oil out of breather under hard cornering

[zx_volcane]

Anyone like to shed some light on this?

Took zx out on track, and it decided to puke oil out of the breather hose - admittedly just floating in the engine bay

Made a mess, but only lost less than 500ml

Have not been able to replicate it since, even giving it absolute death on the way home / motorway.

Putting it down to hard cornering, as its spattered before after some spirited country rd driving.

So I've either overfilled it in the first place, or something else is causing it to throw up under hard cornering.

Any suggestions beyond fitting a catch tank?

Am I ok to leave the oil level on the lower side of the dipstick? Best procedure to measure level beyond having it on a flat surface, cold, hot ..etc

[Mattcheese31]

I mean anywhere between the marks on the dipstick is safe isn't it, not gonna do any harm being on the lower side i wouldn't imagine, it's not like the oil isn't reaching the top of the engine lol

[welshpug]

got a sump baffle? which way was the high G corners on the circuit?

I'd get the breather sorted, if its potentially puking then knowingly chucking oil on the road is not a great idea.

[zx_volcane]

got a sump baffle? which way was the high G corners on the circuit?

I'd get the breather sorted, if its potentially puking then knowingly chucking oil on the road is not a great idea.

no idea on which corner, mostly right handers at donnington

have fitted bottle to catch anything since, but not a drop on the 100mile+ journey home

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no baffles in sump, stock hdi ali sump

[bashbarnard]

Ive had it before on a couple of builds where the back pressure in the exhaust causes a rise in crank case pressures and then in turn it to piss oil out the breather. It seems odd that you havnt been ab;e to replicate it since though. Did you have high emps with the other setting of boost you were running on the day?? vanes not opening enough??

[zx_volcane]

Ive had it before on a couple of builds where the back pressure in the exhaust causes a rise in crank case pressures and then in turn it to piss oil out the breather. It seems odd that you havnt been ab;e to replicate it since though. Did you have high emps with the other setting of boost you were running on the day?? vanes not opening enough??

didn't change it for the drive home and gave it absolute death to redline

exhaust backpressure isn't insane on this vnt, peaks about 1.5x inlet - and in most cases it is equal to or under.

[welshpug]

I'd get a baffle in it if you plan on more track work, having the oil all on the left side of the sump away from the oil pump is not ideal and these engines don't have a windage tray either, not especially a concern as revs arent very high.

[zx_volcane]

I'd get a baffle in it if you plan on more track work, having the oil all on the left side of the sump away from the oil pump is not ideal and these engines don't have a windage tray either, not especially a concern as revs arent very high.

agree - but would it cause it to puke out of breather?

[welshpug]

depends which breather? head or bottom end?

[zx_volcane]

depends which breather? head or bottom end?

both feed into the oil filler - and then out the top of that via a single breather pipe