[urq] Too much Crankcase ventalation?
QSHIPQ at aol.com
QSHIPQ at aol.com
Wed Sep 5 07:30:11 EDT 2007
It's not easy to get it right, I put that in the original response, btdt.
I'm pretty convinced that audi went after saving money on the design of the
DOHC valve covers... With a double wall design (I figured was used in the old
WRC cars) of the early 5k's, high rpm splashing isn't an issue. I suspect
that something similar in design to the cover that keeps splashing from
directly hitting the oil cap might help, along with a reroute of the rear breather.
I've also seen some pretty exotic design PCV baffles put in valve covers
(toyota has some really intriguing designs.
Every single car sold in the USA since 1968 has closed loop PCV. There are
plenty of high HP exotics included that don't require customers to empty
catch cans, or watch oil puking from the exhaust. Again, IMO, catch cans are the
easy answer to a more complicated issue.
In a message dated 9/5/2007 6:05:57 A.M. Central Daylight Time,
vegener at post7.tele.dk writes:
I would love if it was that easy -
Just now I am battling with too much oil in the catch tank.
My block is a WR 83 w/o the lower crankcase breather system connection (came
in 84 ).
I have placed a 3B 20V head and on top an ADU valvecover with plugs on coil.
This valve cover have an external oil returnline (I have realized now) and
are just making it working that way.
There is not much room inside the valvecover to find a place, where the cams
are not splashing oil and a strong accelerations
- high revs - the valvecover simply gets full of oil.
I have apparently a weak clutch (034EFI 800 Nm) and a 1/4mile where most of
the 12 sec are at the rev limiter 7800 rpm
can pump 3/4 litre of oil out. (not supposed to 7800 rpm but that happens)
I have a small returnline to the aux oil resorvoir at the 3B pan from a
Vortex air/oil separator but not big enough.
Urq-83 20V 525Hp
200 20V Avant 280Hp
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