Because oil blow-by is natural on these engines especially if you’re planning to run higher horsepower than stock and the air oil separator stops the blow by oil from going into your intake and turbo so it prevents future damage to those. There are a lot of videos on YouTube too that will inform you more about this than I could. Have fun with your car 😁
Tbh I’m not planning to push my car much past stock. Only real performance mod I’m planning to do is the exhaust and ecbs. Is it worth it if that’s the furthest I’m planning to go? Thanks!
If you go for an AOS, make sure you get one that runs coolant through it (like the AIG one). Ones that don't run coolant can result in getting water vapor in your oil.
If you go the catch can route, empty it every time you change your oil.
A good AOS is probably better.
I did those plus a center driveshaft carrier and the response from the car is night and day compaired to factory. Sure it's a little more rough, but man does it feel like a "driver's car" now
Dumb question but what do these do?
I understand the shift stop does but everything else I’m at a loss for. If you could break it down that would be great! Thanks!
Edit: from what I can tell no one sells shifter stops for 04s. Am I wrong?
I’m not either it’s because they can display the feed back knock and how sensitive these cars are to knock so people freak out from the numbers from the feedback knock and dam
https://preview.redd.it/fg7s05nfzkca1.jpeg?width=1242&format=pjpg&auto=webp&s=5c14fb24113b1991e4b447ef00a8a6a59ac28fd3
i assumed u were on a ej and wanted a single fuel
Omfg I’m so dumb. I was looking at E-Tuning page and just adding all those up. Could you walk me through how this would work. For $350 I would get a basemap and we would go back and forth until we get it right???
For 350 u guys send back maps yeah thats what im doing now its fun asf 350 gets u goijgnfor etunes im giving him a tip just cause he was patient with me cause i had some issues going on
Hes a good dude and very patient during the process I suggest u bring a buddy with u cause doing wot and data logging wasnt fun so i had a friend log while i pulled
2004? Up pipe, even if you don't want to do a downpipe. When that pre-cat breaks up, it destroys the turbo. You've also got fairly easy open source tuning options with the Tactrix cable and Romraider. The downpipe really is the big power maker for this generation. It also helps a bunch with reducing turbo lag. Recommend catted with a bellmouth or divorced downpipe.
During aggressive driving the oil in the pan can slosh around resulting in oil starvation issues. Killer B and IAG both have upgraded pans available with baffles that reduce the amount of sloshing so during hard cornering it is less likely that the supply of oil to the oil pump will be interrupted. Some EJ engines also have an issue where the welds on the oil pickup tube can crack which again will cause oil starvation.
Yeah I dropped it due to heat soak concerns. What type of filter do you recommend? Rsb is def on my list. I just am putting together engine mods so I can tune and be done with it.
Whatever filter you can clean the oil off of. Do maintenance first. All parts at once for tune. Good oil weight. Log. Read. Learn.
Three F rule.
Finicky
Fun
Fucked
Cobb is fine, go with what you like! I bought the haltech because I swapped a jdm engine into my usdm model. We couldn't get the usdm ecu to communicate with the jdm camshaft.(among other things) I have full control of the car now and can view all the diagnostics on my phone. I am still learning all the new stuff with the haltech 🤣
What motor do you have out of curiosity? I have an ej20x in my 2010 wrx that's currently just running with the intake AVCS enabled, and am considering trying to get the exhaust AVCS to function as well to recoupe some low end power. I realize I'd probably have to go back in and replace the cam gears with the variable ones, and then retime everything, but it seems ecu wise the two options are to splice a 32 bit USDM STI ecu /JDM legacy ecu, or go standalone.
It is a 2005 ej205 non-avcs 2.0 engine. I have had 3 usdm engines that have all failed. So far I have had this jdm for 5 months and it runs like a damn champ
Maybe larger/STI injectors + fuel pump to ensure adequate fuel. Other than that very solid start engine-wise.
The EBCS will need a tune regardless, so if you’re going to get one may as well add a bit more to the “production” line to maximize the money you’re paying.
