Ej255 hp Apr 22, 2017 · The MAHLE Motorsports PowerPak kit is Mahle's high volume shelf stock program developed for high performance enthusiasts and sportsman class racers. Of coarse the catback, downpipies, intake, accessory is all coming later but that costs some serious dough lol so for now what do you guys suggest for some simple IAG's 550 Short Block is designed for EJ25 Subarus needing a stronger short block to support increased cylinder pressures created by added boost pressure. Turbo´s TD05 16g. Successors EJ257 Turbo FAQ How much horsepower does EJ255 Turbo have? It produces the 240 HP What is the fuel type for EJ255 Turbo? This engine is powered by Petrol. The EJ series is the mainstay of Subaru’s engine line, with all engines of this series being 16-valve The EJ255 engine was a key part of the WRX's high-performance package, providing strong acceleration and responsive power delivery thanks to its turbocharger. 5 Endurance Sep 3, 2022 · Subaru WRX FAQ. New OEM Head Alignment Dowels Stage 2. The IAG 750 Closed Deck Subaru EJ25 short block is capable of 750 BHP. Sep 19, 2008 · Limit of EJ255? Factory 2. 93 bar, a larger intercooler was installed and 230 hp at 5600 rpm was removed. 4:1 CR. Please read the rules, they will be enforced. We have used, rebuilt, and remanufactured 2. Jan 23, 2025 · When it comes to choosing a Subaru engine for your vehicle or your next build, understanding the differences between the EJ255 vs EJ257 is essential. For right now I want my power levels to sit around 325-350 for daily driving purposes. 5L Turbo) GSC Power-Division billet S1 camshafts for the USDM STi and WRX with Intake only AVCS. You'll find that piecing it together is going to be very expensive (unless you cut corners). Feb 4, 2015 · All times are GMT -4. The PowerPak pistons are predominantly made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances and improved temperature stability. thought good rule of thumb was 10-12hp for ever pound. 0l ej20x a good choice over the stock ej255? Will I be missing out on power /torque or reliability? Not looking to mod it besides exhaust, intake, short shifter. The difference is the piston dish and heads. I want same more powerful. 2:1. The EJ255 is known f Sep 3, 2007 · EJ257 vs EJ255 dyno results are in !!!! Factory 2. Jun 4, 2025 · Explore the specs, configuration, oil requirements, and service intervals for the Subaru 2. My question is, if I'm pulling the motor apart anyway, what is recommended for a 280000km EJ? How much hp does the stock fuel system hold? I was at a meet tonight and was discussing about mods with someone who got their tune from the same tuner I am going to, and recommended an upgraded fuel pump before the dyno tune. We offer 4 stages of builds, for any application. Anyone else done this, and if so how much did it run you? Planning on doing it myself but if you have a labor cost as well I’d love to hear it, (I know I’m gonna mess No accessories Engine code fitments:EJ255 Single AVCS Only (Please specify casting, eg: D25, W25, B25, etc) 2004 - 2014 Subaru WRX 2004 - 2013 Subaru Forester XT 2005 - 2012 Subaru Legacy GT 2005 - 2009 Subaru Outback XT 2006 - 2014 Subaru Impreza WRX 2004 - 2006 Subaru Baja Turbo Core Deposit (added onto Stage 1 price): EJ255 Single AVCS This manual contains complete technical information about the Subaru EJ25 engine. From what I have found with some light searching I need a new fuel pump, new tmic, possibly new injectors, and an electronic boost controller. 5L Turbo) Feb 10, 2025 · Explore the best Subaru EJ engine variants, their performance, awards, and why they stand out in the automotive world. None the less I am thinking of building the motor with the goal of a streetable, reliable 300kw motor - give or take. Don't go with anything else. This engine helped make the 2007 WRX a popular choice among enthusiasts seeking an affordable, all-wheel-drive sports car. What oil is best for EJ255 Turbo engine? The recommended oil viscosity is 5W-30. Please let me know which parts are Doing a conversion like this is a lot less practical than buying a complete EJ257/EJ255 though. Subaru WRX FA20DIT turbo. Crest CNC (formerly Willall), is renowned for their precision-machined