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Old 04-12-2018, 08:07 AM   #1
AVANTI R5
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Default More Power Coming To The 2019 STI?

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Old 04-12-2018, 09:14 AM   #2
RobM
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+5 HP

Game changer
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Old 04-12-2018, 09:29 AM   #3
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Quote:
Originally Posted by RobM View Post
+5 HP

Game changer
From the reviews I've read (on the RA engine), although it's only a 5hp peak bump, it's much improved below 4k RPM's, where the STi is a bit flaccid, so the area under the curve has increased, which is more important than a peak number. Assuming this is the same tune and/or engine in the 2019 as the 2018 RA, it's actually a notable improvement to the STi.
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Old 04-12-2018, 09:37 AM   #4
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LOL

Keep milking that EJ Subaru.

Who gives a crap - most folks tune the car well past what any mildly hotter stock tune would provide, so it’s a net gain of exactly ZERO. Now if they beefed up a bunch of the internals, that something different, but I’m sure they didn’t...
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Old 04-12-2018, 10:04 AM   #5
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Originally Posted by Brahmzy View Post
LOL

Keep milking that EJ Subaru.

Who gives a crap - most folks tune the car well past what any mildly hotter stock tune would provide, so itís a net gain of exactly ZERO. Now if they beefed up a bunch of the internals, that something different, but Iím sure they didnít...
First off: not trying to defend the EJ here.

Most folks drive their car stock until the warranty period is up, or keep it stock for their ownership period. I'm not even sure most people on this forum start modding right away.

As for gains with this updated EJ (again, assuming it's the RA engine) you get a better rotating assembly from the factory, as well as a better factory tune, while maintaining your warranty; does the EJ need to shuffle off to the retirement home? yes; but does the FA20/FA24 need to be rigorously tested prior to plunking it in the Subaru's top tier performance car? also yes.

Subaru isn't likely to stuff an entirely new engine into a chassis that is at the end of it's life cycle and re-certify it, especially something that moves as few units as the STi does.
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Old 04-12-2018, 10:57 AM   #6
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Wonder how much more they will charge now
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Old 04-12-2018, 11:19 AM   #7
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If you have driven the STI and the WRX you will understand how the dual direct injection system really punches torque in bottom range so the 5 more HP is just icing on a nice cake. Especially if they stay with 2.5 L in STI.
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Old 04-12-2018, 11:22 AM   #8
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This change is better than no change for those that still are interested in paying new car price for a piece of history in the EJ257. The change to 19" wheels (to now match the competition) really slowed the 2018 STI down so any additional power is welcome.
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Old 04-12-2018, 11:29 AM   #9
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Quote:
Originally Posted by Masterauto View Post
If you have driven the STI and the WRX you will understand how the dual direct injection system really punches torque in bottom range so the 5 more HP is just icing on a nice cake. Especially if they stay with 2.5 L in STI.
Excuse my ignorance as im a newbie, but the sti has direct injection? Thought it still used port?
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Old 04-12-2018, 11:39 AM   #10
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Excuse my ignorance as im a newbie, but the sti has direct injection? Thought it still used port?
He is talking about STI (port injection) vs WRX (direct injection). The STI has never had direct injection, maybe in the next millennium.
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Old 04-12-2018, 01:09 PM   #11
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Originally Posted by Sid03SVT View Post
First off: not trying to defend the EJ here.

Most folks drive their car stock until the warranty period is up, or keep it stock for their ownership period. I'm not even sure most people on this forum start modding right away.

As for gains with this updated EJ (again, assuming it's the RA engine) you get a better rotating assembly from the factory, as well as a better factory tune, while maintaining your warranty; does the EJ need to shuffle off to the retirement home? yes; but does the FA20/FA24 need to be rigorously tested prior to plunking it in the Subaru's top tier performance car? also yes.

Subaru isn't likely to stuff an entirely new engine into a chassis that is at the end of it's life cycle and re-certify it, especially something that moves as few units as the STi does.
With the RA, it is already certified. And we don't know it's "end of life" yet. We could be getting it for 2-3 more model years for all we know.

Quote:
Originally Posted by Pre View Post
He is talking about STI (port injection) vs WRX (direct injection). The STI has never had direct injection, maybe in the next millennium.
I was also thinking his "dual direct.." statement as him thinking it had the D-4S system. And, of course, it doesn't.



