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Old 02-13-2018, 05:37 PM   #1401
Fierysun
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Quote:
Originally Posted by heavyD View Post
Never mind the hundreds/thousands of engines that have been replaced on Subaru's dime since 2008.
Subaru is notorious for having questionable oem map/tunes (detonation) which resulted in these and other issues. Which is resolvable with a solid aftermarket tune, but really should be done right at the factory. Stronger pistons only makes it's it more tolerate of detonation.
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Old 02-13-2018, 08:18 PM   #1402
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Quote:
Originally Posted by Barry View Post
Guy I know was just told his car is on March allocation and is due for April delivery
Interesting.. I was advise that they will be all arrived in Canada by the end of March... nothing about delivery yet...
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Old 02-13-2018, 10:11 PM   #1403
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Originally Posted by Fierysun View Post
There's a misconception the stock pistons are "weak".
They break on the stock tune. While they may not be "weak" on a proper tune, they simply aren't strong enough. This is not a misconception. Do you see how many people break ringlands?
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Old 02-13-2018, 10:44 PM   #1404
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Originally Posted by SoapBox View Post
They break on the stock tune. While they may not be "weak" on a proper tune, they simply aren't strong enough. This is not a misconception. Do you see how many people break ringlands?
The problem is the factory tune. If the engine is experiencing detonation, it'll destroy not just the pistons (forged also), but the rings as well. With that being said, I personally wouldn't run a Subaru hard on a factory tune and I only go to a tuner I trust.
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Old 02-14-2018, 12:13 AM   #1405
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Quote:
Originally Posted by Fierysun View Post
Subaru is notorious for having questionable oem map/tunes (detonation) which resulted in these and other issues. Which is resolvable with a solid aftermarket tune, but really should be done right at the factory. Stronger pistons only makes it's it more tolerate of detonation.
Right, because some “dude” from a shop is far more knowledgeable about how to tune the engine safely, than the engineers at Subaru. It couldn’t possibly be due to people make modifications to their cars...
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Old 02-14-2018, 12:36 AM   #1406
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Quote:
Originally Posted by heavyD View Post
Never mind the hundreds/thousands of engines that have been replaced on Subaru's dime since 2008.
A lot of good will in there.....

Quote:
Originally Posted by Barry View Post
Guy I know was just told his car is on March allocation and is due for April delivery
Yep. Been like this for a while.
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Old 02-14-2018, 08:31 AM   #1407
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Originally Posted by thenoodler View Post
Right, because some “dude” from a shop is far more knowledgeable about how to tune the engine safely, than the engineers at Subaru. It couldn’t possibly be due to people make modifications to their cars...
It's not that simple...

Of course Subaru knows how to tune an engine safely. The problem is, modern emissions standards.

In order to get the aging EJ past ever-tightening emissions standards, it's well-known that Subaru has been forced into tunes I'm sure they'd prefer not to use. Started back in 2005 with the OL/CL fueling delays, and has continued since. The tune was lean enough, and the newer pistons weak enough, that in 2011ish they started having problems breaking pistons on stock motors, which they didn't use to do with regularity.

It's really hard to avoid knock on an over-square, port injection engine while meeting today's emissions regs.

A tuner, however, has no such regulations to meet. They can let the motor go open-loop much sooner, they can richen the motor up all over the place without any emissions worries. They have MUCH more flexibility with their tunes to keep knock at bay.

Now granted, of course increasing power lowers reliability too. And I'm not one to say a typical stage 2 tune is "safer" than the stock tune as many do. But I would say that a tuner can probably do some minor things to the stock maps, leaving boost and timing alone, in order to make the motor less detonation prone.

