Dry sump venting open or closed.

[Morris]

Originally Posted by Ant

Morris, I tend to agree with you, as some racer friends have had similar problems with oil puking, and reversing the seals makes sense as well, dont want to go down that path really. I gather you solved the puking when vented the covers?

Ant.....yes we did solve the puking issue.....and I believe the Blue Thunder valve covers helped a bunch......I'll get you some photo's tomorrow...

[Morris]

Ant

Here's a couple of Photo's of the valve covers and catch can and tank and catch can vent..... Hope it helps out...

[Ant]

Originally Posted by Morris

Ant

Here's a couple of Photo's of the valve covers and catch can and tank and catch can vent..... Hope it helps out...

Thank you for the photos, that is a good adequate system I gather the FE can breath a bit more compared to SBF when you have the hp and rpms like you have.

[Morris]

Originally Posted by Ant

Thank you for the photos, that is a good adequate system I gather the FE can breath a bit more compared to SBF when you have the hp and rpms like you have.

We believe that the more you can allow a motor to breath..... the better it is.... When you get half way thru a race ..... and it's hot and everything has a strain on it .... you are glad it can breath....

Vacuum is for short drag racing type of motors....... not extended time on a track.... like a Cobra is made for...

Look at the 3 Scavenge section hose on the back of the intake....

[PLDRIVE]

Originally Posted by Morris

We believe that the more you can allow a motor to breath..... the better it is.... When you get half way thru a race ..... and it's hot and everything has a strain on it .... you are glad it can breath....

Vacuum is for short drag racing type of motors....... not extended time on a track.... like a Cobra is made for...

Look at the 3 Scavenge section hose on the back of the intake....

You might want to tell NASCAR that. They pull 18+Hg for 500 miles every Sunday.

[Morris]

Originally Posted by PLDRIVE

You might want to tell NASCAR that. They pull 18+Hg for 500 miles every Sunday.

That's right.....and the thickness of their scavenge sections are the reason for that.......a Cobra just doesn't have enough room for the size of their pump .... 4 scavenge sections and a pump section.....also the newer pumps are much more efficient then the older pumps..... On our Cobras ....their is barely enough room in the motor area....at least not in our FE configuration.

[Cobra #3170]

Originally Posted by Morris

That's right.....and the thickness of their scavenge sections are the reason for that.......a Cobra just doesn't have enough room for the size of their pump .... 4 scavenge sections and a pump section.....also the newer pumps are much more efficient then the older pumps..... On our Cobras ....their is barely enough room in the motor area....at least not in our FE configuration.

For what it's worth I am pulling 13" of vacuum on my 498" FE, I have a Dailey
Dry Sump with #16 lines to and from the tank. My valve covers are sealed
and the only vent is on the Stef's dry sump tank in the trunk. I have not really had any problems with this system and don't seem to have an oil vapor problem in the trunk. We tried it on the dyno with vented vs unvented valve covers and there was a difference of about 20 HP. What I really like is the engine compartment stays really clean compared to the times I had remote valve cover breathers with baffles etc. The only time oil gets out of this thing is when it is not running, then it leaks like an old Harley.