Wrx sti stock boost psi 093 mPa = 13. Feb 26, 2019 · Gotta say that this is wrong. 0L Turbo) Welcome to the North American Subaru Impreza Owners Club STI is 14. 82a/r 385whp @ 20psi / 500whp @ 28psi c-16, 11. Aug 8, 2006 · Stock boost is pretty much what Jae said. The OEM tune tends to overboost at times (especially in lower gears due to "integral windup" with the PID boost control) since the actual boost target is around 16 PSI. My 18 has crept up into the 20's so it does happen and even other 15+ STI's creep into the 20's too. You Aug 6, 2004 · On a tuned stock turbo car you can run 17psi max, or whatever your tuner thinks is safe. 1psi stock, 19. 5 PSI and makes additional power up to about 16-17psi. Our cars usually cut out around there and we lack the forged internals and block modifications necessary to run higher boost all the time. x psig that some have reported) without Oct 16, 2018 · My STI held boost around 15. Apr 6, 2014 · You are correct, the 15. I Mar 11, 2007 · A decatted STG2 wrx(mid pipe cat is ok) you can run well over 20psi w/ an aftermarket TMIC. but it’s only peak boost, it was only holding the 16/17. How many of those is 13. This is where the closed deck blocks from companies like IAG with their Stage 2. Jump to Latest 50K views 14 replies Stock boost is between 14. 5-14. I dunno about the STI, but the 2015+ WRX's have an over-boost feature that creates a fun little boost spike for a split second when you get on the throttle. As a general rule, 18psi(on 93 octane) is the boost at which the compression ratio of a stock wrx engine is pushed close to its limits. check oppositelock on nasioc. So your stock WRX holds 22. 18 STI has target boost set at 16 psi. The real reason why most stock turbo tunes have tapered boost at the end is the fact that the stock turbo isn't properly balanced to push much more than 19psi at peak flow -- past that point you will over spin the turbo past the balance point -- if you Mar 1, 2024 · If the STi has a max boost limit of 14. 2 psi on my base model. It's like it's stuck in intelligent mode. With alcohol injection you can push 20-22 psi tapering down to 12-13psi at redline. I'm tuned for 20 psi and can spike to 21. Is 11. the peak boost is literally meaningless. keep it to ~17 psi for the intercooler. 300 whp and 333ft/lbs were the final numbers. Everything stock except an Invidia Q300 catback, catted downpipe, Cobb SF intake and Grimmspeed EBCS. 0. Nov 13, 2008 · As an example, let's say you turbocharge a naturally aspirated Civic engine. 6 PSI. To fix this, I would then reset the ECU by disconnecting the negative terminal on the battery for a few minutes and then reconnect. Two days ago the dealership replaced my spt boost gauge with a new one cause it rattled. In 2nd gear you should be able to hit 14. yes, just because a turbo is producing higher PSI, its not necisarily making more boost, this is what they refer to as "just blowing hot air" and is why larger turbos can put out more CFMs at lower PSI. etc. 5. Nov 25, 2008 · i just got a 2006 sti and i had bought it from a dealership that had it as a trade in. You don't need it w/ the StreetTuner. And hit "enter" to reset the gauge. The boost doesn't stay there more than a second as the boost control catches up. 2 psi. 5L Turbo Powertrain I thought that max boost for STi were 16. After this or even at 18psi on 93 octane, the timing will have to be retarded a bunch to avoid detonation. 0L Turbo Powertrain (EJ Series Factory 2. How much boost does a stock wrx, non-sti make? (2015-2021) I have a buddy with a 1. This is my experience with my car and with what I've read on this subject. Boost has increased from11 to 12. After doing this, then it's back to normal, but this would happen over and over. 2) and the good gauge read 20. Jul 16, 2014 · Stock STi Boost Question Factory 2. 5 PSI? I did the break-in staying under 4K RPM (mostly under 3K or The "Overboost" feature (programmed in boost spike) will let it hit 22. May 5, 2007 · The TD04 is the stock WRX turbo, I believe he was asking about the stock STi turbo whichi s a VF39. x psig that some have reported) without engaging the limiter. Jul 2, 2006 · what's stock boost on sti? Newbies & FAQs. This may sound like a stupid question, but what is the stock boost pressure for the WRX? I have the stock boost gauge, and at full boost it reads . I hooked up both gauges to the same pressure source (compressed air cylinder with a regulator) and brought the pressure to 20 PSI. Apr 13, 2015 · I've had my car for a few months now and I am wondering if I am hitting boost. 