Last edited by SoapBox; 02-14-2018 at 08:50 AM.
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Old 02-14-2018, 08:45 AM   #1408
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This isn't a bad read which explains some of the potential causes of issues, including the tune, newer piston designs, driver factors, etc. A main theme is that the EPA is more to blame for ringland failures than Subaru is.

https://www.igotasti.com/vBforum/thr...our-WRX-or-STI
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Old 02-14-2018, 01:11 PM   #1409
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Quote:
Originally Posted by JustyWRC View Post
Yep. Been like this for a while.
I've been told April as well. Are they pretty much all being delivered in April?
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Old 02-14-2018, 01:47 PM   #1410
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Quote:
Originally Posted by Julia View Post
I've been told April as well. Are they pretty much all being delivered in April?
I'm sure a few will trickle to the high volume dealers a little earlier than others; but, yes. That's what I think.
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Old 02-18-2018, 09:52 PM   #1411
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Any word on the pistons alloy or part numbers, can you buy a short block with this new pistons?
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Old 02-19-2018, 10:57 AM   #1412
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Default Just got confirmation from my dealer on their allocation

Quote:
Originally Posted by JustyWRC View Post
I'm sure a few will trickle to the high volume dealers a little earlier than others; but, yes. That's what I think.
my dealer is getting 3 of them, one of each color. i've been first on the list with a deposit to buy at MSRP for well over 6 months. He gave me choice of color and I picked the black one.

i have a 3/36 lease on my 2017 limited (started Feb '17) and I know i'm going to get crushed on the early turn-in. it has less than 4k miles. my current monthly lease thru Subaru/Chase is $467. Does Subaru do lease transfers if I can find someone who wants it?
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Old 02-19-2018, 04:12 PM   #1413
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Quote:
Originally Posted by JRF View Post
my dealer is getting 3 of them, one of each color. i've been first on the list with a deposit to buy at MSRP for well over 6 months. He gave me choice of color and I picked the black one.

i have a 3/36 lease on my 2017 limited (started Feb '17) and I know i'm going to get crushed on the early turn-in. it has less than 4k miles. my current monthly lease thru Subaru/Chase is $467. Does Subaru do lease transfers if I can find someone who wants it?
chase owns the car, as long as they get the current buy out they dont care about the rest. log in and see what the buyout is, see if the dealer will buy it from chase or how close they will get. ive never turned a lease in, ive always traded them in or sold them.
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Old 02-19-2018, 05:21 PM   #1414
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Quote:
Originally Posted by Barry View Post
Guy I know was just told his car is on March allocation and is due for April delivery
Yes. I have been told April delivery by my dealer since December 2017.
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Old 02-19-2018, 08:41 PM   #1415
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Quote:
Originally Posted by 2toxic View Post
Any word on the pistons alloy or part numbers, can you buy a short block with this new pistons?

According to Subaru, the entire short block assembly of the type RA is no different than past STi's :

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Old 02-19-2018, 08:42 PM   #1416
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Originally Posted by Shik View Post
According to Subaru, the entire short block assembly of the type RA is no different than past STi's :

I think what Subaru meant is that the Type RA short block will fit all those models.
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Old 02-19-2018, 09:16 PM   #1417
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Quote:
Originally Posted by Fierysun View Post
I think what Subaru meant is that the Type RA short block will fit all those models.
I don't think so.

A short block assembly for a 2011 STi is the same number.

Look at the piston numbers.


Piston for a 2011 STi: 12006AC390(standard Grade A)
12006AC400(Standard Grade B)

Piston for a 2018 STi Type RA: 12006AC390 (Standard Grade A)
12006AC400 (standard Grade B)

And FWIW, when looking at the struts, the struts listed for the Type RA show that they ONLY fit the Type RA. Yet the front springs for the Type RA are the same for all 2016 + WRX and STi's including the RA.

Interesting, but I doubt anyone actually buying a Type RA really cares
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Old 02-19-2018, 11:35 PM   #1418
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So the pistons are the same, even though they say stronger pistons, same short block as previous years
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Old 02-20-2018, 01:03 AM   #1419
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Somethin ain't right here.....
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Old 02-20-2018, 01:31 AM   #1420
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I would of thought there would be new part number for the pistons, and are the forged or not
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Old 02-20-2018, 03:27 AM   #1421
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From page 45 of this thread...