IF the '19s come with the RA engine, I see a surge of STI sales.
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Old 04-12-2018, 01:35 PM   #12
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Quote:
Originally Posted by JustyWRC View Post
IF the '19s come with the RA engine, I see a surge of STI sales.
For an extra 5 hp? I can't see it. WRX/STI sales are pretty consistent so I would imagine it's enough to keep 2019's in line with 2018 sales but I wouldn't expect sales to increase because of such a minor change as there's still no Apple Carplay or Android Auto which stings more every year that it becomes standard in the rest of the industry and still has the same dated looks.
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Old 04-12-2018, 01:37 PM   #13
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Originally Posted by JustyWRC View Post
With the RA, it is already certified. And we don't know it's "end of life" yet. We could be getting it for 2-3 more model years for all we know.
I was talking about Subaru not being willing to re-certify for the rumored FA24 in a chassis that is at the end of it's life cycle.
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Old 04-12-2018, 02:13 PM   #14
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When it comes to the turbo EJ25, any power figure needs to be discussed in relation to octane level in the fuel.
Owners of the "RA" EJ257 will only get more power under the curve with 93 AKI gas in the tank; us here in Cali won't see **** as far as extra power below 4K.
That is unless we get the engine carefully remapped for our fuel; which is something no owner should have or should need to do in a brand new $40K+ car.
Now, if I were to buy a used STI, sure I'd play the game; but, a brand new STI? Heck no.
Instead, give me Golf R, plays nice on Cali 91, give me CTR, plays nice on Cali 91, give me a FoRS, plays nice on Cali 91.
In fact, give me virtually any new car without an EJ25 turbo under the hood and I guarantee it plays nice or, at least nicer, on Cali 91 .
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Old 04-12-2018, 02:27 PM   #15
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Quote:
Originally Posted by heavyD View Post
For an extra 5 hp? I can't see it. WRX/STI sales are pretty consistent so I would imagine it's enough to keep 2019's in line with 2018 sales but I wouldn't expect sales to increase because of such a minor change as there's still no Apple Carplay or Android Auto which stings more every year that it becomes standard in the rest of the industry and still has the same dated looks.

Is all you see is the HP? Isn't the motor built with stronger internals? I wasn't saying if all it was was equal power that it will surge. I am saying if it IS the RA motor, it will.


Quote:
Originally Posted by Sid03SVT View Post
I was talking about Subaru not being willing to re-certify for the rumored FA24 in a chassis that is at the end of it's life cycle.
Ah. Got it.