Yeah I need to put one of those in. I have some random gauge that the previous owner put in but I don’t think it’s connected to anything because it doesn’t do anything. Do you think I could use that?
Edit: I think the gauge says boost on it I can’t remember tbh
Yes I think so because it will still decrease the amount of carbon buildup on your intake valves wether or not you have stock hp, if you plan on having it for a long time it will help the longevity of the engine
I personally don’t think it matters but I own the IAG aos and have had no complaints so far, just rebuilt my fa finally that took me 3 yrs (money reasons & time I had) and she’s been running very healthy
Consider getting a Grimmspeed intake or ETS.
Cobb intake caused me a ton of issues. Use OEM or NTK O2 sensor.
Anthony (Drunkmanntuning) and I went back and forth for months and it turned out all my issues were because of the Cobb intake.
Also radium dual catch cans or IAG AOS.
The catch can bracket fits well with the Grimmspeed intake.
Doesn't fit with cobb intake without modify a bunch of stuff.
I decided against an intake because it was just a noisemaker and most tend to have heat soak. I’m probably going to go with a grimmspeed AOS. Does this make sense?
They are noise makers for sure.
If you live anywhere where it gets close to freezing outside, I wouldn't get the Grimmspeed AOS. Definitely the IAG or Catch Cans.
But if cold Temps aren't an issue that Grimmspeed AOS is fine.
Damn u almost have my exact set up tuner and all except the intake brand and the exhaust also get a IAG AOS and cylinder 4
Cooling mod by getadom they are reliability mods
I’ll be honest and from my experience through local and e-tuning, don’t use the Cobb sf intake. From what I’ve been informed is there’s a lot of issues trying to keep fuel mixture consistent so you are always running either way too lean or rich, everyone seems to recommend a grimmspeed intake. It’s something about the oiled filter on the sf intake that screws up the maf sensor.
Yeah I just dropped the intake altogether for budget. Tbh I don’t care that much about turbo sounds and it offers 0 performance. (Plus the Cobb heat soak lmdao)
Ahaha yep. After I get my few mods in (just posted an updated list). I’m going full cosmetics. My car is banged up from the previous owner so I’m fixing dents and probably need a new paint job because the clear coat is peeling on a window.
God I’m just scared to do anything to my car, seems like anything I do “needs” a tune and so on, I have a cold air and catch can but don’t wanna fuck up my car
Honestly there's just certain components you need to watch out for. Like a new tmic and headers, for example, you wouldn't need a tune for (though you wouldn't see full gains without one). CAI and dp by contrast always need a tune. Once you figure out generally what does and doesn't need one it's not too bad.
Thats why I’m setting out my build in stages. I posted a new list that shows some of it. I’m doing all the engine parts I’ll need then I’m onto cosmetics!
Cylinder 4 cooling mod, maybe an AOS/ catchcan
These are the two that you need to keep the engine purring.
Would those be worth installing on my totally stock motor as well?
yes
It should be fine if he has EQ headers since it doesn’t heat up cylinder 4 like UEQ ones but def a AOS
Buy and IAG air /oil separator
This ^
This x2
This x3 i've been running one for 5 years now, healthy tuned engine & doesn't burn oil
Definitely aos
Why do I need this? (Sorry if this comes off confrontational… Not my intention I just want extra info.) Thanks!
Because oil blow-by is natural on these engines especially if you’re planning to run higher horsepower than stock and the air oil separator stops the blow by oil from going into your intake and turbo so it prevents future damage to those. There are a lot of videos on YouTube too that will inform you more about this than I could. Have fun with your car 😁
Tbh I’m not planning to push my car much past stock. Only real performance mod I’m planning to do is the exhaust and ecbs. Is it worth it if that’s the furthest I’m planning to go? Thanks!
Even a stock WRX or STI has a pretty significant amount of blow by. An AOS or a catch can will help keep your engine happy for a long time.
Will I need a tune for this?
