GR86 Oil Pressure Drop Fix / Oil Pan Drop 27

[@artblackwood7936]

Re-shaped pan is definitely the best solution. Thanks for doing these videos. I watch every one of them.

[@CMAutohaus]

My personal ideal solution is a bigger, baffled oil pan. Accusump seems like a ridiculously HUGE investment for a casual track toy (hardware wise)

[@Hybris51129]

It's just amazing and embarrassing how much work the aftermarket community is having to do to fix a issue that should really have been caught at the prototype and pre-production level from Toyota or Subaru.

[@CMAutohaus]

100%

[@camryds]

appreciate the hard work and fighting the good fight on this.

[@CMAutohaus]

Fighting!

[@jumboshirmp]

CM Autohaus just a week ago installed a JR oil cooler and a 1/2 quart overfill. First oil change at 1000 miles and no RTV issues thus (checked via Borescope inspection). Put in 5W-30 for upcoming track days. Feels great on street thus far! Incredible mechanic Ezekiel is! 💪

[@kevind_53]

It's nice to see after one year the result. Thanks 🚗💥💨🔥

[@CMAutohaus]

More to come!

[@jaron95]

Awesome info. Thanks for keeping us updated!

[@CMAutohaus]

Appreciate your constant support!

[@jamsbong]

This FA engines have one inherently flaw design compared to the EJ. The FA has a parallel flow path oil circuit. This means that if one path has a more resistance, the oil will choose the other path. So even if you have an elaborate aftermarket kit to fix oil starvation, it might still kill the engine.

[@mattkosma3271]

Thanks for this info. I have 2K on my ‘23 GR86. No track yet. I’m waiting for the “fix”. This looks promising.

[@RexDog]

I have a mishimoto (i think) quick drain valve on mine - easy open close valve to drain some oil out after track day - also catch cans for the pcv -

[@CMAutohaus]

Catch cans are a good idea. Im not sure if the Fujimoto quick drain valve will allow any/all solid material to exit the oil pan - not a concern on a "normal" car, but a factor in an engine full of excess rtv

[@RexDog]

@@CMAutohaus that's a very good point I never considered! The outlet is about 1/4" -much smaller than the stock hole

[@warrenlucier5796]

You will need to do what it takes to install a deeper baffled truncated sump to have the quantity of oil and for control of it. If you remove the heat shields and then wrap the headers, how much room will you get doing that vs building headers that will give you the room? Take a look at the wet sump HP Academy built from the existing oil pan, and it has 2 drains to get the oil from the heads back to the oil pan. Running a high oil level or an Accusump comes with their own unique problems. All Subaru's have too much oil remaining in the heads, as EJ engines are known for it.

[@sethanderson204]

@CMAutohaus So to follow up from our discussion the other day on the AOS option. I spoke to someone (Derek?) at over the phone at @VerusEngineering about it. In theory, the AOS would keep oil out of the intake without negating the over-fill. The return tube would send the excess oil back to the sump. Now someone just needs to test this. I would but my GR86 got crushed by a semi driver that wasn’t paying attention while I was stopped at a stop sign :’(

[@CMAutohaus]

Yes big power RB26 Skylines have been doing this for ages - overfilling and running a return to sump AOS/catch can

[@Tothetower4]

It seems that the low mileage ones don’t have it and the higher mileage ones do, I wonder what’s a good mileage to check it at, is 8,000 miles too low to drop it?

[@AnytimePaintingCo]

Man i so wanted this car. Why god why 😱

[@CMAutohaus]

Its what makes a Subaru...a Subaru!

[@bigfreeze524]

I had a question since I know you know your stuff, my car doesn’t want to shift into second gear, everything else works great but it’s like something is preventing it to engage into second gear (just did a clutch job)

[@CMAutohaus]

Try adjusting the reverse lockout plate on the shifter

[@sethanderson204]

@CMAutohaus Would an air oil separator help keep oil out of the intake when using a 1L overfill, possibly on the street as well as the track?

[@CMAutohaus]

One idea that RB26's (Skylines) commonly use is a catch can system that returns to the sump as RB26s are notorious for pumping too much oil into the PCV system Catch can/air oil separator may fill up too quickly and negate the 1qt overfill, but someone needs to actually test this.

