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Old 05-22-2019, 01:24 PM   #26
SatinWhitePearl
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It was my understanding the RAs had the sodium filled valves and not the 19s, only the RAs - feel free to correct me.
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Old 05-22-2019, 01:42 PM   #27
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Originally Posted by SatinWhitePearl View Post
It was my understanding the RAs had the sodium filled valves and not the 19s, only the RAs - feel free to correct me.
Some say it has them, others say that it doesn't. Subaru didn't announce anything about them and I haven't seen any definitive proof. However, the valve set part numbers are different for 2019 from both the '18 STI & '18 Type RA.

2018 STI
11018AA500
11019AA500

2018 Type RA
11018AA910
11019AA500

2019 STI
11018AA930
11019AA970
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Old 05-23-2019, 02:23 PM   #28
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Originally Posted by WRXnick16 View Post
Especially the S209.. the forged internals will be very brittle.

I've seen a few people claim that the 2019/Type RA blocks have weaker pistons and are more prone to ringland failure..

They've only been out for a year.. how is there sufficient data to prove that ringland failure is statistically worse for the 2019/Type RA engine? Because a few modified STI's have reported issues on the forums or social media?
  • There will always be people with failures that are stock or tuned (at any power level). This can be the result of driving habits, tuning (both parts & the tune), and maybe manufacturing to some extent.
  • On the other end of the spectrum, there will be people pushing huge power on stock internals while straddling the mechanical limits. Again, how long it lasts will depend on the power level, quality of the tune, and driving habits. Maybe it's just a dyno queen and rarely sees extended periods of abuse. Maybe it goes to the track every weekend an is abused for hours.. in which case it likely won't last as long.
I don't think that every 2019 STI owner can reliably expect 500+ whp for all driving conditions. At the same time, I seriously doubt that the redesigned 2019 pistons are weaker than the previous years.. It'll take a lot more time and data to come to a consensus on a realistic "limit".

Being on an enthusiast car forum, we're always going to hear about the worst-case and best-case scenarios.. and less of what happens to the bulk of the people in the middle. Experienced tuners will have the best idea after they've worked with a lot of cars with the redesigned pistons. Subaru wouldn't have invested the time and money in designing new pistons just for them to be weaker and result in more failures/warranty repairs.
Exactly! I think we tend to hear more of the negatives because of the nature of forums in general. People love sharing the horror stories more than the successful ones.
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Old 09-16-2019, 03:37 PM   #29
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the ones that work are driving around having fun.
the horror story are sitting at home on the computer.
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Old 09-19-2019, 01:24 PM   #30
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Originally Posted by psc77 View Post
the ones that work are driving around having fun.
the horror story are sitting at home on the computer.
This ALL DAY
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Old 09-19-2019, 05:19 PM   #31
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why wouldn't a manufacturer make more design flaws? more money from people bringing broken cars to the dealer! jk lol things happen, its frustrating...im one toting the line for power on stock internals! hoping it doesn't come apart to soon [email protected]
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Old 09-19-2019, 05:44 PM   #32
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IDK what has been done and what hasn't but I do know that the RA/19 STi engine plain works. They made more HP at stage1/2 than previous years and I have many of them in the 400WHP range for over a year at this point without issue. I'm a big fan and it is a solid upgrade for pre 17 and below cars who are looking for "a little" more head room and don't want a forged block.
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Old 09-23-2019, 03:47 PM   #33
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IDK what has been done and what hasn't but I do know that the RA/19 STi engine plain works. They made more HP at stage1/2 than previous years and I have many of them in the 400WHP range for over a year at this point without issue. I'm a big fan and it is a solid upgrade for pre 17 and below cars who are looking for "a little" more head room and don't want a forged block.
Hey BrenTuning! you wer refered to me by "mywrxchannel" but anyways. what do you think about the 2018's? do you have any 2018's that are still good without issue around that 400HP? or are they just like the 2015-2017 block?
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Old 09-23-2019, 04:38 PM   #34
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Originally Posted by SDblitz858 View Post
Hey BrenTuning! you wer refered to me by "mywrxchannel" but anyways. what do you think about the 2018's? do you have any 2018's that are still good without issue around that 400HP? or are they just like the 2015-2017 block?
The 2018 STi unless it's an RA is the same block as the 15-17 cars so no difference in capabilities, I do have many in the 400WHP range but they are customers who understand they could get a $10K+ bill any moment lol.
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Old 09-27-2019, 03:24 AM   #35
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Originally Posted by BrenTuning View Post
The 2018 STi unless it's an RA is the same block as the 15-17 cars so no difference in capabilities, I do have many in the 400WHP range but they are customers who understand they could get a $10K+ bill any moment lol.
Oh damn! well that made me feel ****ty... so that means u have a lot 2018's that have issue then? less than 15-17? mine is currently stock at the moment, not until i comeback from deployment which is like really soon lmao... ur recommended by "thewrxchannel" for tune so yea, just been researching.lurking for a long time now..
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Old 09-27-2019, 02:54 PM   #36
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Originally Posted by SDblitz858 View Post
so that means u have a lot 2018's that have issue then?
He didn't say that.
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Old 02-05-2020, 07:34 PM   #37
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I love my stock 2019 with 17k miles that I Lug around daily.