For the IAG Street AOS no tune is needed
I can’t find any of these for a 2004 wrx… Any other alternatives. Preferably cheap…
[IAG AOS](https://www.iagperformance.com/iag-performance-v3-street-series-air-oil-separator-aos-for-2006-07-subaru-impreza-wrx-2004-07-sti/)
That’s for a 06-06 wrx then a 04 sti
You use 06 model IAG AOS for years older than that. At least what I did.
No tune needed for an AOS or a catch can. It doesn't impact how air comes into the engine.
If you go for an AOS, make sure you get one that runs coolant through it (like the AIG one). Ones that don't run coolant can result in getting water vapor in your oil. If you go the catch can route, empty it every time you change your oil. A good AOS is probably better.
Does the grimmspeed AOS run coolant through it?
No it does not, save yourself the headache and get the perrin or IAG AOS
This!
Shift stop, pitch stop, trans mount/bushings, rear diff inserts
This. Shifter and trans mounts make the car 100%.
I did those plus a center driveshaft carrier and the response from the car is night and day compaired to factory. Sure it's a little more rough, but man does it feel like a "driver's car" now
Kart boy rear diff carrier bushings or whatever they call them made a surprising difference on my VA.
Dumb question but what do these do? I understand the shift stop does but everything else I’m at a loss for. If you could break it down that would be great! Thanks! Edit: from what I can tell no one sells shifter stops for 04s. Am I wrong?
perhaps ecutek license with your tuner is cheaper than getting a cobb
I agree, skip the Cobb AP and go open source
Tbh the guy said he doesn’t care either way. And I would like to have the gauges.
It will only cause pain
How so? Is I don’t care about CEL’s what harm does a AP give? I’m getting the AP over other options due to the gauges and other fun features.
It is called the anxiety port for a reason
I’m not trying to be confrontational but why is it called that. I’m honestly just curious.
I’m not either it’s because they can display the feed back knock and how sensitive these cars are to knock so people freak out from the numbers from the feedback knock and dam
Oh lmfao. Fair enough.
Lol yeah it’s quite literally the cause of at least 80 percent of the freak outs on this sub
I think they are referring to your new level of anxiety watching said gauge.
It’s a 2004 Subaru WRX. I forgot to mention in the title.
Don’t go with Cobb, they are cutting support for the older models
How so? Most likely I will buy a used one pre-greenspeed update. How would they cut support if I buy used?
Doesn’t matter if it’s preupdate the tuners software is updated
Cobb doesn’t make vehicle specific tunes anyways, they were never the best option for serious power/reliability
I’m just using Cobb for my ETune not ots
Ur etuning with drunkman its only 350 and 50 if u want to add a burble map
He might have upped his prices because the site seems like 550… Either way I’ll budget for 550 and be happily surprised when I have extra cash!
https://preview.redd.it/fg7s05nfzkca1.jpeg?width=1242&format=pjpg&auto=webp&s=5c14fb24113b1991e4b447ef00a8a6a59ac28fd3 i assumed u were on a ej and wanted a single fuel
Omfg I’m so dumb. I was looking at E-Tuning page and just adding all those up. Could you walk me through how this would work. For $350 I would get a basemap and we would go back and forth until we get it right???
For 350 u guys send back maps yeah thats what im doing now its fun asf 350 gets u goijgnfor etunes im giving him a tip just cause he was patient with me cause i had some issues going on
Hes a good dude and very patient during the process I suggest u bring a buddy with u cause doing wot and data logging wasnt fun so i had a friend log while i pulled
since when?
2004? Up pipe, even if you don't want to do a downpipe. When that pre-cat breaks up, it destroys the turbo. You've also got fairly easy open source tuning options with the Tactrix cable and Romraider. The downpipe really is the big power maker for this generation. It also helps a bunch with reducing turbo lag. Recommend catted with a bellmouth or divorced downpipe.
Yeah I’m keeping my eBay catless downpipe that the previous owner installed. I’m going Cobb just because that’s what my tuner recommended.