Quote:
Originally Posted by carnz-pj-410 View Post
I know someone in here asked about confirming shortblock and piston part numbers for the RA. I went thru the all the sections of the catalog and heres all the differences I could spot for the 2018 WRX STi vs 2018 WRX STi Type RA

Code:
2018 WRX STi Type RA parts differences vs 2018 WRX STi

**Engine Section**

Engine Assembly
RA - 10100CD380  (EJ257XG6LB)
STi - 10100CD390 (EJ257AG6LB)

Shortblock Assembly
RA - 10103AD020
STi - 10103AC890

Gasket & Seal Kit
RA - 10105AB880
STi - 10105AB200

RH Head & Valve Assembly
RA - 11018AA910
STi - 11018AA500

LH Head & Valve Assembly
RA - 11019AA950
STi - 11019AA500

Cylinder Block Set
RA - 11008AB360
STi - 11008AA950

RH Bare Cylinder Head
RA - 11039AC730
STi - 11039AC320

LH Bare Cylinder Head
RA - 11063AC010
STi - 11063AB480

Head Gasket
RA - 11044AA910
STi - 11044AA770

Piston (STD Size Grade A)
RA - 12006AE550
STi - 12006AC390

Piston (STD Size Grade B)
RA - 12006AE560
STi - 12006AC400

Piston (O.S. 0.25mm)
RA - 12006AE570
STi - 12006AC410

Piston (O.S. 0.50mm)
RA - 12006AE580
STi - 12006AC420

Piston Ring Set (STD Size)
RA - 12033AD440
STi - 12033AC000

Piston Ring Set (O.S. 0.25mm)
RA - 12033AD450
STi - 12033AC010

Piston Ring Set (O.S. 0.50mm)
RA - 12033AD460
STi - 12033AC020

Exhaust Valves
RA - 13202AA412
STi - 13202AA660

Air Filter Element
RA - 16546AA180
STi - 16546AA120

Air Intake Duct
RA - 46012VA020
STi - 46012AG001

Case Complete Air Cleaner Upper
RA - 46052VA030
STi - 46052AG080

Case Complete Air Cleaner Lower
RA - 46052VA020
STi - 46052AG090

Spark Plug
RA - 22401AA910 (ILFR7H)
STi - 22401AA670 (SILFR6A)

ECM (ECU)
RA - 22765AM270
STi - 22765AK920

**Transmission/Driveline**

Transmission Assembly
RA - 32000AK560 (TY856UW6AB)
STi - 32000AK510 (TY856UW6AA)

3rd Drive Gear
RA - 32275AA630
STi - 32275AA560

Gear 3rd & 4th Driven
RA - 32254AA690
STi - 32254AA600

**Suspension/Brakes**

Front Right Strut
RA - 20310VA102
STi - 20310VA400

Front Left Strut
RA - 20310VA112
STi - 20310VA410

Rear Struts
RA - 20365VA060
STi - 20365VA400

Coil Spring, Rear
RA - 20380VA060
STi - 20380VA020

Front Right Caliper
RA - 26292VA020
STi - 26292VA000

Front Left Caliper
RA - 26292VA030
STi - 26292VA010

Rear Right Caliper
RA - 26692VA040
STi - 26692VA020

Rear Left Caliper
RA - 26692VA050
STi - 26692VA030

Wheel
RA - 28111VA230
STi - 28111VA270 and 28111VA180

Center Cap
RA - 28821VA030
STi - 28821FE141

**Steering System/Cable/SRS**

Steering Wheel
RA - 34312VA130
STi - 34312VA022VH and 34312VA160VH

Steering Gear Box Assembly (Steering Rack)
RA - 34110VA140
STi - 34110VA131

Clamp- Gear Box Pinion
RA - 34166VA030
STi - 34166AG030

**Exhaust**

Gasket A
RA - 44011SG000
STi - 44011SG010

Exhaust Pipe Assembly Rear
RA - 44200VA110
STi - 44200VA020

Muffler Assembly - Right
RA - 44300VA210
STi - 44300VA030

Muffler Assembly - Left
RA - 44300VA200
STi - 44300VA020

**Body**

Rail Complete - Roof Front
RA - 53400VA0009P
STi - 53400FJ0329P or 53400FJ0019P

Rail Complete - Roof Rear
RA - 53410VA0109P
STi - 53410FJ0109P

Roof Panel
RA - X5350VA000
STi - 53600FJ0809P or 53600FJ0709P

Trunk Lid Complete
RA - 57509VA0809P
STi - 57509VA0309P or 57509VA0709P

Trunk Torsion Bar
RA - E7210VA110 (set)
STi - 57529VA021 and 57529VA031

Rear Bumper
RA - 57718VA010
STi - 57704VA022

**Electrical*

Bulkhead Wiring Harness
RA - 81402VA850 or 81402VA870
STi - 81402VA830 or 81402VA860

