GR86 Engine Failure

I'd recommend cooling and baffled sump for track, baffled sump alone won't suffice

I do know of someone who had an 86 and following a track day the engine is knackered, not RTV but from oil starvation I think he said from prolonged right hand high speed cornering. Ended up with a knocking sound. I think I've read similar issues from trackdays on some of the US forums.
He's an engineer and suggested it needs thicker oil for track days, the standard is too thin causing the oil starvation.

SJR202 said:

I do know of someone who had an 86 and following a track day the engine is knackered, not RTV but from oil starvation I think he said from prolonged right hand high speed cornering. Ended up with a knocking sound. I think I've read similar issues from trackdays on some of the US forums.
He's an engineer and suggested it needs thicker oil for track days, the standard is too thin causing the oil starvation.

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Thicker oil is not a fix for an oiling issue in long corners.

Low pressure in long corners would most likely be caused by the oil not returning to the pickup. If there is no oil at the pickup it doesn't matter what thickness of oil you run.

Thicker oil is more likely to assist where you are losing film strength because it's getting hot.

I overfill 0.7-1 litre in my car, I don't bother to take out the oil after the track day.

I ran a stock oil cooling at Spa and found the oil temp to hit 125c and rising. I was running 0w30 Mobil 1. From the next oil change on, I will be running Titan Race Pro S 0w30.

I considered changing to 0w40 if the temps didn't improve much with the Greddy Oil Cooler.

Did a track day at Bedford with the Greddy and happy to report the oil temp didn't pass 105c even after 8 hot laps. So will continue to run 0w30 and change oil every other track day.

Oil starvation on high G's right handers 'IS' an issue but I only think this is an issue if you can can generate these high G's. Unless your car is set up to chase lap times with proper Track Suspension and sticky wide tyres, I doubt you will generate the G's to worry about oil starvation.

So far, all the oil pan baffles on the market have not been able to cure the oil starvation issues. I think someone needs to make a redesigned oil pick up but I think the issue with that, is the engine needs to be stripped to fit it. The current oil pick up cannot be changed just by taking off the sump pan.

In relation the the poll, I think my car with the oil cooler fitted, I doubt Toyota will warranty the engine if anything happens. Hopefully, it will never come to that!

Here are the vids of the 2 track days I done:

It'll be the 900brz/Verus revised oil pan that many of us will be waiting for, assuming it's at the very least just a bit bigger in volume, but seems to have helped. Got my eye on that development.

Don't think any baffles have really helped except syms (paired with their pan perhaps?), so overfill has been the main workaround for now.
Thicker oil + cooler helps with higher nominal pressure, and may well mean that a dip in pressure isn't as severe but who knows.
Plenty of info on gr86.org on it!

Surely an accusump is the most logical solution for prolonged track driving. Never had one myself but since I started dabbling in track driving 12 years ago I've only heard good things about them.

Accusump is the correct mod for a track car. In my opinion, anything that is going to have bearable ride comfort on the road, is not going to generate enough G to have to worry about the low oil pressure issue.

Is this mod not fairly common in the US mostly due to the widespread abysmal low octane fuel sold at most of their “gas” stations. Unless I’m mistaken and their octane grading/rating is different to ours here.

Hachi-roku said:

Is this mod not fairly common in the US mostly due to the widespread abysmal low octane fuel sold at most of their “gas” stations. Unless I’m mistaken and their octane grading/rating is different to ours here.

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Yes and a lot of manufacturers sell cars that are flexfuel models like VW, Ford and Chevrolet.

KobayashiMaru86 said:

Isn't it used by those who run ethanol?

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Yes E85. Over 22 million equipped cars in the US, France has a lot of fuel stations for E85.

I'll add my part.

My car have a complete short block replacement and also cam sensors replaced under warranty. The middle of my original block was leaking oil non stop.

That issue did really put me off touching the engine, but with the replacement block run in now and is happy that the issue is fixed.

The GR86 is gonna stay as a 99% road car and I have a dedicated track toy for those sunny track days. Not gonna worry about oil pressure or oil temp for now.