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07-15-2019, 09:58 PM | #2726 |
Scooby Newbie
Member#: 481094
Join Date: Jan 2018
Location: Vermont
Vehicle:2011 Impreza OBS Blue |
rallisportautomotive sells UEL headers and some other stuff for 2006-2011 2.5i's.
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08-23-2019, 08:42 PM | #2727 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
2008 / Subaru / Legacy / EJ253 / 4EAT
Hybrid Intake w/ AEM dry flow filter: Less than ~$125 Infernofab 2.5RS style header w/ high flow cat: $700 Stock LGT midpipe, HKS Silent Hi-Power axle back Likes: It sounds great inside the car. I can barely hear the intake, the exhaust is deep and rumbly. Dislikes: I tried to be cheap and got an ebay intake. I hacked it up and used couplers, it doesn't fit quite right. It works, but I'm not 100% happy with it. The exhaust is raspy. I think the Delta Cams are at fault, it was always smooth before they were installed. I can't really comment on power gains, I'm sure it helps a little, combined with tuning, of course. This will all change in the next few months when turbo bits are installed |
08-27-2019, 01:44 AM | #2728 | |
over boosted again
Moderator Member#: 1458
Join Date: May 2000
Chapter/Region:
RMIC
Location: Colorado Springs CO USA
Vehicle:2017 WRX Limited 15 Forester XT, 21 Ascent |
Quote:
Tuning the ECU could make a big difference though, and make you happier. But be very careful when you start adding boost to an EJ25. My 2000 2.5RS was a bit different with it's MAP sensor, but it's still a big risk. When I added even a simple RB52 legacy turbo kit at 6-psi with a rising rate fuel pressure regulator it made the biggest difference, and 0-60 times up here at 6000 feet dropped from 8+ seconds to 6.0 seconds flat on 93 octane. I didn't stay there though, even after blowing up 2nd gear. With 100+ octane gas and 2 extra fuel injectors in the throttle body run by an extra EFI computer, my 2.5RS was making 233 whp at 6000 feet above sea-level and running 13.7@100 quarter miles at Bandimere Speedway. I should have stopped there. Then I got greedy and broke the rings, built a 9:1 motor with VF22 turbo kit with AW IC at 14 psi and it was probably at 375hp on 93 octane. It was incredible, except when it got boost creep in the mountains in 5th gear with a friend driving and did the motor in again, along with another trashed stock 5-speed gear set. Then I built a monster 8:1 motor, JE pistons, Pauter rods, knife-edged lightened balanced crank, O-ringed head, Cobb cams, tuned ECU with quad fuel rails and Garrett Ballistic/IHI hybrid turbo, HK BOV, and 6 core AW IC, and dual dump 3" downpipe with about 500hp. And this time blew up 5th gear and the front ring-and-pinon despite having a PAR/Chalak high power gear set that only replaced 1st-4th. The ceramic clutch we installed, after the ACT clutch was slipping, was now grabbing a little too well. We tried installing a Forester STi automatic transmission since it had the same 4.11 diffs as the 2.5RS, and after 2 months of replacing pedals and shifters and drive shafts and wiring, it was stuck in 3rd gear. So 0-60 (4,000 rpm) felt like a Honda civic, but then finishing out 3rd gear from 60-120mph (4,000 - 8,000 rpm) felt like the Millennium Falcon - everything was a blur. After that, my wife said, "it's you or the car, one has got to go" and I sold the motor for $5K, sold the turbo kit for $5K, installed a stock motor and rewired the transmission, and traded it for a brand new 2004 STi. I had to leave the 3" exhaust, Tein coil overs, and Wilwood 4-pot brakes on it, as well as the leather seat upgrade that I did after I bought it. After paying the dealership $1,500 to "fix" the transmission issues, I had $9,500 in trade value on a 36 month old 2.5RS that had cost me $20,000. I think at that point I decided to never mod my car again. The STi was near perfect, although I did do a Cobb tuning access port tune on it. Now I'm in a 2017 WRX and it's only got the STi exhaust and short shifter and no tune - I'm just told old now I guess. So, after hearing this, do you think you might want to just trade that in for a WRX or Outback Onyx XT? |
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08-29-2019, 10:57 PM | #2729 | |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
Quote:
I had considered a Forester XT, but this car has been paid for since 2013.. I'm only going to run a TD04 at 5-10psi, with AWIC and E85 fuel.. should be fairly safe.. relatively speaking |
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08-31-2019, 01:37 AM | #2730 | |
over boosted again
Moderator Member#: 1458
Join Date: May 2000
Chapter/Region:
RMIC
Location: Colorado Springs CO USA
Vehicle:2017 WRX Limited 15 Forester XT, 21 Ascent |
Quote:
Your plan is certainly feasible, I just wanted to let you know what you’re in for. |
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08-31-2019, 01:58 AM | #2731 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
I can't even imagine how awesome that would be.. recognized by Subaru! Dang
I appreciate the heads up! |
09-05-2019, 09:53 PM | #2732 |
Scooby Newbie
Member#: 443213
Join Date: Mar 2016
Location: Tallahassee, FL
Vehicle:2005 Saab 9-2x |
What are the current options for en equal length header?
