From Supra to G87 M2 or FL5 CTR or GR86/BRZ?

[GRMan]

S
Subaru and reliability? Bollocks. They can't even put the right amount of silicone or figure out how to get the car to turn without oil starvation and blowing up.
Add in forced induction and I'd trust Molly the stripper telling me she loves me before I'd trust a Subaru on track

So with all the 86 cup cars around the world, none of them can last a single race then...not the case

I am sure you will trust Molly the stripper more, that's at your IQ level

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[kaj]

Why won't you unless you are talking about a stock standard car? Most people boosted up their B58 or S55, S58 through JB4 or tune and the manual gearbox mated to those engines is rated to 550Nm only. May be the syncros will fail first before the gear teeth or vice versa but the fact is you cannot swap parts out on the ZF 6MT even if it's a little syncro failing is the context here.

like I said.....

So with all the 86 cup cars around the world, none of them can last a single race then...not the case

I am sure you will trust Molly the stripper more, that's at your IQ level

You think the cars at the dealership are built the same as Cup cars? Come on, now. It took a single search to educate myself.

https://900brz.com/posts/gr-cup-reliability

 

[Razors Edge]

So with all the 86 cup cars around the world, none of them can last a single race then...not the case

I am sure you will trust Molly the stripper more, that's at your IQ level

Nice try, it’s well documented and I have a GR86, and dealt with some of the issues.

Direct quote from the above article - “That said, I do know that these cars are still experiencing severe oil pressure drops in certain corners, like T2 at Sonoma. I know that there were no failures at Sonoma in 2024, but I don't have any information on subsequent races.

Ultimately, we still don't know the exact relationship between the pressure drops and bearing failures, but I continue to believe we need more robust modifications to the oiling system (such as the high capacity oil pan I'm developing with Verus Engineering) to reduce or hopefully even eliminate the pressure drops for long term track usage.”

Want to try again?

 

[Hasan]

So 5W-40 then?

 

[GRMan]

like I said.....



You think the cars at the dealership are built the same as Cup cars? Come on, now. It took a single search to educate myself.

https://900brz.com/posts/gr-cup-reliability

What are you on about? It's the same engine. Just with additional cooling components. The argument was their engine design is shit and can't handle a few hard corners which is obviously not the case.

 

[GRMan]

Nice try, it’s well documented and I have a GR86, and dealt with some of the issues.

Direct quote from the above article - “That said, I do know that these cars are still experiencing severe oil pressure drops in certain corners, like T2 at Sonoma. I know that there were no failures at Sonoma in 2024, but I don't have any information on subsequent races.

Ultimately, we still don't know the exact relationship between the pressure drops and bearing failures, but I continue to believe we need more robust modifications to the oiling system (such as the high capacity oil pan I'm developing with Verus Engineering) to reduce or hopefully even eliminate the pressure drops for long term track usage.”

Want to try again?

I also had a GR86 and drive it balls to the wall every time for a year and nothing broke. I also know multiple GR86 owners that track regularly and nothing broke. I also followed GR86 cup series in a few countries. and their engine last a season before needing a refresh.

The consensus from a few race mechanics is momentarily pressure drop does not cause engine failure. There seems to be a few engine blown up in the US but I have not heard of much in other countries.

You come and try again

 

[PikkaGTR]

So with all the 86 cup cars around the world, none of them can last a single race then...not the case

I am sure you will trust Molly the stripper more, that's at your IQ level

https://900brz.com/posts/gr-cup-reliability

Iono about IQ, but it seems Molly has taken some of yours away.
The fact that there have been 9 million revisions to an aftermarket oil pan design means there's a market for it.
Toyota and Subaru KNEW it has oiling slosh issues either internally or thru testing. No reason to make a modification if it didn't need it.
For example the OEM S54 oil pan also has baffles to prevent high corner G load oil slosh. It isn't new tech

 

[johnsmither]

Interesting thread. OP just go to a track day and you'll see all these cars. Talk to the owners and see what real world issues they face. It all comes down to why you don't like the Supra and what you'd like your next car to have that your current fleet doesn't do already.

All these platforms are tested and have specific quirks that needs to be addressed. All can be pretty good.

