-Rodman
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05 wrx body with 5 speed transmission will require inverting the nss at the ecu or change the nss. Vlad has that documented on the ej207 owner's thread.
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Old 09-12-2019, 10:11 AM   #22
Mauled
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I got it to start but it sputters and dies. I don't have a maf plugged in yet so i'm going to try that today if it comes in. I have 2 codes cam sensor position one and 2 (i guess because the avcs isn't plugged in yet), and also knock sensor code displaying. Can't recall the exact codes right now off the top of my head. The engine wont run for more then one second and sounds horrible and shakes. I hope it isn't the timing or worse, bent valves. I was extremely careful doing the timing belt and making sure all the marks lined up. I haven't switched the nss switch yet.

How many grounds are there? I see one going from the transmission to near the dogbone. and another big one coming off the wiring harness directly to the motor. Is there anymore?
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Old 09-12-2019, 12:13 PM   #23
Mauled
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Ok mass airflow sensor fixed it, it runs good now. Any ideas what these two connectors go to?

https://ibb.co/gShsyr2
https://ibb.co/GHXbgLY
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Old 09-12-2019, 01:51 PM   #24
Fierysun
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Quote:
Originally Posted by Mauled View Post
Ok mass airflow sensor fixed it, it runs good now. Any ideas what these two connectors go to?

https://ibb.co/gShsyr2
https://ibb.co/GHXbgLY
The orange one might be the uppipe sensor.
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Old 09-12-2019, 07:16 PM   #25
Mauled
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I'm excited to finally get this done soon. I got the tomoika dp coming in a few days. I wish there was an easy way to run a ewg setup on twinscroll. I have an entire ewg setup just collecting dust. Maybe later down the road I'll convert to single scroll.

I had an ej205 last time making 296whp. You guys think the ej207 ts setup tuned with stock turbo will be a funner/better setup?
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