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09-07-2019, 02:01 PM | #2733 | |
Scooby Newbie
Member#: 494393
Join Date: Nov 2018
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Rumblies
Quote:
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09-07-2019, 02:05 PM | #2734 | |
Scooby Newbie
Member#: 494393
Join Date: Nov 2018
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Rumblies
Quote:
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09-07-2019, 06:34 PM | #2735 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
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09-07-2019, 10:16 PM | #2736 |
Scooby Newbie
Member#: 443213
Join Date: Mar 2016
Location: Tallahassee, FL
Vehicle:2005 Saab 9-2x |
That's what I'm finding out. Since I have an 05 I believe that I'll need the header, cat pipe, and the newer oil pan for it all to work.
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09-07-2019, 10:57 PM | #2737 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
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09-08-2019, 08:46 PM | #2738 |
Scooby Newbie
Member#: 443213
Join Date: Mar 2016
Location: Tallahassee, FL
Vehicle:2005 Saab 9-2x |
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09-08-2019, 09:06 PM | #2739 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
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09-08-2019, 09:10 PM | #2740 |
Scooby Newbie
Member#: 443213
Join Date: Mar 2016
Location: Tallahassee, FL
Vehicle:2005 Saab 9-2x |
Last edited by SandmanSaab; 09-08-2019 at 09:19 PM. |
09-09-2019, 09:48 AM | #2741 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
Honestly, if you don’t mind the UEL sound, anything is better than the stock behind the pan manifold. That thing flows so bad. A cheap UEL will pick up power.
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09-09-2019, 01:35 PM | #2742 |
Scooby Newbie
Member#: 443213
Join Date: Mar 2016
Location: Tallahassee, FL
Vehicle:2005 Saab 9-2x |
Honestly I already have one. I swear this thing has an exhaust leak I can't find in the header. I'm going to replace it but if I oculd find an afordable EL that's the route I was going to go before getting another cheap UEL.
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09-09-2019, 05:34 PM | #2743 |
Scooby Newbie
Member#: 505361
Join Date: Aug 2019
Vehicle:2008 Legacy 2.5i White |
I think your cheapest bet is an OEM 2.5i manifold. None of the other nice headers are under 500, most 700+
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09-09-2019, 05:47 PM | #2744 |
Scooby Newbie
Member#: 443213
Join Date: Mar 2016
Location: Tallahassee, FL
Vehicle:2005 Saab 9-2x |
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11-05-2019, 07:57 PM | #2745 |
Scooby Newbie
Member#: 493494
Join Date: Nov 2018
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I have a 2006 Impreza 2.5i with an exhaust leak located in the manifold. Instead of fixing it I'd like to go ahead and replace it. I'd like to have UELs but I wouldn't want to have to replace my full exhaust system. Currently my setup is stock manifold and cat pipe with an STI catback and magnaflow muffler.
Would I be able to get rs style uel headers and a cat pipe and have it bolt right up to the catback or would I need a full exhaust for this to work? If that doesn't work than what are some good EL headers that would bolt right up? I'd like to go for a decent sound more than anything, my current setup sounds really good unless I get on the gas and it starts to get raspy. Eventually I'd like to replace the muffler with something a little bit more toned down as well since the amount of noise that comes from my car is ridiculous and I think it's had a pretty significant effect on my hearing as well. |
11-07-2019, 03:32 AM | #2746 |
Scooby Newbie
Member#: 399260
Join Date: Aug 2014
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I have a 2004 Impreza Outback currently with a custom made hybrid intake. I’d like to get an exhaust that gives me a little more power, and a slight increase in sound (a little louder and deeper. Just enough to be noticeable and sound nice but not make people deaf). Would this be accomplishable with just a muffler or would it be worth it to go full cat-back? What brands/models do you suggest?
