Supercharged BBC.. too much crankcase pressure

[calvin]

I have a D1R on a BBC, and I'm very annoyed at the oil being pushed out of the rear main seal. I've replaced the seal (two piece) and it still does it. I'm sure it's because I got a bit too much CC pressure. Aside from a vacuum pump (which I have no room for)..is there anything you can suggest to pull pressure down?

Thanks for the help

Signed,
Sick of seeing my trans covered in dusty oil film!!

[Johnny Blaze]

What does your crankcase ventalation system currently consist of?

[calvin]

I'm ashamed to admit it but just two K&N 2.5" breathers..one on each valve cover :)

[Johnny Blaze]

Any issues with oil coming out the breathers?

[Todd in Vancouver]

Not saying this will solve your issue but I also had a similar situation on a car years ago and this helped to resolved it.

http://www.summitracing.com/dom/parts/mor-25900/overview/

[calvin]

No..not really



Any issues with oil coming out the breathers?

[705.0Merc]

For my single turbo I vent my crankcase with a 3/8" fuel line from a valve cover to my airfilter on the inlet of the turbo. I put in a clear fuel filter to make sure it's not sucking oil. I have a breather on the valve cover too. It's temporary for now until I come up with something better like with a catch can.