billet aluminum engine blocks and components. Ideal for Dec 26, 2024 · If we are talking EJ255, the 2006 and 2007 used the same TD04L-13T on the outgoing EJ205 2L. After a bunch of tuning I finally got it to make more than 160 awhp. I sounds insane as well. Built with 99. if what you say is true then i just need to go to protune and say boost and tune for 20psi and ill hit 300. New comments cannot be posted and votes cannot be cast. 5 but it recwntly seized up and am swapping it with a ej205 to save some money. The welds will crack and they get really raspy and loud. Jan 11, 2009 · The blocks themselves are identical. Who makes the EJ255 Turbo engine? The following motor is produced by Subaru. These will not drop any low end power, and will create more power and torque across the entire RPM range. It got hot at some stage and this was the result. These engines range from 2004-2007. May 25, 2007 · I have a 2004 wrx manual. 5-liter turbo engine Subaru EJ255 is produced at the enterprise in Japan since 2004 and is put on charged versions of such popular models as Impreza, Legacy and Forester. Built motors for higher power and more reliability. Subaru STI EJ257 and EJ25. Dec 25, 2014 · Hey all, apologizing ahead of time for the newb post ha but I'm lookin to gain some more hp with some easy bolt ons, if possible. So I believe that a stock ej255 will handle 300whp for over 100k miles. With Crest’s proven track record of producing blocks that endure the rigors of high-output engines, combined with our expertise in high-powered aftermarket Subaru builds, this Jul 11, 2017 · Hey all,I have recently swapped out stock TD04 turbo with a VF52 and Grimmspeed 3 port BCS (along with a new clutch kit + flywheel machined). The car is hitting desired boost and even overshooting when spooling up in the lower rev ranges. Requesting a build recipe Factory 2. This power unit has many different modifications with power from 210 to 265 hp. Dec 24, 2015 · How much boost can an ej255 handle? Factory 2. The WRX III was fitted with a VF52 turbo, blowing 0. Going to be my first engine build so any info would be super helpful. The common failure point are the ringlands which hold the piston rings in place. However in the higher rev ranges boost is steadily tapering Feb 6, 2012 · EJ255: Standard WRX/Legacy motor from 2006-present, 2. Introduced in 1989, they were intended to succeed the previous Subaru EA engine. Differences between EJ257, EJ255 and what is mine? I own a 98 forester L and was wanting to know what to look for when researching compatibility of internal engine parts. EJ255 engine faults & failures. If you have a stock EJ257 engine (or EJ255 for that matter), the first stock component that is likely to fail as you turn up the power is the pistons. Jun 20, 2025 · Explore the reliability, common problems, and oil specifications of the Subaru EJ255 2. with spirit. I'd like to keep it going. Should be safe? How long will a stock ej255 run if well cared for? Should I budget a rebuild at 150k or closer to 250k? Any other tips Which leads me to my question: what are the odds I will have an issue with a brand spanking new EJ255 anyway? It comes with a 2 yr warranty and i will be anal about oil levels and servicing, but what chance is there mine craps out at 70,000km or whatever? Archived post. Subaru WRX EJ20, EJ205, EJ255, FA20DIT, FA24DIT. And with expert customer service, JEGS is here to answer any questions and help with I’m looking to get a little more power out of my v2 ej255 in my 07 Legacy Spec B. Ensuring reliability for your Subaru driving experience. Dec 16, 2019 · Okay, so with that out of the way, let’s get into it. Version 2 is equipped with a slightly different AB630 short block and AB820 Aug 30, 2022 · The iconic EJ55 flat-four boxer engine powers some of Subaru’s most successful rally-bred saloons. To look at what the differences are, we’re goin Jan 16, 2009 · In your opinions, is swapping out the 05 EJ20 for a Cosworth EJ25 a good move for someone looking to make at least 400whp/tq? Or…. 