5 psi on the first gear because it is too short and you need to shift to 2nd before you make full boost. However, this boost limit must be exceeded continuously for over 2 seconds, so you can certainly see peak boost in that range briefly (or even 22. I've heard of people running 18 psi, but that's well outside the efficiency range of the stock turbo. all i know is it runs about 21 psi at 4000 rpms and Dec 15, 2016 · Max boost is 14. 9 shows max due to the 15 WRX, the 14. 5 psi) - does the Feb 7, 2008 · The way I always remembered it was that the stock WRX runs 13. WRX held 22. The stock turbo IS efficient to over 20psi in midrange, you should taper to ~14-15psi at topend. Try not to make your peak boost a "high score" meter It takes perfect conditions and throttle at just the right revs to hit that 22. quick side question: what is the optimal boost in psi for stock td04, and stock engine, if tuned correctly? i read Sep 14, 2015 · Your just starting to boost and then open the throttle wide to spike it. He failed to mention that aftermarket engine management and exhausts will change this though. 5psi stock, 17. Oct 21, 2008 · Allworldcars. 7 psi is stock on 15-17 STI's. When I had my STi I got tuned for alcohol injection at about 22~ psi and I didn't have any issues. The quickest stock turbo wrx pushes 22 psi and runs 12. 5 to 16. I noticed this morning that my boost gauge read 22. so if u swap a td04 into the leggy and up the boost ull have to use an mbc to up it anything abouve probably 8 psi due to the leggy's stock BCS Mar 14, 2004 · 3. 5psi. I recently took it in for 5k mile service (not saying its related). 5? Apr 30, 2013 · Likewise, the reason why I personally will not push an OEM IHI turbo past 19 psi at redline has nothing to do with the compressor efficiency. Any more than that could damage gaskets, etc. Jan 13, 2013 · Tech & Modifying & General Repairs. Beyond that it just blows hot air, although it won't be putting out enough power to blow your stock engine internals very easily. volume and temp. ” Apr 13, 2004 · Stock Boost on WRX Newbies & FAQs Stock boost is 13. 1 on your boost guage Any more and I'll add em on here. This modification is like a boost controller except for the fact that it can’t be adjusted. 0l WOT on the stock tune, it spikes up in the ~20psi area by like 5500rpm if i remember correctly. 1. 5 psi with no problem. Roll down the driver window, then roll it back up and hold the window switch (pulled up) for 10 seconds to reset the window functions. 7K views 9 replies 3 participants last post by zax Jun 3, 2021 May 28, 2006 · What is the stock boost and max boost that a stock '04 STi can take? i believe it is 14. 08 MPA, which is around 11. The boost gauge read just over 20 (like 20. Since I've installed my uppipe and tbe I hit 10 psi in 1st and 2nd, and it goes up to 15 psi in the rest. We invite you to join our Subaru Impreza WRX and STi . However, this boost limit must be exceeded continuously for over 2 seconds, so you can certainly see peak boost in that range briefly on the factory tune (or even 22. It being winter, I haven't had the stretch of road to safely take it through all gears/rpm's and monitor the gauge. “According to the WRX's gauge cluster, boost peaks around 12. Welcome to the North American Subaru Impreza Owners Club: Sunday September 22, 2024 Jul 30, 2007 · My '95 ECU is the Z4 so I guess I should be running a bit over 12 psi stock (like any of the JDM MY95-96 non STi ECU's). This engine came from a GF8 that for '95 was rated @ 220PS with a TD04 Turbo (according to the IMPREZA hard covered book). it came with the boost, exhaust temp and oil pressure gauges but i have no way to contact the old owner and im not sure if its been tuned or anything. Mar 7, 2006 · stock internals? Stock turbo? the STi has a bigger turbo so makes more power from that, not just more boost. 5+ after stage1. 09 bar then it drops to 1. 5 PSI so roughly just shy of . 2005 Impreza WRX STi WRB-Gold. It's sort of like comparing apples to oranges. You will not be able to hit 14. Nov 5, 2015 · I have a 2016 fully stock STi and I'm wondering what are normal boost ranges for the car? I've seen youtube videos where the boost gauge is almost pegged. 3 psi, far lower than the 22 psi that the turbo in the outgoing car occasionally climbs to. 14. 5psi max for a split second before coming down. For Example if you want to run 15 psi, you could not achieve this medium between stock and the maximum safe running boost. Jan 9, 2003 · The stock BOV is designed to start blowing off boost around 12 psi(don't know the BAR equivalent) to assist the wastegate with controlling overboost. I ran local auto X a couple time, I drove hard at 8000miles. Apr 7, 2008 · But, back to the OP's original question - There is no magic number for max psi since a td04 can run at 25 psi and only flow a tiny bit of air while a an FPGREEN at the same psi would place significant stress on even a well built motor. On a WRX/STi, 17/18 lbs of boost is not an uncommon number for an average/reliable Stage 2 setup. 