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02-20-2020, 11:12 AM | #2747 |
Scooby Newbie
Member#: 511856
Join Date: Feb 2020
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2007 2.5i, completely stock at purchase.
I recently purchased an Impreza with the intent to mildly modify it for auto-x (SoCal Solo II). Sway bars (front and back), KYB shocks, front strut tower brace and brakes for handling. Intake, exhaust and crank pulley for some extra grunt. First up was exhaust as it was easiest, to me anyways, as there are lots of exhaust shops around. I read thru NASIOC looking for tips and hints. Having modified many cars in my past I know headers help, and I can do this at a later date. I went to a local shop that has done work for me before and we saw that the cat exit pipe was reduced to fit the resonator and that reduced pipe diameter was retained on resonator exit to the muffler. We ended up cutting the cat-to-resonator pipe where it reduced in diameter. This left the cat exit pipe of 2.5" to which additional 2.5" pipe was welded in and mated to a Subaru 2.5" resonator, and then welded in 2.5" pipe from the resonator to a 2.5" inlet Magnaflow muffler. The guys at the shop liked the sound quality, praising the use of the 2.5" Subaru resonator and the look for the oval rolled exhaust tip (fits perfect in the oval fascia cut-out). Having been coached by this forum I wasn't expecting a power gain nor bitchin (WRX UEL) sound. But, I was pleasantly surprised. It does have more grunt on throttle tip-in/part-throttle and has a proper muted rumble to it. On full throttle doesn't feel like any gain at all, probably is a couple of horse gain, but the butt-dyno can't feel that. $640 was the total cost. Next up, probably not intake. Seems to me much discussion on this subject so I'll leave it alone for now. I must say though I've used K&N since the late 80's on all my cars, several of them drop-in and several CAI types, always felt a power gain. Next up then will be something I'll need to purchase off the Internet. I'm thinking crank pulley (can't help myself, I want more grunt). Or front/rear sway bars and strut tower brace. Of course, before making a move on either I will continue to gather info from NASIOC. Thanks for listening...and thanks for all your input on Impreza 2.5i mods! |
03-23-2020, 07:31 PM | #2748 |
Scooby Newbie
Member#: 434830
Join Date: Nov 2015
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I have a 2006 OBS with Delta Cams, PNP, Hybrid Intake, and self tuned. I am working on choosing exhaust but I need help. Take a look at the log below of my load vs. rpm. Based on what I can gather it is taking in 1.7g/rev (~42% more air than stock) near peak power @ 5900 RPM. I didn't have the stock numbers when making this calculation, but from Williaty's thread for the hybrid intake, he had a stock 2.5RS with 1.2g/rev at the same rpm.
https://drive.google.com/file/d/1y4n...ew?usp=sharing It is safe to assume that this car can potentially make 1.42*173chp (stock) =chp 245? This assumes I pick the right exhaust obviously. Does any one have this type of log from similar builds or have some perspective to share? My worry is that if it is possibly making 245chp, the recommend exhaust diameter for this type of output is 2.5". That would be fine if there were better header options and secondary cat options this car. I appreciate any help you all can offer. Last edited by subiemodder77; 03-23-2020 at 07:33 PM. Reason: link didn't show |
03-24-2020, 05:44 PM | #2749 |
Scooby Newbie
Member#: 512858
Join Date: Mar 2020
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Good evening,
New here and honestly not overly knowledgeable with Subaru's. Our son loves Subaru's and will be turning 16 in October. Being his age, a WRX was out of the question due to insurance. We recently picked up a 2014 Subaru Impreza hatchback 2.0 5 speed. What options are out there for a decent sounding exhaust for this car? Thanks in advance. |
03-24-2020, 09:38 PM | #2750 |
Scooby Newbie
Member#: 512863
Join Date: Mar 2020
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2002 impreza rs
tsudo cat back gutted cats ebay uel headers aem intake DW200 fuel pump some other little stuff does anyone have any idea how to tune my ecu its a T3 I believe and I cant get ecuexplorer to work for it its a jecs model has anyone tuned one? |
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