[@sethanderson204]

Cool, thanks. Looks like @VerusEngineering has an AOS that will return oil to the sump with an add-on. I would be curious to see that tested along with the overfill.

[@motorstock10]

While I'm not planning to do any racing, I like spirit driving, so Im considering buying a 2024 tS BRZ. In your opinion is it still a good buy considering the RTV and low pressure on the right corners issues?

[@CMAutohaus]

There is a better option comming in the next 2 months...

[@motorstock10]

@@CMAutohausthanks for your reply, you mean a car or a fix for the issues?

[@Cichlid_Visuals]

a budget fix is to overfill oil and run a cheap PCV catch can so you dont get any overfill oil in your intake. you have to empty it every track day of course (and refill your extra oil) each time, but hey, after a session you wont have to drain it out for street driving lol.

[@CMAutohaus]

A return to sump design would be ideal. Rb26 and 2zz guys do this due to extreme blow by.

[@Cichlid_Visuals]

it would for street purposes i think, but id like to keep all that from returning to the crankcase personally though, especially if its just for track days. dont want all those contaminates reducing film strength on those bearings in critical moments. id give it a fresh oil change after every track day anyways so no trouble in emptying the catch can at the same time. @@CMAutohaus

[@240sxdriver]

Do the GR86 Cup cars have a different oil pan? I’m curious how those aren’t seeing issues

[@CMAutohaus]

Yes they have a TRD baffled pan, similar to the SYMS baffle. The TRD baffle doesnt work and GR86 Cup cars have had mutiple engine blows already

[@shawnb50]

What if you drive crazy on the streets a lot and are really going back and forth between driving hard and normal. Like 1 hour you could be driving crazy and then not and this is like everyday you drive like this. Is that oil pan going to work? And then you fill half quarter over or more or less with that pan?

[@Julianklaus]

Do you notice engine heat coming inside the cabine? I notice it on my car when oil temp is around 214

[@amzmoney]

Until these are addressed I’m gonna be really sad because I want to purchase this car as a daily and canyon/track car. I had a 2013 BRZ in the past but I really want the updated car. Maybe I should go back to the old gen?

[@c2st403]

Tomei baffle also works?

[@CMAutohaus]

Tomei baffle acutally makes the starvation issue worse

[@Imprezalove]

Glad I chose the VB WRX over the BRZ. This has all gotten out of hand.

[@CMAutohaus]

And more to come!

[@sikrip]

Would an oil catch can help with the downsides of overfill?

[@CMAutohaus]

No

[@jagymeister]

Does Syms oil pan solves pressure drop?

[@CMAutohaus]

Along with 1qt oil overfill yes

[@jagymeister]

@@CMAutohaus but 1qt is not ideal outside track right? 0.5qt is not enough?

[@GP-fc7jv]

Oil air separator

[@isaacmagana7078]

Has there been any cases of a street gr86 or brz with a blown engine?

[@CMAutohaus]

Yes we have had at least 2 locals have engine failure on the mountain roads.

[@isaacmagana7078]

@CMAutohaus wow, that worrys me because I have a 22 brz. I believe it's a Novmeber or December model. Do you know how many miles the cars had?

[@Tonga2]

Well, I never heard of any non tracked cars with engine failures but it looks as if someone has said 2 did but I have heard the other numbers where 8 tracked cars. Now talking engine failures, I have heard one guy had his engine computer log an 8,000 rpm limit hit. Yes our computer does monitor how the engine is driven. Mine is street only driven and yes it gets revved but I have set my limit warning To 6800 rpms knowing that once I hear the warning I can get to 7,000 rpms before ny foot can depress the clutch to shift. The engine peaks HP at 7,000 rpms so why rev it higher, just shift gears. As far as oil pressure drop that will occur only in very tight turns let’s say like running the Dragon at high speed. Not many roads out there that can get you into that territory and I will not lose any sleep over that and I maintain full oil level at ALL times. Yes I check my oil regularly and if on a trip, every morning before a full day on the road. Being cautious is my thought so I don’t expect any issues.