25mm OS Manley Performance Connecting Rods New OEM STi Nitrated Crankshaft King XPG Bearing Set New OEM Main Bolt and O-Ring Kit New OEM Plug and Baffle Kit New OEM Head Alignment Dowels Stage 2. I'm planning on pulling the engine from my 2004 XT forester as it is in desperate need of seals and gaskets. Gonna run her as is until it dies, but I’m going to start making a list for all the stuff I’m going to need to build my engine to 350whp. Do you some tips? 18G or some SC turbo? Garrett? my dream its 400HP+ and 600 NM Marek SVK Feb 4, 2011 · For an EJ255 and EJ257, all the block needs is a set of forged pistons. 75mm forged pistons, H-Beam connecting rods, STI crank, and new bearings. Dec 3, 2020 · Learn about common Subaru EJ255 common problems. Some applications require 2618 alloy including the PowerPak Plus category. Aug 12, 2013 · How much power can the EJ255 hold safely? Car has 121k on it so far. My short term goal would be to make around 300-320 whp, but if that’s risky for a stock long block, then I’ll settle for less. 5L Turbo) Sep 5, 2009 · really? seems like great power gains to me over stock. 5 liters td04 turbocharger (wrx) vf40 (legacy gt 05-06) VF46 (Legacy GT 07-09) VF54 (10-present) HP: 210-265hp Manley offers full rotating assembly kits for Subaru EJ205/EJ207/EJ255/EJ257 engines. On the other version, the supercharger was increased to 0. Looking for Turbo EJ255 advice! Hi all, I come seeking the wisdom of those who have worked on turbo EJ255s. The EJ255 and EJ257 are both turbocharged, flat-four engines with a strong Nov 1, 2012 · Hi My question is how many power/HP it's safety for me serial block in my XT 2005? I have Mahle pistons,Manley H-beams, 850cc, and MT6 non dccd. In this video, Zach takes an in-depth look at the Subaru EJ255 engine, examining its overall reliability, performance characteristics, and long-term ownershi Feb 3, 2013 · Turbo & Injector recommendations for built EJ25 Built Motor Discussion What’s the most HP you can realistically get out of an EJ255 without blowing it to smithereens? Subaru engine rebuild for EJ 255 257 WRX STi Legacy Impreza. This first variant produced 207 hp with 8. It is not a place to buy/sell/trade or spread negativity/hate. Luckily, JEGS offers the lowest prices on ATK complete crate engines. 92 bar. With a starting price of around $3,300, ATK engines remanufactured crate engine is by far the best value on the market. The EJ series was the mainstay of Subaru's engine line, with all engines of this series being 16-valve horizontal flat-fours, with configurations available for single, or double-overhead camshaft arrangements (SOHC or DOHC What is the EJ25 2. The EJ257 and EJ255 share the same block castings, crank, and rods. Shop now and find the perfect engine for you. The EJ255 is a turbocharged version published in 2004 as the engine for the Forester. A forged internals ej255 will wont last any longer This Japanese Domestic Market (JDM) Subaru EJ255 2. 400 whp (particularly on 91 octane pump gas) is when cylinder pressures are high enough that a random knock event can take We detail the best approach to EJ255 tuning and highlight the best modifications. 5 psi (0. 🔹 Features of the engine management system – sensors, fuel and ignition. 5L Turbo Powertrain (EJ Series Factory 2. Subaru EJ25D EJ251 EJ252 EJ253 & EJ254 make awesome project engines and with the optimum upgrades like a remap, turbo upgrades and camshafts you will greatly maximise your driving enjoyment. Jan 31, 2017 · THE NUMBERS: Start with 227 hp out of that EJ205 or make your 500hp goal that much easier to reach with the EJ257's 293 hp and 290 lb-ft of torque. Ive read the 2. 0 Endurance Short Block (475 HP) $2,750 Blueprinted Block Machining Package Mahle PowerPak Pistons . 2005-2006 Impreza WRX and Legacy models also were equipped with the EJ255. Dec 23, 2000 · How much Horsepower can the EJ25 Handle? Normally Aspirated Powertrain I recently found some somewhat anecdotal evidence from old forum posts suggesting that the power output of the EJ255 in the 2006 and 2007 WRXs may have been underrated by the factory specs, which place the power output at 224-230 hp. Introduced in 1994, the STi has proven to be a very Aug 7, 2024 · I have an 08 wrx with the 2. so 60-50hp gains seams amazing! and if stock is 14psi only going to 18psi is 15hp per pound which is spot on if not more. But what sets them apart? In the world of performance cars, understanding these differences is key to optimizing your vehicle’s potential. Nov 4, 2019 · Hi Everyone, i'm buying a WRX this week but unsure whether to go for the Hawkeye or Blobeye based on the engine, i have heard conflictin opinions on which is strongest. This variant of the EJ255 produced 224 hp and 226 lb-ft of torque. 