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04-17-2020, 02:26 AM | #451 |
Scooby Newbie
Member#: 513819
Join Date: Apr 2020
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Strongly considering picking up this kit and have one question:
I am running a rotated Precision 6062. Because this turbo is oil-cooled and the cylinder 3 port is plugged now, would cylinder 3 now theoretically be running at a higher temp just like cylinder 4? This is where my ignorance shines through. I lack the knowledge on how the coolant loop now functions when cylinder 3 is plugged due to an oil-cooled turbo. If this area is now at a reduced flow like cylinder 4, I am wondering what the fix would be for cylinder 3. Appreciate any help on this and apologies for my lack of knowledge on this particular subject.
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04-17-2020, 02:48 AM | #452 |
Scooby Newbie
Member#: 489993
Join Date: Aug 2018
Chapter/Region:
NWIC
Location: PNW
Vehicle:2019 WRX STI LTD Pure Red |
Like Car_freak85 said earlier, MMA only covers direct replacement parts. So unless it is a direct replacement, they don’t have to. In this situation, regardless how great the part is, you are adding an aftermarket part and altering what is the original design of the engine. Which is why I am wondering if anyone happens to know of any conversation off the record.
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04-17-2020, 06:48 AM | #453 | |
Scooby Guru
Member#: 108051
Join Date: Feb 2006
Chapter/Region:
AKIC
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Quote:
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04-17-2020, 03:14 PM | #454 | |
Scooby Specialist
Member#: 13530
Join Date: Dec 2001
Chapter/Region:
NWIC
Location: Cascadia
Vehicle:EA63 , EA81T, EJ20G, EJ205 |
Quote:
Partly on the dealer's reporting to the mothership, but the final say lies with the OEM. On a piddling warranty request like a wheel bearing, yeah, probably not a big deal and it'll get pencil whipped. But this cooling mod doesn't mount to a low-buck assembly like the spindle. Anything funny about a dusted engine under warranty is going to draw the Eye of Sauron before the mothership cuts a check to the dealership for the warranty repair. |
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04-17-2020, 04:15 PM | #455 |
NASIOC Vendor
Member#: 198281
Join Date: Dec 2008
Chapter/Region:
MAIC
Location: Virginia
Vehicle:2005 WRX/STi WRB of course |
Not how I remember it, but in all honesty I haven't reviewed that document in probably over 10 years. Sounds like I need to review.
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04-17-2020, 04:27 PM | #456 |
Scooby Specialist
Member#: 13530
Join Date: Dec 2001
Chapter/Region:
NWIC
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Basically you can use whatever brand of air filter you prefer, any oil that is the correct grade, silicone wiper blades, etc. <-- It would be on them to prove a like-for-like part caused the failure.
What you can't do is install a Spoolinator turbo kit under warranty and expect Subaru to cover your ring lands. <--Not hard to prove you intentionally modified the warranted assembly with the intent to alter it from its intended design/purpose/whathaveyou, regardless if the part/modification actually caused the failure. Maintenance is protected under the MMA, hotrodding is not. |
04-17-2020, 05:23 PM | #457 | |
Scooby Guru
Member#: 108051
Join Date: Feb 2006
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04-17-2020, 08:07 PM | #458 |
Scooby Newbie
Member#: 489993
Join Date: Aug 2018
Chapter/Region:
NWIC
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Vehicle:2019 WRX STI LTD Pure Red |
If we are talking about a $200 repair, maybe not. If we are talking about a >$2,000 repair bill, you can almost certainly bet that they will.
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04-17-2020, 11:37 PM | #459 |
Scooby Guru
Member#: 108051
Join Date: Feb 2006
Chapter/Region:
AKIC
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Vehicle:2005 WRX STi WRB |
Idk I bought my car from dealer and it's never been back **** them they're crooks. Even if they do a warranty job on a full engine rebuild they will most likely do a **** job granted it depends on the tech and how he takes pride in his work. But it'll also come down to what the dealers willing to replace. If it's worn out but in spec you better believe they will use it. Me on the other hand no. If I can afford it it's getting replaced if not cars sitting while I daily my nice comfy ua6 Acura lol and I'll still walk all over a wrx on the highway with that to boot!