Instrument Panel Wiring Harness
RA - 81302VA940 or 81302VA960
STi - 81302VA930 or 81302VA840 or 81302VA870 or 81302VA880

Push Start Switch
RA - 83031VA000
STi - 83031FJ004

Antenna
RA - 86321VA330
STi - 86321VA320xx or 86321VA500xx

**Misc**

Front Grille
RA - 91121VA270
STi - 91121VA160

Molding Garnish Front Fender Right
RA - 91123VA300
STi - 91123VA000

Molding Garnish Front Fender Left
RA - 91123VA310
STi - 91123VA010

Label Emission Control
RA - 14808AJ190
STi - 14808AJ120

Label Tire Pressure
RA - 28181VA560
STi - 28181VA490 or 28181VA140 or 28181VA150 or 28181VA330

Front Ornament
RA - 93013VA320
STi - 93013VA280

Letter Mark Rear
RA - 93079VA220
STi - 93079VA040 and 93079VA240

Rear Spoiler
RA - E7210VA105
STi - 96061VA001xx or 96061VA010xx

The unique part numbers for the cylinder block casting and cyl head castings are interesting.

To my knowledge not all of these parts are in the ordering system yet,so i can't get pricing on the shortblock or pistons yet

EDIT: Full catalog differences coming soon

Updated: 9:24EST 01/08/2018 with all the differences i can spot in the EPC

Last edited by jl_9k; 02-20-2018 at 03:42 AM.
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Old 02-20-2018, 10:11 AM   #1422
Shik
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Quote:
Originally Posted by JustyWRC View Post
Somethin ain't right here.....
I just thought it was interesting that the TypeRA parts were already listed on parts.subaru.com and started looking around. I've always had super good luck with accuracy for parts(as one would think since it is Subaru's site).
Not saying there aren't inaccuracies or maybe all of the "true" type RA parts aren't listed on there yet since the car is not yet available? Who knows.

The TypeRA shortblock part number listed previously from the "catalog", part number 10103AD020, says on parts.subaru.com says "This Product is No Longer Available". So maybe the site just didn't get updated yet or something.

However, when looking at the exhaust on parts.subaru.com, which has been said that the TypeRA has a "free'er flowing exhaust" does indeed show a TypeRA specific part number for both the catback and the mufflers. So it would seem they got that one right.
Looking at the entire transmission assembly, again, parts.subaru.com shows a TypeRA ONLY part number for the TypeRA transmission which would obviously make sense as well since it is different.

Other "TypeRA specific" parts like the steering wheel, rear spoiler(almost $4000 ) are correct on the site, and other parts like the new "cold air intake" and carbon roof panel show they are TypeRA specific but not yet listed.
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Old 02-20-2018, 11:08 AM   #1423
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Good information they're shik,, I believe the part numbers will come out after the car comes out in April, I do believe there will be a new short block, but I think the rumor has it that the Pistons are cast, stronger in that they got more material and possibly the ring lands are lower down in the Piston to protect it from the combustion chamber so that will be good,, be nice to see some pictures of these new Pistons
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Old 02-20-2018, 11:56 AM   #1424
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The part numbers have been out for a while now, i posted them as soon as i saw the Subaru EPC was updated at work
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Old 02-20-2018, 12:20 PM   #1425
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Quote:
Originally Posted by carnz-pj-410 View Post
The part numbers have been out for a while now, i posted them as soon as i saw the Subaru EPC was updated at work
Yes, a lot(most) parts you posted do jive with the parts.subaru.com site, yet when it comes to pistons, rings, heads, etc, they come up with a red "ALERT" and state they are no longer available. I'd be curious to know why the engine stuff doesn't seem to coincide, yet everything else does.
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