I haven't seen anything concrete from Subaru officially laying out differences. Media/marketing is my only source of knowledge (intake, exhaust manifold, pistons, ECU, and transmission gearing.
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Old 02-05-2020, 08:04 PM   #38
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Originally Posted by Tk421STI View Post
I love my stock 2019 with 17k miles that I Lug around daily.

I haven't seen anything concrete from Subaru officially laying out differences. Media/marketing is my only source of knowledge (intake, exhaust manifold, pistons, ECU, and transmission gearing.
Kept it stock? How did you refrain...
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Old 02-06-2020, 08:50 PM   #39
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Kept it stock? How did you refrain...
I generally keep my cars stock-I like them for what they are plus I daily it. Additionally, even heavily modified these cars still wont be fast in terms of the dollars-to-speed ratio.

What power levels are guys getting in for 19's?
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Old 02-06-2020, 09:06 PM   #40
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Originally Posted by Tk421STI View Post
I generally keep my cars stock-I like them for what they are plus I daily it. Additionally, even heavily modified these cars still wont be fast in terms of the dollars-to-speed ratio.

What power levels are guys getting in for 19's?
17k on a 19'... that's a good amount of miles already.

Only thing I did so far was 18" wheels and tires. I do like it for what it is, but knowing the best bang-for-the-buck mod is really not that expensive to do, I must try it. That would be getting rid of the **** stock downpipe. The 2018 RA and 2019+ have higher flowing, slightly larger mid-pipe and exhaust compared to previous years from what I understand, so not sure it's that necessary to upgrade unless it's for the sound, or planning on more mods. It's also pretty quiet for using the car as a daily.
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Old 02-07-2020, 12:15 AM   #41
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Originally Posted by jcb-memphis View Post
Looking at the COBB site closely on their tune plots...the stock 18 seems to be down about 30hp/30-40ft lbs....just ball parking. I realize you cannot compare car 1 to car 2 on different days, different gears, but the way I am thinking about the 2019 with all the changes is that Subaru sort of dis a stage 1+ on the 19. I don't buy the 5hp number....it is like the 22b all over again. Anyone have really good dyne data with controls (same day......) pre 19 to 19...?


TIA.

Have a 19. Love the car. I definitely think the 19 is more zippy than the 18 I tested back to back....it was very noticeable....and my wallet wanted it to go the other way...no regrets. Love the 19 and keeping it stock..


jb

From all the info we have now over the past 2 years the RA was probably slightly under rated....some were getting 270-280 at the wheels completely stock. Given that the 2019 on up get the RA engine block there is probably trickle down with the tune as well.
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Old 02-07-2020, 12:16 PM   #42
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17k on a 19'... that's a good amount of miles already.

Only thing I did so far was 18" wheels and tires. I do like it for what it is, but knowing the best bang-for-the-buck mod is really not that expensive to do, I must try it. That would be getting rid of the **** stock downpipe. The 2018 RA and 2019+ have higher flowing, slightly larger mid-pipe and exhaust compared to previous years from what I understand, so not sure it's that necessary to upgrade unless it's for the sound, or planning on more mods. It's also pretty quiet for using the car as a daily.
The OEM downpipe is very very restrictive..its the same one since 2004....replacing the stock 2 cat downpipe with a free flowing 3" performance single catted piece will improve everything performance wise with the EJ257 with no downsides along with the appropriate tune. Cobb stage 2 makes it a couple hours in the driveway upgrade. Been stage 2 for 11,000 miles now and the car is noticeably faster, a little more aggressive out the exhaust relative to sound(especially under full boost), and the parts are stainless steel so wont rust.

Datalogging allows you to monitor the tune, lot of people use different downpipe than what the cobb stage 2 calls for....generally though if its an open bellmouth and single 3" cat mounted as far back as possible it will be OK. I went with a turbo XS and datalogs are perfect. Turbo XS is the least restrictive downpipe available, and the center section can be unbolted to switch from catted to straight pipe as they offer both.

Go Stage 2 you wont regret it.
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Old 02-07-2020, 05:34 PM   #43
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Originally Posted by BrenTuning View Post
IDK what has been done and what hasn't but I do know that the RA/19 STi engine plain works. They made more HP at stage1/2 than previous years and I have many of them in the 400WHP range for over a year at this point without issue. I'm a big fan and it is a solid upgrade for pre 17 and below cars who are looking for "a little" more head room and don't want a forged block.
do they have any additional tables, or fewer tables for that matter , to the timing fueling or boost that the prior years dont?
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Old 02-10-2020, 06:38 AM   #44
12wrx1
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Originally Posted by WRXnick16 View Post
Especially the S209.. the forged internals will be very brittle.
Edit: Since the S209 didn't receive forged pistons as planned

I've seen a few people claim that the 2019/Type RA blocks have weaker pistons and are more prone to ringland failure..