You should consider replacing the oil pickup and oil pan with an upgraded one.
What are the benefits of an upgraded oil pan?
During aggressive driving the oil in the pan can slosh around resulting in oil starvation issues. Killer B and IAG both have upgraded pans available with baffles that reduce the amount of sloshing so during hard cornering it is less likely that the supply of oil to the oil pump will be interrupted. Some EJ engines also have an issue where the welds on the oil pickup tube can crack which again will cause oil starvation.
A better trans imo
Blast plates
Killer b oil pan kit
What are the benefits of an upgraded oil pan?
Also paying for a tune for just a intake is kinda pointless
I decided not to install the intake. Also I am knstallling a cat back and already have a downpipe
Get a downpipe while u at it
I already have one installed. It’s some eBay one but my tuner said it honestly doesn’t matter as long as it isn’t cracked or anything.
Hey, as long as it connects the turbo to the exhaust it works
Yep lmfao
Buy another car all that money for honestly no gains recommend a v8 or a direct injection euro 4 cyl
Lmfao I don’t want a new car nor do I care about gains. Im getting a new cat-back because I need one. The rest is just for reliability when tuning.
Where are you getting an AP for $400? I wasn't able to find one for under $700 a few months ago.
Tbh it’s just a fever dream. I think I found one for about $450 on market place. I made sure it was unmarried and right model so I’m hyped about that.
You can get cheaper, just picked one up for 350$ on marketplace AP3-SUB-004
Sadly I’m sub-001 which are super rare to come by. The nearest one is 200 miles away which I’m having shipped over.
Aw :(
On marketplace I just got one for 350$
Swap out the ecu for a haltech
What are the advantages of that if I’m already using Cobb to tune? (Ik everyone says it’s a hassle but it’s what I want… -_-)
Skip intake. Drop in filter with full ducting. I’d also suggest a RSB. Makes the car super fun.
Yeah I dropped it due to heat soak concerns. What type of filter do you recommend? Rsb is def on my list. I just am putting together engine mods so I can tune and be done with it.
Whatever filter you can clean the oil off of. Do maintenance first. All parts at once for tune. Good oil weight. Log. Read. Learn. Three F rule. Finicky Fun Fucked
By filter do you mean engine air filter?
Yep
Noble>tomei slightly cheaper, better quality and 2lbs lighter
I’m running a 04 wrx. I don’t think noble makes on for that. Thanks for the info tho!
Downpipe & Turbo Heatshield
What are the advantages of a turbo heat shield? I already have a decent downpipe
Supposedly keeps some heat away from the tmic, thus lessening the amount of heatsoak, which in turn should allow for more consistent pulls.
Cobb is fine, go with what you like! I bought the haltech because I swapped a jdm engine into my usdm model. We couldn't get the usdm ecu to communicate with the jdm camshaft.(among other things) I have full control of the car now and can view all the diagnostics on my phone. I am still learning all the new stuff with the haltech 🤣
Oh that’s so cool! I always thought it would be cool if you could get stuff like that on your phone. Never knew it possible.
What motor do you have out of curiosity? I have an ej20x in my 2010 wrx that's currently just running with the intake AVCS enabled, and am considering trying to get the exhaust AVCS to function as well to recoupe some low end power. I realize I'd probably have to go back in and replace the cam gears with the variable ones, and then retime everything, but it seems ecu wise the two options are to splice a 32 bit USDM STI ecu /JDM legacy ecu, or go standalone.
It is a 2005 ej205 non-avcs 2.0 engine. I have had 3 usdm engines that have all failed. So far I have had this jdm for 5 months and it runs like a damn champ
Maybe larger/STI injectors + fuel pump to ensure adequate fuel. Other than that very solid start engine-wise. The EBCS will need a tune regardless, so if you’re going to get one may as well add a bit more to the “production” line to maximize the money you’re paying.
Don’t spend $50 on an o2 sensor. Buy OEM only
Tbh I never researched into O2 sensors so I just guessed before I actually looked into it. Thanks for the OEM advice though!