Quote:
Originally Posted by neg_matnik View Post
When it comes to the turbo EJ25, any power figure needs to be discussed in relation to octane level in the fuel.
Owners of the "RA" EJ257 will only get more power under the curve with 93 AKI gas in the tank; us here in Cali won't see **** as far as extra power below 4K.
That is unless we get the engine carefully remapped for our fuel; which is something no owner should have or should need to do in a brand new $40K+ car.
Now, if I were to buy a used STI, sure I'd play the game; but, a brand new STI? Heck no.
Instead, give me Golf R, plays nice on Cali 91, give me CTR, plays nice on Cali 91, give me a FoRS, plays nice on Cali 91.
In fact, give me virtually any new car without an EJ25 turbo under the hood and I guarantee it plays nice or, at least nicer, on Cali 91 .
And this I don't get. Subaru basically does everything based on "California" emissions. Why wouldn't they just tune the car to 91? Now, please excuse my ignorance to fuel and Octanes/AKIs and the such. This is a basic question. But, over the years, hearing this complaint, just seems interesting they didn't do that. Is it really THAT much a difference that they "have" to tune to 93?
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Old 04-12-2018, 02:36 PM   #16
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Quote:
Originally Posted by neg_matnik View Post
When it comes to the turbo EJ25, any power figure needs to be discussed in relation to octane level in the fuel.
Owners of the "RA" EJ257 will only get more power under the curve with 93 AKI gas in the tank; us here in Cali won't see **** as far as extra power below 4K.
That is unless we get the engine carefully remapped for our fuel; which is something no owner should have or should need to do in a brand new $40K+ car.
Now, if I were to buy a used STI, sure I'd play the game; but, a brand new STI? Heck no.
Instead, give me Golf R, plays nice on Cali 91, give me CTR, plays nice on Cali 91, give me a FoRS, plays nice on Cali 91.
In fact, give me virtually any new car without an EJ25 turbo under the hood and I guarantee it plays nice or, at least nicer, on Cali 91 .
Agreed, well documented. But you are listing vehicles from competitors with newer and more capability ecuís. And engines that were not designed in the 90ís.
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Old 04-12-2018, 02:48 PM   #17
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Quote:
Originally Posted by JustyWRC View Post
[...]And this I don't get. Subaru basically does everything based on "California" emissions. Why wouldn't they just tune the car to 91? Now, please excuse my ignorance to fuel and Octanes/AKIs and the such. This is a basic question. But, over the years, hearing this complaint, just seems interesting they didn't do that. Is it really THAT much a difference that they "have" to tune to 93?
Let's keep it simple; on the stock EPA/CARB tune, I estimate the power loss of running Cali 91 instead of 93 AKI gas from anywhere else, to be somewhere between 20 to 30 whp, all other conditions being the same (same temps, same elevation).
That's how bad it is; that's what happens with a turbocharged, port fuel injected, short stroker.
Even after tuning/remapping for Cali 91, the gap narrows a little bit, but it's still not as good as running 93 AKI.
I can tell you that it's very obvious, even with my own WRX Wagon, when I run around half a tank of 100 AKI gas mixed in with Cali 91.
The power delivery is so much crisper, it's really .
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Old 04-12-2018, 03:00 PM   #18
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Quote:
Originally Posted by Pre View Post
Agreed, well documented. But you are listing vehicles from competitors with newer and more capability ecuís. And engines that were not designed in the 90ís.
Yes, it's true. I kind of did it on purpose .
But, I remember the Volvo S40 with a turbo I5, that had been around for a long while, and was still around when I purchased my 06 WRX Wagon.
That Volvo turbo I5 is/was running SO MUCH better than even the EJ255 in my WRX; and, while Volvo was recommending premium fuel, that engine ran without a single hiccup on 87 AKI Cali gas.
It's also an engine from the 90s, but being an inline engine, Volvo could get away with a long stroke, long rods and a tall engine deck.
To this day, it's one of the smoothest and beefiest port fuel injected turbo engine I know.
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Old 04-13-2018, 12:07 AM   #19
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LOL - you all must not live in CO. Every. And I mean every STi and WRX are modded up here.
Shoot my last last 3 turbo cars were well modded / tuned while still in temp tags.
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Old 04-13-2018, 12:46 AM   #20
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Yes, it's true. I kind of did it on purpose .
But, I remember the Volvo S40 with a turbo I5, that had been around for a long while, and was still around when I purchased my 06 WRX Wagon.
That Volvo turbo I5 is/was running SO MUCH better than even the EJ255 in my WRX; and, while Volvo was recommending premium fuel, that engine ran without a single hiccup on 87 AKI Cali gas.
It's also an engine from the 90s, but being an inline engine, Volvo could get away with a long stroke, long rods and a tall engine deck.
To this day, it's one of the smoothest and beefiest port fuel injected turbo engine I know.
I filled up Tuesday night. 93 octane, $2.69 a gallon
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Old 04-13-2018, 02:03 PM   #21
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I kind of want to trade in my 17 WRX for this 19 STI.
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Old 04-13-2018, 02:59 PM   #22
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Originally Posted by Brahmzy View Post
LOL - you all must not live in CO. Every. And I mean every STi and WRX are modded up here.
Shoot my last last 3 turbo cars were well modded / tuned while still in temp tags.
Same here; even if we're at sea level.
But, then again, if I have to spend $40K today, I don't want to have to remap my car.
Remapping for extra power, for fun, is OK when it's optional and not strictly necessary.
But, I strongly feel like every single STI with an EJ25 turbo must be re-tuned to run properly and safely on Cali 91. Same with 09+ WRX with VF52s.

Quote:
Originally Posted by Pre View Post
I filled up Tuesday night. 93 octane, $2.69 a gallon
Nice; I probably paid something like $3.70 for 91 last week. It's probably surely higher now; I haven't checked yet.
That being said, I don't drive much during weekdays; barely 12 miles a day.
In any case, I'm very much looking forward to Subaru's next move regarding engines and such.
My main evaluation criterion will be: does it run properly on weird-ass Cali 91 ?
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Old 04-13-2018, 06:26 PM   #23
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Nice; I probably paid something like $3.70 for 91 last week. It's probably surely higher now; I haven't checked yet.
That being said, I don't drive much during weekdays; barely 12 miles a day.
In any case, I'm very much looking forward to Subaru's next move regarding engines and such.
My main evaluation criterion will be: does it run properly on weird-ass Cali 91 ?
My boy (friend) is on Kihei and just paid $3.16 for 87.

In Kali/Commiefornia I'd rock NA and forget FI. Would make everything easier for you.
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Old 04-13-2018, 08:45 PM   #24
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My boy (friend) is on Kihei and just paid $3.16 for 87.

In Kali/Commiefornia I'd rock NA and forget FI. Would make everything easier for you.
That is so confusing to read. Is he your boy i.e. your friend. Is he a boy who is also your friend. Is he your significant other? Have you not defined the relationship?

I am SO CONFUSED

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Old 04-13-2018, 08:59 PM   #25
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That is so confusing to read. Is he your boy i.e. your friend. Is he a boy who is also your friend. Is he your significant other? Have you not defined the relationship?

I am SO CONFUSED

Somebody got put in the friend-zone.
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