FA20 oiling problems, study and solution

[pro_turbo]

Originally Posted by ETM_Shaman

Hi guys,

I finally got to do the oil pickup tests with the original 19mm (3/4") pickup Chris from Killer B sent me.

I did the tests on the same day, same oil, same process. I changed the outlet pressure port to the stock switch location because it seemed more consistent than on the crank passage.

Stock:


Killer B 19mm (3/4"):


Modified Killer B 22mm (1"):


And this is the results graph:


As you can see outlet pressures are close but inlet pressures not so much. Killer B's is good for most of the improvement and will probably have even higher inlet pressures when used in a stock engine with tight clearances.

I think Killer B's will be enough for 99% of the people and for those using loose clearances with more flow it's not that hard to cut the 3/4" pipe and weld a 1" pipe in the same location (much easier that what we had to do).

It's hard to know if it's worth it but any positive displacement pump will always perform better with a higher inlet pressure. That's why I would recommend to anyone to get the Killer B pickup which already does a lot in that regard.

Any well fabricated less restrictive (straight 3/4" at least) will work, please don't think I have any particular interest with Killer B, but they were the only ones that had what I was looking for (and top quality) and Chris was kind enough to send me one for testing.

My engine has about 50 hard laps in our local track and a lot of very spirited driving and sliding around, all with clean oil and filters afterwards so I feel confident it will endure whatever comes. Touch on wood

Do you still using stock oil pump on this test ?

[ETM_Shaman]

Yes, completely stock oil pump.

[ETM_Shaman]

Sorry for not updating in a long time!

The car has about 3,000 km of hard driving (10 track days) without engine problems. It has very good power and runs in the top group in our local track, doing similiar laptimes to stock Porsche GT3 cars. Of course I've done many other upgrades to achieve this, maybe I'll do a track oriented build thread!

Feel free to ask any questions.

[blsfrs]

Just out of curiosity, Where did you run your oil cooler lines?

[ETM_Shaman]

I'm using a JDL oil cooler with the lines crossing the front tucked along the rebar

[blsfrs]

Would you mind sharing some details of your engine? I'm especially interested in valve train mods to avoid rocker arm issues. Thanks.

[hachi roku [86]]

As this relates to oil issues; can this cover (pictured) with the oil pressure piston be purchased separately from the whole front engine/timing cover?



Apparently, this oil pressure piston got stuck, which caused an oil pressure issue, which in turn led to a spun rod bearing and an engine failure...



Any advice on how to avoid this happening again would be highly appreciated!

[FrickingReallySlow]

Originally Posted by hachi roku [86]

Apparently, this oil pressure piston got stuck, which caused an oil pressure issue, which in turn led to a spun rod bearing and an engine failure...

I believe there were a bunch a threads that talked about the PRV. Can't remember specifics but ppl talked about shimming it if you're never going to be in driving in cold/winter climate and only tracking your car. Try searching "PRV" or "oil relief valve"

Curious how did you determine it was the PRV? and what tests do you perform to test it being stuck open?

[JohnH]

ETM Shaman, thanks VERY much. This is excellent, and very high skill work. I am really grateful to see this kind of work. I used to be with another type of car and community, and this was the norm. I have not seen this kind of excellent work and dedication in a decade or so on normal public forums.

Again thank you!!

and its also very cool to see where you are from. Most of this kind of think is usually from the US, western Europe or Japan. Very interesting to see someone of your skill from Lima

[callisto]

Shaman, this was a terrific thread, all these years later; thanks for writing it up.

I thought you might be interested to know that the 2022 BRZ oil pickup tube is using the 15049 part line now (15049AA170) instead of the 15050 part line used previously in seemingly all BRZs (15050AA160), and it's listed as "for sale" on parts.subaru (though who knows if that's real yet).

While I can't find any pictures specifically of 15049AA170, looking at 15049AA150, it definitely looks more or less like a straight tube, compared to the 15050 line, and I see Subaru changed over the Forester line after 2018 (15050AA170) as well, with the only car left being the 2021 WRX (no listings yet for 2022).

I thought maybe this might count as validation of your research in some fashion, so duly noted

[demasrv]

The Killer B Motorsport website lists that the oil pickup fitment is for a 2015+ BRZ/FRS. Does anyone know why? I'm in the middle of rebuilding my 2013, purchased this pickup but I'm not sure what the differences would be. I don't remember seeing any major differences around the oil pan when I was looking at buying a newer engine for the 2013 instead of attempting a rebuild. I did reach out to them via their form on the site so I'll report back if/when they respond.

[NoHaveMSG]

Originally Posted by demasrv

The Killer B Motorsport website lists that the oil pickup fitment is for a 2015+ BRZ/FRS. Does anyone know why? I'm in the middle of rebuilding my 2013, purchased this pickup but I'm not sure what the differences would be. I don't remember seeing any major differences around the oil pan when I was looking at buying a newer engine for the 2013 instead of attempting a rebuild. I did reach out to them via their form on the site so I'll report back if/when they respond.

Because they are idiots. Fit is the same for all gen 1 cars if they build it correctly.

[Ultramaroon]

Originally Posted by NoHaveMSG

Because they are idiots. Fit is the same for all gen 1 cars if they build it correctly.

Quality control issues bleeding over into web content. Could only afford the One Sigma model.

[timurrrr]

BUT THE 2022 BRZ HAS AN ASCENT ENGINE AND 13.5:1 COMPRESSION RATIO!!!11