It's been said before, but I run negative pressure in my crankcase to great
effect. There is no oil being pushed past seals and gaskets and there is a
belief that negative pressure promotes better ring sealing and reduces
internal disturbances.
This is not a new idea and it is commonly used by dragsters and stock car
racers.
SVRA sees it as something that would pass their tech and it always has
elsewhere.
Inexpensive and simple to install.
Joe A
-----Original Message-----
From: Scott Janzen <s.janzen@comcast.net>
To: Bobby Whitehead <igofaster@att.net>
Cc: FoT Triumph <fot@autox.team.net>
Sent: Sat, Mar 6, 2010 8:42 pm
Subject: Re: [Fot] crankcase ventilation
Now I'm curious- my GT6 has no crankcase ventilation- where's the breather
connection? Also- with all the open space between crankcase and valve cover
along the pushrods, why would a 1/2" tube on the crankcase make any
difference?
Sent from my iPhone
On Mar 6, 2010, at 3:05 PM, Bobby Whitehead <igofaster@att.net> wrote:
> My GT6 has been running with a catch tank for the valve cover and > plumbing
for the crankcase ventilation. I have been running the > valve cover blowby
into the tank but have run without the crankcase > ventilation plumbing into
the catch tank.
> Someone suggested that all British cars run better if the crankcase > is
being ventilated. This past weekend I ran the crankcase and valve > cover
blowby into the catch tank...dang... I'm gathering at least a > pint of blowby
in the emulsion tank in just a 15 minute run...
> I seem to recall Kas suggested a crankcase pipe of 1/2" inside > diameter...
my car has about a 3/8" port into the fuel pump spot > where it is
configureed...
> The hose for the blow by definately looks more oiley , but what is > the
opinion of the group of having so much run off in the catch > tank... I'm
getting blowby mist that I can see when the engine is at > idle with the oil
cap off... the GT is on the 3rd season without a > rebuild... wondering if I
retorque the head and adjust the valves if > I could reduce the blowby... or??
>
> Bobby Whitehead 1970GT6 DP CVAR
>
> looks like I purchased a race preparred Spitfire on eBay this week > out in
California... so... my wife is allowing a two racecar garage > for her
hubby.....
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