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Old 02-21-2019, 10:09 AM   #401
Turpid Porpoise
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Quote:
Originally Posted by 2slofouru View Post
That would make sense only if the foofoo version remained in its original form, modding it to match the ID of the dom kit will obviously yield the same result.
Agreed.

Quote:
Originally Posted by 2slofouru View Post
Of course comparing before and after with without the mod could yield more information if several more data points are monitored. That could be helpful to people who want to know if the kit in general will do what they want.
That's why we're all here, right?

Obvious data we are looking for:
Each kits influence on the HVAC system.
Each kits influence on cylinder head temps.
Each kits influence on cylinder 4 EGTs.
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Old 02-21-2019, 07:44 PM   #402
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Quote:
Originally Posted by Turpid Porpoise View Post
Agreed.



That's why we're all here, right?

Obvious data we are looking for:
Each kits influence on the HVAC system.
Each kits influence on cylinder head temps.
Each kits influence on cylinder 4 EGTs.

Some new Hondas have an interesting feature we techs can access (well maybe anyone can with the proper $$$ scanner). It's a cylinder air/fuel imbalance test and it detects an individual cylinder running leaner or richer than the others. It does this by leaning cylinders one at a time in several increments, to the point of almost missing. Then it judges and gives test results. If HONDA can do this, technically they (and other manufacturers) could actually tune the engine per cylinder to get pretty precise balanced air/fuel mixtures. They have half the equation figured out for sure, but I'm not sure whether an "auto" tuning feature that detailed is already in the software. Will ask next trip to training though. Surely other techs are wondering. This would make it way easier to keep cylinders even and mpg and power output would definitely improve.

So yeah, if Honda can do it, then so could Subaru or even aftermarket ecu companies. Haltech, where you at????

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Old 02-21-2019, 07:46 PM   #403
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Quote:
Originally Posted by 2slofouru View Post
Some new Hondas have an interesting feature we techs can access (well maybe anyone can with the proper $$$ scanner). It's a cylinder air/fuel imbalance test and it detects an individual cylinder running leaner or richer than the others. It does this by leaning cylinders one at a time in several increments, to the point of almost missing. Then it judges and gives test results. If HONDA can do this, technically they (and other manufacturers) could actually tune the engine per cylinder to get pretty precise balanced air/fuel mixtures. They have half the equation figured out for sure, but I'm not sure whether an "auto" tuning feature that detailed is already in the software. Will ask next trip to training though. Surely other techs are wondering. This would make it way easier to keep cylinders even and mpg and power output would definitely improve.

So yeah, if Honda can do it, then so could Subaru or even aftermarket ecu companies. Haltech, where you at????

That..... Is very cool.!
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Old 02-21-2019, 07:51 PM   #404
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Exactly what I thought!! Like, why haven't they integrated this idea as an auto tune feature already??? (Unless they top secret already do, and won't tell anyone)

Just messaged the folks at Haltech. Probably won't get a reply, but who knows. Worth a try.

Last edited by 2slofouru; 02-21-2019 at 08:03 PM.
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Old 02-22-2019, 03:05 PM   #405
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I spoke to a shop and I was told "Dom's kit works too good. You will loose heat at a red light" Not sure how true that is as I do not have the kit yet.
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Old 02-22-2019, 03:13 PM   #406
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I spoke to a shop and I was told "Dom's kit works too good. You will loose heat at a red light" Not sure how true that is as I do not have the kit yet.
That indicates air in the system. There a couple solutions to get the last bit of air out.

I used my lisle funnel and combined a bit of info from the FSM. With the heat on high, fan on low, I very slowly reved up to 3k rpms and back (to idle). Before I stopped the bleeding process I made sure the heater worked on max temp, and hi/low fan settings at idle.

My heat is very hot in all situations.
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Old 03-07-2019, 02:06 AM   #407
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Bergs,

do you have any thoughts as to what experiments from what was discussed above you might be able to run with your equipment and rough timing.

Not trying to rush or be inconsiderate but just would like to know what might be done to advance the case.
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Old 03-07-2019, 07:13 AM   #408
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No worries. Had a bit of travel last week and obviously didn't check in.

Test wise I agree with testing both kits, measuring HVAC and Cyl4 EGT. Curious if we are interested in Cyl2 EGT as well.

Also want to know where to attach thermocouples. My thoughts are to attach to each end of the head, one near the Cyl4 fitting and the other on the Cyl2 water jacket (in a similar location as the Cyl4 fitting).

Is there any interest in performing tests on Cyl1 and 3?

Timing wise, the car is nearly done. Figuring by the 15th it will be on the road then it's just a matter of getting through engine break-in.


Financially, I ask for help on anything beyond obtaining the kits. I am prepared to foot the bill for Dom's parts and DIY kit.

Also, Foo......I am looking for advisement on how to source the DIY fitting, etc.
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Old 03-07-2019, 09:07 PM   #409
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I'm tearing down a running 06 STi that's been showing signs of pushing coolant, and it's looking like it was cylinder 4 that did it based on the crap in the exhaust port and cleaner spark plug. Thought this could be another data point.