They've only been out for a year.. how is there sufficient data to prove that ringland failure is statistically worse for the 2019/Type RA engine? Because a few modified STI's have reported issues on the forums or social media?
  • There will always be people with failures that are stock or tuned (at any power level). This can be the result of driving habits, tuning (both parts & the tune), and maybe manufacturing to some extent.
  • On the other end of the spectrum, there will be people pushing huge power on stock internals while straddling the mechanical limits. Again, how long it lasts will depend on the power level, quality of the tune, and driving habits. Maybe it's just a dyno queen and rarely sees extended periods of abuse. Maybe it goes to the track every weekend and is abused for hours.. in which case it likely won't last as long.
I don't think that every 2019 STI owner can reliably expect 500+ whp for all driving conditions. At the same time, I seriously doubt that the redesigned 2019 pistons are weaker than the previous years.. It'll take a lot more time and data to come to a consensus on a realistic "limit".

Being on an enthusiast car forum, we're always going to hear about the worst-case and best-case scenarios.. and less of what happens to the bulk of the people in the middle. Experienced tuners will have the best idea after they've worked with a lot of cars with the redesigned pistons. Subaru wouldn't have invested the time and money in designing new pistons just for them to be weaker and result in more failures/warranty repairs.

Exactly this ☝
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Old 02-10-2020, 01:53 PM   #45
siete
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Originally Posted by NighthawkSTI View Post
The OEM downpipe is very very restrictive..its the same one since 2004....replacing the stock 2 cat downpipe with a free flowing 3" performance single catted piece will improve everything performance wise with the EJ257 with no downsides along with the appropriate tune. Cobb stage 2 makes it a couple hours in the driveway upgrade. Been stage 2 for 11,000 miles now and the car is noticeably faster, a little more aggressive out the exhaust relative to sound(especially under full boost), and the parts are stainless steel so wont rust.

Datalogging allows you to monitor the tune, lot of people use different downpipe than what the cobb stage 2 calls for....generally though if its an open bellmouth and single 3" cat mounted as far back as possible it will be OK. I went with a turbo XS and datalogs are perfect. Turbo XS is the least restrictive downpipe available, and the center section can be unbolted to switch from catted to straight pipe as they offer both.

Go Stage 2 you wont regret it.
Yeah, I already have the downpipe. I went with the Invidia catless divorced wastegate design. Has an extra WB02 bung in the bellmouth. I am going single exit exhaust as well, it's not my daily driver.

I plan to load the OTS Cobb stage 2 maps and then log and fine tune from there on my own. I'm also installing a larger pump and injectors. That's as far as I'm going for awhile... eventually upgrading the turbo most likely.
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Old 02-10-2020, 06:23 PM   #46
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Yeah, I already have the downpipe. I went with the Invidia catless divorced wastegate design. Has an extra WB02 bung in the bellmouth. I am going single exit exhaust as well, it's not my daily driver.

I plan to load the OTS Cobb stage 2 maps and then log and fine tune from there on my own. I'm also installing a larger pump and injectors. That's as far as I'm going for awhile... eventually upgrading the turbo most likely.
you may get boost spikes with the catless downpipe as the cobb map is tuned for a 3" free flow cat. I deviated from the cobb specs and used a Turbo XS downpipe but its the closest design to the cobb downpipe and I used an adapter so it even mimicks the cobb neck down. My boost curve peaks at 3400 RPM at 18.4 Lbs and tapers to 15 at 7000 RPM.
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Old 02-10-2020, 07:40 PM   #47
siete
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Originally Posted by NighthawkSTI View Post
you may get boost spikes with the catless downpipe as the cobb map is tuned for a 3" free flow cat. I deviated from the cobb specs and used a Turbo XS downpipe but its the closest design to the cobb downpipe and I used an adapter so it even mimicks the cobb neck down. My boost curve peaks at 3400 RPM at 18.4 Lbs and tapers to 15 at 7000 RPM.
Yeah, I'm expecting boost creep with the catless DP. I plan on doing some fine tuning to keep it safe where that happens. I may install an EWG, but trying to avoid that. I'd rather go with a larger turbo eventually.

The stage 2 map notes say you can use an alternative high flowing catted turbo-back exhaust, but if it doesn't flow as good, boost targets may not be reached. It seems like you have reached the target with the Turbo XS DP.
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Old 02-11-2020, 12:53 AM   #48
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Yeah, I'm expecting boost creep with the catless DP. I plan on doing some fine tuning to keep it safe where that happens. I may install an EWG, but trying to avoid that. I'd rather go with a larger turbo eventually.

The stage 2 map notes say you can use an alternative high flowing catted turbo-back exhaust, but if it doesn't flow as good, boost targets may not be reached. It seems like you have reached the target with the Turbo XS DP.
the datalogs look good...could probably even up the boost a little more. I could swap out the catted section for their straight pipe in 10 minutes and see what happens....id be more worried about it leaning out honestly. Never had any knock in the current set up though either...so I might be able to get away with the straight pipe. I have a 3" perrin inlet too...but I asked cobb about it and they said its fine...
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