Gen1 Blowing oil smoke after hard corners at Laguna Seca

[Maxoverclock]

Need some help diagnosing new issue. This is the first time this has happened. After taking hard corners in lower gear (5-6K rpm), I am accelerating and when I floor it after exiting I am puking giant cloud of smoke from the tailpipes. This did not happen at Sonoma raceway. I am also getting oil on the breather, drivers side valve cover, which also did not happen before.

Is it possible I am filling up the top end and I am sucking oil through the valve stem seals? Why would this start happening now and not before? Or could I be sloshing oil up the cylinder walls and extra is getting into the cylinders.

The smoke clears right away after a slight hesitation while it is burning off but I have to resolve this issue as it is not acceptable and covers the car behind me in a wall of smoke and clearly something is not right since it has never happened before.

I do have a HV oil pump so this may be the issue, pumping too much oil into the heads with too slow drainage, just not sure why it just start happening at Laguna and not at Sonoma....

 

[TMSBOSS]

Welcome to the site.

What car and engine are you running.

 

[Maxoverclock]

Welcome to the site.

What car and engine are you running.

I have a 65 Mustang setup for road courses.

engine is a 363 with AFR 186 heads.

 

[blacksheep-1]

A couple of things to consider, an oil/ vapor separator and possibly a pan evac system.
Assuming the engine is in good shape.

 

[Maxoverclock]

A couple of things to consider, an oil/ vapor separator and possibly a pan evac system.
Assuming the engine is in good shape.

I have a separator between the PCV and intake. Engine has 6 track days and 1000 street miles on it so pretty new still.

 

[navseng]

Post pics of your breather setup. Also, valve covers and are they baffled? Could be lack of drain back in the heads and your pushing oil. Could also be a directional thing since sonoma and laguna are mostly opposite directions, is the breather only on one valve cover?

Id bet you're pulling oil through the pcv though, is it on the passenger side?. Pull that and see if it's got signs of oil past your separator. If it's a track car I would be inclined to just run a catch can setup from both valve covers and not run a PCV .

This is how a lot of the vintage race cars are done just two baffled breathers and run a hose to a remote catch can.. Extending them up higher like this pic or the "R" model style is also something that is commonly done, and I would recommend.

 

[PatrickStapler]

Same here…sans breather caps, just some AN fittings.

 

[Fat Boss]

Where specifically was it on the track? I was following a '68 CA Special and he belched a gigantic cloud of smoke between turns 2 and 3. I thought he for sure blew up the engine. I talked to him later and he could find nothing wrong with it.

 

[Maxoverclock]

Same here…sans breather caps, just some AN fittings.
View attachment 91539

Thanks for the picture. I am going to setup my system very similar how you have it setup and see if my problems are eliminated.

 

[Maxoverclock]

Thanks for the picture. I am going to setup my system very similar how you have it setup and see if my problems are eliminated.

So far so good since the changes. Plumbed in some hard lines to the front of both the valve covers. So far no oil in the catch, only some condensed water vapor. Will call this issue resolved.

 

[PatrickStapler]

Glad you got it sorted. I learned quickly to watch and mimic what the “long horns” were doing. They’re some smart dudes out there…