It's going back together with Dom's kit installed, I've got better things to do than to try to beat the price on a $90 part with hours of my labor.
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Old 03-08-2019, 12:44 AM   #410
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Quote:
Originally Posted by nucci View Post
I'm tearing down a running 06 STi that's been showing signs of pushing coolant, and it's looking like it was cylinder 4 that did it based on the crap in the exhaust port and cleaner spark plug. Thought this could be another data point.

It's going back together with Dom's kit installed, I've got better things to do than to try to beat the price on a $90 part with hours of my labor.
Lol.


I had the same issue, but upon disassembly, I think my HG failed in between the two chambers (2/4) and it would only let loose on higher pressure pulls, 2 gear mainly. I was lifting heads for quite some time before I started blowing steam out of the pipes though. I think I was lucky.

Good luck with your build.
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Old 03-08-2019, 03:20 PM   #411
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Also about to use this part after tear down over head gasket issue going to see if the current shortblock can be saved there was alot of coolant and lead in my UOA which i read months afterwards.

The oil looked like clean oil im still not ready to test my bad luck that the bearings are ok.
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Old 03-11-2019, 07:47 AM   #412
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Anyone has spare 21170AA020?
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Old 03-11-2019, 05:55 PM   #413
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Picked up the car today. Got some work to do on the driver's window then it's off to state safety inspection by the end of the week.

Once the car passes inspection, I will obtain the parts needed for testing then update again after break-in is complete.

I will be speaking with a colleague this week about the allowable temperature range for the test equipment. I believe it logs quite a bit of data and will plot a chart for each log.
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Old 03-13-2019, 11:04 AM   #414
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Originally Posted by MaximNYC View Post
Anyone has spare 21170AA020?
This guy may have a few left https://www.toronto-subaru-club.com/...91#post1699291

Or do what he did and contact http://jp-carparts.com/

maybe even japanparts.com can get them too
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Old 03-13-2019, 12:56 PM   #415
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Quote:
Originally Posted by Foo_Blyat View Post
This guy may have a few left https://www.toronto-subaru-club.com/...91#post1699291

Or do what he did and contact http://jp-carparts.com/

maybe even japanparts.com can get them too
I do!
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Old 04-01-2019, 04:50 PM   #416
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Chiming in to update and it's not all great news...

The engine has been broken in and all seems well however the car has a few issues that came up during break-in and I am working on sorting them out.

Will update again once things are sorted.
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Old 04-02-2019, 06:01 PM   #417
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-----

Last edited by lowbee; 04-16-2019 at 01:58 AM. Reason: deleted - found my answer
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Old 04-16-2019, 02:16 AM   #418
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Would someone installed the DIY kit report how it is working ? Does your heater still provide as much heat to the cabin as before ? TIA
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Old 04-16-2019, 11:51 AM   #419
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I took HVAC temperature readings before and after installing Dom's kit using an infrared thermometer taking readings off the center vents. This was done with the engine at idle and the coolant between 185 and 190 after running the fans on high for 2 minutes. I did this 3 days in a row for both pre and post install. I found an 8 degree reduction on average which works to about 5%. More importantly I didn't "feel" any difference in the operation of the system.

I wouldn't call these numbers 100% accurate... There were still a few variable that could have affected the results.
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Old 04-16-2019, 03:06 PM   #420
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I didnt feel a difference i commute home at 5am when its around 40 degrees or lower bundled in UA thermal underwear i always need some type of heat going for my nose, nasal passage just leak 24/7 even worse in the cold air.

Cabin is usually toasty if i want it that way before i get home on my 20 minute drive home.

I did notice the coolant temp hovers around 181 more often normal would be 188-191 in my 11 year old subaru.
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Old 04-16-2019, 03:52 PM   #421
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Quote:
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I didnt feel a difference i commute home at 5am when its around 40 degrees......
And you are using the straight up DIY (not DOM $80) kit without restrictor ?
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Old 04-17-2019, 02:07 AM   #422
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And you are using the straight up DIY (not DOM $80) kit without restrictor ?
Dom kit I didn't see all the diy talk til a day after I ordered from Dom.
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Old 05-08-2019, 08:24 PM   #423
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Your coolant is still pretty hot. This just allows more flow through the head. It shouldn't really effect the temperature a whole lot going into the heater core.
BTW, I made my own kit using AN fittings, silicone hose, aluminum t. I'm willing to bet it'll do the same difference as a dom or "OEM" kit. If I lose heat I'll simply throw on an OEM fitting.
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Old 05-10-2019, 04:58 PM   #424
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Just took it for a drive. Heat blows just as hot. I also did notice my temp tends to be just a tad, tad, tad, lower. Not much though. Not even noticeable unless you drive the car every day.
This was with AN fittings engine side, and the same type of T fitting in the kit.
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Old 05-28-2019, 11:43 AM   #425
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Following up with my earlier offer to perform some testing....

I am unable to participate in data collection for the foreseeable future as I have some personal things that came up. My apologies to the group for no following through on my offer.
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