5L in the 2006-2007 Subaru WRX GG7/GD7. Find its specs and reliability info in this guide. 93 bar). It has ividia catback ehaust with and ividia cated down pipe, K&N short ram intake, with stage 2 cobb tunning. High power engine builds with forged internals, forged pistons, forged rods, forged crankshaft, cnc closed deck blocks. Each kit is Sep 8, 2016 · Forged internals ej255 WRX motor build Factory 2. IAG Performance offers Subaru long block engines designed for durability, horsepower, and peace of mind under boost. FA20 and EJ257 reliability, mods, performance. 5L Turbo) Hey all, I have a 2009 Subaru Forester SH XT 2. I plan to o Mar 11, 2011 · WRX max hp on stock internals/stock tranny? 1 reading Jump to Latest 130K views 11 replies 8 participants last post by turmic Jun 8, 2011 Oct 4, 2013 · Get me to 400hp. Jul 21, 2025 · Overview of the EJ255 Engine The EJ255 engine is a robust and versatile powerplant produced by Subaru, known for its turbocharged performance and reliability. Explore our collection of top-notch engines. Subaru chassis codes, specs, upgrades, & more. 0 has less low end torque and it had less hp so what Dec 1, 2002 · This dropped output from 250-hp to 227-hp. [8] EJ255 Version 2: Used in the 2006-2008 WRX, the 2007+ Legacy, and the 2006+ Forester. May 16, 2025 · 2. . Curious if there is What engine should i choose? EJ255 or Ej20Y/EJ20X Hey I recently got a rod knock on my 2013 WRX. The Stage X Billet Short Block is a complete short block built by IAG on the Crest billet platform. This engine uses the same shortblock and heads like EJ257 in US 04-06 STI. 5L Turbo) Mar 21, 2023 · In this article, we will take a closer look at the specs and reliability of the Subaru EJ25 engine. The combination of the small chamber EJ255 head and shorter piston dome make the 8. With that said, I like to drive my car. From what i've read the cynlinder liners on the 2. Nov 16, 2023 · Explore the Subaru EJ25 engine: its specifications, upgrades, problems, and maintenance tips. ETS is the only catback I recommend when it comes to performance and quality. Subaru race engines that are reliable for big turbocharger. Is 21 psi/327awhp too much for a stock block? what I've heard is: 20psi and under is safe for daily-ing. Now the car ran Mar 31, 2020 · At that point, the stock EJ255 engine would definitely be at its limit, so this factory turbo setup is great for most people. Learn all about the differences, similarities, and which is truly best. Mar 16, 2025 · Discover the specifications, common problems, and reliability of the Engine Subaru EJ255 2. Includes: 🔹 DTC (Diagnostic Trouble Codes) – list of errors and their decoding. If we were using the engine on the track we’d highly recommend fitting a PBMS baffled sump to prevent oil surge that could damage the engine. The EJ257 has a deeper head and taller dome, making 8. Upgraded valve springs are required ; beehive valve springs are recommended, but not required. 5 with invidia catback, perrin intake, sti turbo, cold air, tuned on 93. Also there is EJ255 version with the increased intercooler and with maximum boost pressure 13. When it comes to a catback, avoid titanium for higher HP builds. It definitely has a lot to offer, so let's dive in. May 29, 2020 · My 5th gen has hit 170k and burns a disgusting amount of oil. Also an EJ20Y engine is costs at about $1,200 when the ej255 is at $5,000 both being at 35k miles EJ257 / EJ255 CAMSHAFTS A series of low-volume versions with even greater power and grip were built by Subaru's in-house modifier, Subaru Tecnica International (STi). Oct 11, 2024 · This makes it possible to remove 210 hp at 5600 rpm. The issue I’m running into is in the datalogging I’m seeing for primary wastegate duty. For the EJ255, prices can reach as much as approximately $5,500. 