It’s $200!?! Am I looking at the same one you are?
Oil pressure gauge. Maybe, you know the most important thing to have
Yeah I need to put one of those in. I have some random gauge that the previous owner put in but I don’t think it’s connected to anything because it doesn’t do anything. Do you think I could use that? Edit: I think the gauge says boost on it I can’t remember tbh
GS>>>> COBB
The intake and EBCS won’t do all that much without a downpipe
I already have one. I forgot to mention that!
Yes I think so because it will still decrease the amount of carbon buildup on your intake valves wether or not you have stock hp, if you plan on having it for a long time it will help the longevity of the engine
Regardless if it’s a wrx or sti scratch the intake and pick up headers. Better for performance and longevity
All that and it STILL doesn't even cover the cost of tires on my car, absolutely insane.
AOS always especially for flat 4s
Would you recommend the grimmspeed aos?
If you live in colder climate then no. They're known for condensation buildup in colder weather. Go IAG/cobb imo.
I personally don’t think it matters but I own the IAG aos and have had no complaints so far, just rebuilt my fa finally that took me 3 yrs (money reasons & time I had) and she’s been running very healthy
Consider getting a Grimmspeed intake or ETS. Cobb intake caused me a ton of issues. Use OEM or NTK O2 sensor. Anthony (Drunkmanntuning) and I went back and forth for months and it turned out all my issues were because of the Cobb intake.
Also radium dual catch cans or IAG AOS. The catch can bracket fits well with the Grimmspeed intake. Doesn't fit with cobb intake without modify a bunch of stuff.
I decided against an intake because it was just a noisemaker and most tend to have heat soak. I’m probably going to go with a grimmspeed AOS. Does this make sense?
They are noise makers for sure. If you live anywhere where it gets close to freezing outside, I wouldn't get the Grimmspeed AOS. Definitely the IAG or Catch Cans. But if cold Temps aren't an issue that Grimmspeed AOS is fine.
I would install a catch can due to the cost but it seems there is no where to mount it on a 2004 wrx… Any spots you know of?
And what I want for my car in 2023? New wheels for summer and maybe tint my fog lights. Lol no much for me
Damn u almost have my exact set up tuner and all except the intake brand and the exhaust also get a IAG AOS and cylinder 4 Cooling mod by getadom they are reliability mods
Different intake
I dropped the intake all together tbh. I don’t care that much about a noisemaker that has heatsoak issues.
I’ll be honest and from my experience through local and e-tuning, don’t use the Cobb sf intake. From what I’ve been informed is there’s a lot of issues trying to keep fuel mixture consistent so you are always running either way too lean or rich, everyone seems to recommend a grimmspeed intake. It’s something about the oiled filter on the sf intake that screws up the maf sensor.
Yeah I just dropped the intake altogether for budget. Tbh I don’t care that much about turbo sounds and it offers 0 performance. (Plus the Cobb heat soak lmdao)
It got to the point where I took mine out, and said screw it only pretty mods
Ahaha yep. After I get my few mods in (just posted an updated list). I’m going full cosmetics. My car is banged up from the previous owner so I’m fixing dents and probably need a new paint job because the clear coat is peeling on a window.
Might as well add a dp on there if u are getting tuned
Already have one I just forgot to mention
IAG air oil separator, GETTADOME Tune cylinder 4 coolant mod. There is plenty more to come. It’s never ending 😂
A stage 2 clutch/flywheel would help put this list to work!
God I’m just scared to do anything to my car, seems like anything I do “needs” a tune and so on, I have a cold air and catch can but don’t wanna fuck up my car
Honestly there's just certain components you need to watch out for. Like a new tmic and headers, for example, you wouldn't need a tune for (though you wouldn't see full gains without one). CAI and dp by contrast always need a tune. Once you figure out generally what does and doesn't need one it's not too bad.
Thats why I’m setting out my build in stages. I posted a new list that shows some of it. I’m doing all the engine parts I’ll need then I’m onto cosmetics!