 

[romanLegion9574]

awesome feed back this really helps me with my pending decision on dropping my 86 for a GR Corolla or a CTR for a better track/daily balance as I am daily driving my supra right now and looking to slow down the miles accumulating on it.

Did you ever consider the Integra type S? seems like might thread that needle the CTR doesnt manage to.

I've got a GRC, and it's not really designed for track work. The brakes overheat without proper airflow to them, and the center diff sensor overheating (because the exhaust is right next to it) putting the car in FWD mode is also an issue.

The Supra is much better suited to track work.

 

[romanLegion9574]

awesome feed back this really helps me with my pending decision on dropping my 86 for a GR Corolla or a CTR for a better track/daily balance as I am daily driving my supra right now and looking to slow down the miles accumulating on it.

Did you ever consider the Integra type S? seems like might thread that needle the CTR doesnt manage to.

Love the pics from the Ridge!

 

[GRMan]

https://900brz.com/posts/gr-cup-reliability

Iono about IQ, but it seems Molly has taken some of yours away.
The fact that there have been 9 million revisions to an aftermarket oil pan design means there's a market for it.
Toyota and Subaru KNEW it has oiling slosh issues either internally or thru testing. No reason to make a modification if it didn't need it.
For example the OEM S54 oil pan also has baffles to prevent high corner G load oil slosh. It isn't new tech

Oil pan or not has nothing to do with the strength of the engine, ok? Molly IQ my dude

The FA24 engine block, pistons, conrods, crankshaft can take up force induction no problem. The HKS Supercharger is fairly small so won't put much stress on the engine and the GR86 is a very light car in today's term. OP can consider this path if his concern is straight line speed on the track. Obviously, turbo is better, but it comes with a cost and more risk.

Stock cars needing a bigger oil pan or modified oil pan, thicker oil for heavy track work is nothing new. Some people are treating it as the sky is about to fallen. Even the godly RB26DETT needs oil cooling upgrades if one is serious about speed, and this was like 30 years ago.

 

[PikkaGTR]

Oil pan or not has nothing to do with the strength of the engine, ok? Molly IQ my dude

The FA24 engine block, pistons, conrods, crankshaft can take up force induction no problem. The HKS Supercharger is fairly small so won't put much stress on the engine and the GR86 is a very light car in today's term. OP can consider this path if his concern is straight line speed on the track. Obviously, turbo is better, but it comes with a cost and more risk.

Stock cars needing a bigger oil pan or modified oil pan, thicker oil for heavy track work is nothing new. Some people are treating it as the sky is about to fallen. Even the godly RB26DETT needs oil cooling upgrades if one is serious about speed, and this was like 30 years ago.

Missed the point completely my friend , I said Subaru and reliability should never be in the same sentence, pointing out stock cars blowing engines from excess RTV or right handers on a back road, then you go off a tangent on Cup cars and all.
The amount of BRZ/FRS and GT86 FA20s that are blowing engines left and right is hilarious and well documented. They haven't fixed any off that issue with the FA24.
Btw a stock M car doesn't need bigger oil pans, baffles and such to be reliable on track as they are well designed from the factory.
Keep drinking that copium thinking Subaru had made a reliable product

 

[tracer bullet]

Keep drinking that copium thinking Subaru had made a reliable product

Indeed, or we'll have to start talking about their head gsakets.

 

[jmikes]

GR86's/BRZ's are great cars for what they are but are, at the end of the day, entry-level cars that are made to be affordable and fun for daily driving. Yeah they can be pretty good on the track, but it's a terrible idea to downgrade from a Supra to a GR86.

For the wonderful benefit of back seats that only children can use, you get a less comfortable car with a worse interior, less tech, the power to weight ratio of mom's hybrid SUV, and a less reliable engine. Sure you can SC/Turbo the GR86, but it will get to 270-300 WHP before you have to build the engine to reliably handle the boost, and it will still be slower than the Supra in just about every regard.

 

[Hasan]

Interesting thread. OP just go to a track day and you'll see all these cars. Talk to the owners and see what real world issues they face. It all comes down to why you don't like the Supra and what you'd like your next car to have that your current fleet doesn't do already.

All these platforms are tested and have specific quirks that needs to be addressed. All can be pretty good.

Just stay away from the miata gang.

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