5L Turbo (EJ255), long story short the motor is out of the car it was mixing coolant/oil. Subaru EJ255 Impreza WRX, Forester, Legacy, Outback problems. 5L Engine design and features, its the most common problems and relaibility. Jun 29, 2022 · Rebuilding EJ255 - does my plan make sense? Factory 2. Explore the Subaru EJ25 turbo engine in the Legacy GT B4 – specs, performance, reliability, tuning potential, and common issues for EJ255 & EJ257 models. Consisting of a series of four-stroke engines first introduced in 1989, the EJ family succeeded the Subaru EA engine. Apr 10, 2023 · The Subaru EJ257 engine vs EJ255, EJ207, EJ25 EJ257 vs EJ255 A comparison table of the Subaru EJ257 engine versus the EJ255 engine in terms of reliability: Overall, both the Subaru EJ257 and EJ255 engines are known to be reliable with proper maintenance. 327awhp when it hit boost cut at 21psi. Everything is stock, turbo and all. STi versions of the Impreza, which produced 280 PS (206 kW) from new, are often raced, largely unmodified, in the Group N class in various rally championships to great success. 0l which has I have a 2012 Wrx that needs a new engine, is the 2. 🔹 Wiring Diagram – electrical diagrams for diagnostics and repair. Subaru Impreza FAQ. The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. I was getting just over 300 crank hp on the 2. Applications 2002-2014 Subaru Impreza WRX (EJ205/EJ255) 2007-2020 Subaru Impreza WRX STI (EJ257) 2005-2009 Subaru Legacy GT (EJ255) 2007-2013 Subaru Forester XT (EJ255) What's in the box? Set of 4 Injector Dynamics ID1750-XDS Fuel Injectors Universal Clips/Pins Warranty The Manufacturer warranty period is 1 year from the date of original purchase, and covers manufacturer defects. Is it more economical to push the EJ20 (after bullet proofing of course) to such numbers (with some additional bolt ons)? Keep in mind the car is a 4eat (will be rebuilt by IPT to handle the power) and turbo lag is also a main concern (I don’t just want to slap J-Spec Auto offers a wide range of Subaru EJ255 Engines. 🔹 Maintenance and Repair – recommendations for troubleshooting. The Stage 4 Tuff EJ25 Closed Deck Short Block will support up to 1000 HP in the Subaru STI. 5 L engine for informed ownership. Fans complained about the reduced power, but Subaru rectified the power gap with the increased low-range torque of the 230-hp Subaru EJ255 2. So, if i plan on keeping horsepower below 300, (AP3, intake, and downpipe) What do i need to do under the hood to make sure i can drive hard and not worry about truehello, I've got a usdm 07 legacy gt stock except a vf52 and an ebcs. Nov 30, 2023 · EJ255 vs EJ257 Engines: Key Differences Explained EllieB If you’re a Subaru enthusiast, you’ve likely heard of the EJ255 and EJ257, two of the brand’s most iconic engines. Power 210–265 hp (157–198 kW; 213–269 PS) EJ255 Version 1: Used in the 2005 and 2006 Legacy, as well as the 2004 and 2005 Forester. 5L H4 engine in this detailed guide. The turbine wheel was upgraded (TD04L-19T) for the 2008 MY only before the WRX received the Legacy GT style induction system in 2009. For daily driver , not looking for crazy power gains. In this video, Zach breaks down the best performance mods for the Subaru EJ255 engine and how a few key upgrades can push it to 300 WHP. Are there "safe" power mods? I'm guessing TMIC, up/down pipes and exhaust just increase efficiency, not boost. But assuming it was stock what would i need to replace to get 400 to 450whp safely and reliably without breaking the bank. All of the other 2. 5l are thinner but it is a semi-closed deck, compared the the 2. Aug 14, 2022 · Hey guys im looking to make more power out of my EJ255 its not stock right now but im not sure of what was done to the engine internally as it was done by the previous owner. 5-liter Nissan engines for sale including the EJ25D, EJ251, EJ252, EJ253, EJ254, EJ255, EJ257, FB25b, & FB25D; Subaru XT. Mar 26, 2013 · Hello I've been trying to find a thread that explains the difference between EJ25 engines from 98 to 08. Each kit comes with billet crankshaft, forged pistons, forged connecting rods, and engine bearings. IAG's 550 Subaru EJ25 Long Block Packages are a valve cover to valve cover, crate engine. Th? first generation of EJ255 has open deck short block, and DOHC heads AB650s with variable valve timing system AVCS on the intake camshafts. May 29, 2016 · I'm looking for some advice. 