5 PSI A: . A couple weeks later I noticed my peak boost increased from 17 point something to over 18. I’m thinking this could be over-boost because under acceleration, the boost gauge hits 17. That's pretty low. What peak boost you guys get on your STI? Have peaked at 18. 5 (1 psi less than the STI) and the STi (I) runs 14. Is this right for a stock STi? I thought they were 14. 6psi. Engine Modifications Jan 11, 2005 · Stock 02 WRX boost pressure Factory 2. 7 psi. Sep 6, 2012 · Re: Only 10 PSI of boost Intermittent Wastegate Boost 10psi 2006 STi, Stock Turbo, Stage 2 – Yes, I Researched - NASIOC I am having a similar issue as well, posted a huge thread on it. On a stock head it is suspected that ~26-28 psi the valves will start to float with any significant airflow. Save Share Reply Quote Like the peak boost reading doesnt mean shit, its a momentary pressure spike that doesnt actually translate into any acceleration. 5 PSI Q: My stock boost guage reads in mPa. I put a K&N filter, eliminated second filter which attached to box. 6 psi). After a day of driving I usually see 18-20. 05 holding in the lower RPMs and steadily decreases ending about about . 7 psi as intended. it has an aps cold air and an invidia 3'' exhaust. 7-8 lbs of boost might be a really high number for that engine. Dec 16, 2019 · At around 500 – 550 whp, and/or if you are making over about 24 psi of boost or more, the stock cylinders would need to be reinforced to hold that power reliably. 3 once and reset it. Subaru did not immediately have an explanation for the dialed-down turbo output, but it's possible they're sandbagging the WRX to leave room for the upcoming STI model. 7 is still the stock rated max on the 15 STi and yes the tune is different than say a 14 and older STi. 8l i4 that only boosts to 9 psi, and makes around the same power as the wrx. 7's or so. Sep 29, 2017 · Just wondering what the stock boost psi is on a 2016 wrx. 97 bar at the end of the RPM range. If you're thinking about pushing the stocker, don't go much over 17 psi. I spent a lot of time tuning boost control to avoid the overboost from integral windup between 3-4K RPMs. 1 PSI throughout the RPM's Jan 16, 2005 · Stay away from the boost controller. VA STIs have an EJ25 and also a different turbo than the VA WRXs, if I understand correctly the WRX turbos are smaller and spool faster and thus do higher boost than the VF48 on the STI. May 21, 2012 · Stock boost 2012 sti. etc Jan 30, 2014 · So I have had my 2014 wrx for about a month and a half. May 3, 2004 · The lower the boost, the safer the setup (given all else is equal). 08 mPa (11. Replace the intercooler and without a turbo upgrade there's no more peak power than a ~17psi tune will provide, you're filling in power in the 3000-4500 RPM range, but near peak power and above the boost is tapering, so you aren't gaining peak power. The peak you see is the result of the Boost control solenoid not being able to bleed off fast enough. Oct 11, 2004 · In 4'th gear I'm hitting peak of 1. 100% normal for your stock WRX. After that I noticed that I wasn't getting full boost at full throttle anymore. 5 psi or 0. Dec 26, 2022 · I have a 2022 wrx base model. Idk if the gauge is wrong or if that's normal? Mar 26, 2006 · no, the stock boost guage reads in megapascals or mPa Here's a faq! Q: What's the stock boost of a 02-05 WRX? A: 13. Typical stock numbers for an STI on the hub dynos are 245 whp and 255 ft/lbs. 5 and up come in. 08-31-2016, 01:38 AM #13: shakur45. Dec 7, 2010 · My engine is tuned to just over 19 psi and was tuned while connected to Dynapack hub dynos. The difference is all 224 horses and 226 pound-feet are available 800 rpm earlier Jun 12, 2006 · 2002 WRX w/ JDM STi 6spd, EJ255, VF39 & EWG. Scooby Specialist Feb 2, 2009 · Well, I just now checked the boost gauge against an expensive known good pressure gauge. 8, the wastegate spring is a 7 psi spring. 5 at times. Apr 28, 2021 · high boost 2021 wrx Jump to Latest 9. Aug 30, 2016 · 2017 stock sti boost pressures? General Community 2015 WRX STi WRB. 5 psi (Page 11 or so in the factory 2003 Impreza brochure) STI 2 NV. This is working as designed, initial boost will peak at 17. if you pay attention, your boost will settle to about 16 psi stock in normal weather. I struggle to get up to 17 PSI when I am really getting on the car. If you pay attention to your gauge while accelerating you actually only hit about 17 at Max. 6 psi normal assuming PO did not adjust boost at all? (PO didn't) You aren't actually running at 20. Not sure how you're getting 17 psi; that is stage 1 level. Jan 14, 2008 · the stock psi on a wrx is 13. I thought I read somewhere that the STi pushes . And for those of you who have/want a MBC or EBC, a friend w/ an STi just found out his compression in his 4 cylinders are 120 psi, 103 psi, 100 psi, and 60 psi. That's normal if you have had the battery disconnected. 