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05-19-2020, 10:07 PM | #460 | |
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Chapter/Region:
RMIC
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Quote:
I’d be really curious about this as well. |
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06-19-2020, 06:17 AM | #461 |
Scooby Newbie
Member#: 508752
Join Date: Nov 2019
Vehicle:2004 Forester STI JDM - WR blue |
Bearing in mind the block isn't completely symmetrical, but broadly speaking yes - you're correct - it would make sense to add an outlet to the back side of each block, in order to ensure similar coolant flow past each of the rear cylinders.
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07-03-2020, 04:00 AM | #462 |
Scooby Newbie
Member#: 504281
Join Date: Jul 2019
Location: Seattle, WA
Vehicle:2005 Impreza WRX STI Silver |
I was taking a look at the cooling diagram:
https://i.imgur.com/sCbV9gA.jpg With our without this mod, it looks like coolant flow on the LHS never gets routed through the radiator, so the hot coolant coming from the LHS is cooled down by the cooler coolant coming from the radiator. So if the mod adds the new flow path indicated by the green path, you're effectively lowering the temperature of (14) LHS Cylinder Head over cylinder #4 by not allowing all the hot coolant that passed through cylinder #2 to pass through the LHS head over cylinder #4. This looks like it mimics what the turbo line does for the RHS, except the redirected coolant doesn't flow through the radiator. The EGT balancing out post-mod seem to make sense. Cylinder 4 still should have the hottest EGT since some coolant flow from Cylinder 2 passes through the Cylinder 4 channel. Without the mod, I don't know how much the coolant cools down on the LHS after leaving the LHS head and before reaching the water pump again. With the mod, the coolant would have less time to cool down since it gets redirected to the water pump faster, making the coolant temperature at the water pump higher as well, which also explains the higher EGT for Cylinder's 1,2,3. Although, given this line of thought, I would expect Cylinder 3's EGT to be higher than Cylinder 1 (assuming all other factors held equal). Perhaps "increasing coolant flow" isn't the most accurate description? The net effect seems desirable! I'm wondering what people's experience with this mod has been long-term as it sounds interesting! |
07-03-2020, 08:39 AM | #463 |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
I've been in another thread discussing this topic as well. I just bought the Vems kit and am toying with the idea of modifying it to flow into the upper res via the coolant outlet from the turbo.
Based on the above diagram, it does appear this may produce the best results since it will go directly to the radiator. However, will it be too much coolant for those small diameter lines? It does appear to be the same path Subaru used for the TT Legacy's. |
07-04-2020, 01:34 PM | #464 | ||
Scooby Specialist
Member#: 346388
Join Date: Feb 2013
Chapter/Region:
MAIC
Location: PA
Vehicle:2001 Ej205 Impreza L SRP |
DOHC EJ Cylinder 4 Combustion Chamber Cooling kit
Quote:
The left side, 2&4, has worse coolant flow than the right side, 1&3. That’s why this exists. Go to post #19. The right side doesn’t really need this. The main thing is you’re getting heat OUT of cylinder 4 and more coolant flow around it. It doesn’t really matter that the hot coolant gets redirected back into water pump. The oil cooler, and most of the upper reservoir already flow back to the water pump. That’s a non-issue. Quote:
Not all of the upper reservoir flows through the radiator. Looking at hose size, most of it flows back into the water pump. There would probably be no difference between doing that, or just going into the heater core return. Last edited by RavensFan7; 07-04-2020 at 01:41 PM. |
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07-04-2020, 10:47 PM | #465 | |||
Scooby Specialist
Member#: 138994
Join Date: Jan 2007
Location: apparently I "spread the hate"
Vehicle:2006 WRX, 6MT, 5x114 |
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Quote:
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Is it just me...the topic of this coolant mod is most like reality show entertainment. Just plain silly. |
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07-04-2020, 11:04 PM | #466 | |
Scooby Specialist
Member#: 298403
Join Date: Oct 2011
Chapter/Region:
W. Canada
Vehicle:2008 WRX Premium Spark Silver |
Quote:
"Just saying." |
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07-04-2020, 11:35 PM | #467 | |
Scooby Specialist
Member#: 138994
Join Date: Jan 2007
Location: apparently I "spread the hate"
Vehicle:2006 WRX, 6MT, 5x114 |
Quote:
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07-05-2020, 12:40 AM | #468 | |
Scooby Specialist
Member#: 298403
Join Date: Oct 2011
Chapter/Region:
W. Canada
Vehicle:2008 WRX Premium Spark Silver |
Quote:
Why did you even bring it up as a concern in the first place??? |