4:1 Compression ratio Version 2 This newer version of the EJ255 came in the 2006-2008 Subaru WRX models, the 2007-2009 Legacy GT, and the 2006-2013 Forester XT. Great for WRX STI enthusiasts seeking a "drop-in" engine package. Depending on driving style. Nov 25, 2019 · In the US, the only car that has an engine designated as an EJ257 is the STI. i havnt seen stock dyno hp yet but i think its like 210-220. Also on the EJ255, for the Japanese Forester STI, was a VF41 turbo. I've known that this was gonna happen at some point but I'm just not sure what I need to upgrade on my engine and what I can keep stock. Learn about the 2. Subaru EJ255 Crate Engines The Single AVCS Subaru EJ255 Crate Engine is one of our most popular builds. This engine is part of Subaru’s renowned EJ series, which has been a staple in the automotive industry for its balance of power and efficiency. The EJ255 has been produced since 2004 and is installed on charged versions of such popular models as the Impreza, Legacy and Forester. Aug 23, 2022 · FA20DIT engine vs EJ257 engine. For reference, my EJ255 was turbo from the factory and with just an intake, exhaust, and tune made 280whp/350wtq. We review and look at EJ25 tuning and point out the premier modifications for your car. So far my planned build includes - Forged internals (Rods/Pistons), stock crank and closed My sti is sitting at 115k miles on the stock block, we know what the means lol. Looking for things like complete parts list, assembly guide, torque values, etc. I am looking to do a turbo upgrade and i need to know how much hp i can get out of the wrx engine if i put a new trany on it? Jan 31, 2024 · Hi guys! I am currently learning to tune boost on my 2014 wrx. 5L Subaru EJ255 flat-4 cylinder engine, including EJ255 specs, common modifications, and comparisons with other engines like the EJ25 Nov 8, 2023 · Ultimate guide to the best Subaru EJ255 mods to make a 300+ wheel-horsepower WRX or Forester, including downpipes, intakes, and intercoolers. 5L, 4 Cylinders engine is compatible with 2008 2009 2010 2011 2012 2013 2014 Subaru Impreza WRX models, comes a I am picking up a completely bare Ej255 block and was looking for an extensive overview on building up the engine. 0 liter turbocharged engine that is becoming fairly popular lately with people that are looking to swap a JDM engine into their USDM Subaru. 0L Turbo Powertrain (EJ Series Factory 2. Nov 9, 2023 · Ultimate guide to the Subaru EJ255 vs EJ257 2. 5 L for informed ownership. 5 liter boxer engines. is this correct? dip in graph is due to a hole in the fueling table. I want to make sure my Fozzy lasts a long time. Bought it as a project car to learn efi tuning. Maybe ETS Quiet, or Cobb Titanium. Feb 15, 2021 · The EJ20X and EJ20Y engine is a 2. 5L Engine? Is it good or bad? Read about Subaru EJ25 2. Solutio true/r/WRX is a place for Subaru fanatics to show off their rides, discuss modifications, mechanical issues, industry news, and more. Subaru EJ255 are popular blocks and with the right performance tuning mods like a remap, turbo upgrades and camshafts you will definitely enhance your driving experience. The time now is 07:49 PM. 5-liter flat-four configuration, commonly referred to as a boxer Dec 31, 2016 · Due to all this, Subaru EJ255 shows 210 HP at 5,600 rpm. Jul 1, 2021 · Discover the Untamed Power of Subaru WRX Engines - A Comprehensive Guide to EJ and FA Variants, Pros, Cons, & Building for Serious Horsepower. I was told that the EJ20Y has the same power of a EJ255 however I want to get whichever one would be more reliable for my WRX. Good for stock frame upgraded turbos or up to 500 WHP upgrades. 5 liter turbo EJ series engines are designated EJ255. The EJ255 features a 2. 0L Turbo) Sep 10, 2020 · Legendary Japanese Tuning Platforms When it comes to making high-performance horsepower with a Subaru engine, the breadwinner has always been the EJ family of engines. The EJ25 lineup also includes the EJ25D, EJ251, EJ253, EJ254 and EJ257. wfljomwtkssbhkeiyzvxhirtjnxaszwzlvzogqkgnkgybldqlwdfdxqyiruuzqsqvnbhskuicisltxqlqp