2 after stage1 plus. 5 psi stock. Nov 11, 2005 · Yes, the stock peak boost is 14. Dec 17, 2013 · WRX intercooler is prone to splitting at high boost. I run 22-23psi on a TD05H-20G on the original EJ205(WRX engine from 2002-2005). It's at about 1700 miles on it. My owner's manual says it goes up to 22. x psig. Stupid creep anyways. 1 psi boost. It's totaled. Well I noticed now it's going to 16 psi then at 4500rpms it dropped down to around 12. 5 psi. The boost limit fuel cut (and P0244 DTC) is effectively set to around 4 psi above the boost target, which would put it around 20-21. but that was a few years ago, and i’m not stock turbo anymore lol the boost gauge needs a pill or long line, the stock gauges are not using the MAP sensor from the ecu, but have a small sensor that come from the turbo side vacuum line, and people were reporting not finding a pill in the line when they were investigating the boost reading. The OEM boost control solenoid is a bleed type system. 9 Bar. 09 bar is just under 16 so boost seems to be hitting peak around 15. 5 psi Jul 3, 2021 · No, I actually had a boost spike once on the stock tune to ~19 psi. Aug 12, 2006 · 05 STI Perrin GT30R . 2psi, rev limit also increased to Jun 26, 2007 · Stock Boost on an 04 STi Newbies & FAQs 1st and 2nd gear only produce 9. I have a Greddy type-S on my car , which can be set to hold 30+psi. That’s not to say your car CANT push more boost, EJ25s can handle significantly more than their stock tune and boost control gives them. Jun 16, 2016 · Not sure when it started necessarily, but my 2016 Sti Limited is only get about 7 - 8 PSI max boost. Feb 4, 2004 · Therefore this mod allows you to max out your turbo at 17 psi without purchasing something costly like a boost controller. Please feel free to follow, as I am aggregating threads that have similar issues. 3 @ 123 First time to the track on stock block! Fully closed-decked built motor with custom forged JE Pistons, Forged H beam rods, ACL race bearings, subaru 11mm oil pump, 1/2' ARP headstuds, new 08 Nitrided crank, Supertech dual valvesprings with ti-retainers, etc. Feb 15, 2024 · Regarding the boost pressure (psi), it's important to note that the stock boost levels in a WRX can vary depending on the model and year. Going WOT from a vacuum condition say when doing a 3rd gear datalog you won't see the spike. com says in the new WRX, boost pressure has been tweaked down to 11. 9 psi, creating peak power and torque numbers identical to the outgoing WRX’s. At 3000 RPM's in 3rd gear, car hits around . Currently at 6200ft above sea level and only have 4K miles on my 21 STI limited. Boost(psi) is a dynamic measurement, since 2 factors mainly affect measured boost. Boost increased to 15. Sep 30, 2013 · Relative noobie here. 5 psi, then am I over-boosting a few psi as my boost gauge shows peak boost at 17. So it looks like the boost gauge is pretty accurate. Scooby Specialist . And my car is stock, but damn that seems high. 5 psi but that is just a spike your running 14. Is this what my WRX should boost? I only have a Greddy cat-back exhaust installed. 6 days ago · I have a stock 2020 STI. 1 mPa (14. 3rd-6th is 14. . The block CAN handle 20+psi repeatedly properly tuned. Member#: 31748 Feb 3, 2008 · hey what does a stock sti run? (psi) Not sure but I believe the EVO's run much higher boost levels from the factory- something like 17 or 18psi on the 4G63T 2. However, the range you mentioned, between 19-20 psi, is within the normal operating range for many WRX models. Oct 28, 2002 · STi run higher boost but their engines are thoroughly built up for higher levels of boost, they can easily take 17-18 psi. 2 psi for a second and then drops back to around 15 psi during acceleration. Save Share May 7, 2005 · In 1st and 2nd gears, boost is limited to 8 psi. Lately, my boost doesn't go past 10psi even in sharp sport mode. The highest I've seen was 22. Jul 4, 2018 · Therefore, the boost no longer gets limited until DAM reduces again to a point ECU limits the boost back to 8 psi. the stock turbo runs stock at 13. other than that, it's completely stock. It's just a spike that's notorious for the FA20 engines and wrx's. lpfsjom jpfl nxcn eswmcxue bjhms iiryr nghatcg wqta llkv sdsd