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07-05-2020, 06:10 PM | #469 | |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
Quote:
Definitely not thinking outside the box since it was OEM for a specific model anyway. But without having OEM pipe/hose diameters available, I just want to make sure I'm not trying to force too much fluid through a bottle necked area. |
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07-06-2020, 10:49 AM | #470 | |
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Quote:
If I get first pick of reality show character, I'll pick Scott with the best looking 'ex' |
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07-06-2020, 12:09 PM | #471 | |
Scooby Specialist
Member#: 346388
Join Date: Feb 2013
Chapter/Region:
MAIC
Location: PA
Vehicle:2001 Ej205 Impreza L SRP |
Quote:
Again, most of that upper reservoir will NOT flow through the radiator. It will go right back to the water pump. Same as the cyl4 kit that uses the heater core return. It’s pointless to do it the way you’re thinking of. |
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07-06-2020, 12:14 PM | #472 |
Scooby Specialist
Member#: 346388
Join Date: Feb 2013
Chapter/Region:
MAIC
Location: PA
Vehicle:2001 Ej205 Impreza L SRP |
DOHC EJ Cylinder 4 Combustion Chamber Cooling kit
I’d like to preface this by saying I don’t have any of the kits, and don’t really plan to buy one anytime soon. That being said, either buy Dom’s kit and install the way he intended, or don’t do anything at all. He made and tested it this way for very specific reasons. Read posts #16 and #19 from him, or the watch the videos. People in this thread are way overthinking it, and trying to change things they don’t understand.
Doing it any other way....larger ID fitting, different flow path, etc....will change things. Are there other ways to do it that could work? Sure...but unless you plan on testing with individial EGT sensors and various coolant probes, you’ll never actually know how things are effected. Last edited by RavensFan7; 07-06-2020 at 09:21 PM. |
07-06-2020, 05:33 PM | #473 |
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Location: Northern Indiana
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I know Dom would have a field day with the way this thread went.
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07-07-2020, 02:24 PM | #474 | ||
Scooby Specialist
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Quote:
Quote:
I've skipped a few posts, so idk if there was someone thinking it was better to route directly/only to the radiator but that's less than ideal as that offers no flow until the thermostat starts opening. Even then, the flow from the rad would be variable as the thermostat is increasing and reducing flow the hotter and cooler the coolant temps become. Conversely, routing the mod to a water pump return offers flow the second the car is started. Once the car warms up, coolant from the radiator is flowing through the water pump mixing with the coolant lines that directly feed the water pump, but again that's variable. Routing to the turbo tank would likely allow a reduced amount of hot coolant directly feedind the water pump (whick pumps right back into the engine) which would arguably allow for more efficient cooling. Best of both worlds considering the coolant from the TT setup would likely have been heated further when flowing through the turbo. To further support this, why did Subaru run their single turbo return to the upper turbo tank (which has a path to the rad) and not to a line that only leads back to the water pump? Dom may have been knowledgeable to a level to use this information and accurately show positive and highly favorable results. I'll give him that credit at the very least. But until he lands a job at Subaru, in my opinion, his kit is only good enough, which may be satisfactory for 70% of people out there. The idea of routing to the turbo coolant tank was brought up for a few reasons, iirc. 1) that was the factory routing for the TT setup, 2) there was some concern over heater core performance in colder climates, and 3) some worked on the assumption that Subaru engineers are better at their designs than Dom is (what an absurd notion, right? ). Add those reasons together and some figured there's a reason why Subaru added 2-3 feet of extra coolant line that T'ed in to he right side turbo coolant return and not either of the heater core lines. But then again, I don't have EGT sensors to pair with my laser thermometer and other various sensors, so I guess I'm not able to understand or think as critically as Dom. |
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07-08-2020, 09:46 AM | #475 | |
Scooby Specialist
Member#: 346388
Join Date: Feb 2013
Chapter/Region:
MAIC
Location: PA
Vehicle:2001 Ej205 Impreza L SRP |
DOHC EJ Cylinder 4 Combustion Chamber Cooling kit
Quote:
The amount that would actually make it through the radiator would be so small, I can’t see it making any difference over the normal routing into the heater core return. |
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