That is a good explaination of the operation of the PCV. Thanks Dave. In my
experience the PCV is all to often overlooked as a source of engine
performance trouble. Sometimes they stick open, and sometimes they stick
closed, and sometimes they stick somewhere in between. Routine cleaning or
replacement is a good idea.
Regards,
Jim B.
----- Original Message -----
From: "David Kernberger" <dkern@napanet.net>
To: "bown" <bown@concentric.net>
Cc: <buick-rover-v8@autox.team.net>
Sent: Sunday, October 28, 2001 3:46 PM
Subject: Re: Help With PCV setup for Rover V8
> Jim et al.
>
> I think you have hit the nail on the head. The only purpose of the
> Positive Crankcase Ventilation valve (PCV valve) is to restrict suction
> applied to the crankcase under conditions of high intake manifold vaccuum
> but to remove all such restriction when manifold vaccuum is low. Too much
> air and crankcase vapors entering the engine under high vacuum conditions
> would unnecesssarily dilute the air/fuel mixture and rob the engine of its
> full power potential.
>
> Conditions of high manifold vacuum typically include idle, downhill
> deceleration, and to a lesser extent, any light load part-throttle
> operation. Low manifold vacuum usually occurs when the throttle is fully
> open, or nearly so, such as during sustained heavy pulling or rapid
> accleration. Hope I am not talking down to anybody here.
>
> Cheers,
>
> David Kernberger
>
> -------------------------------------------------------
>
> >I have an Edelbrock 4-Barrel and am using the PCV port (center and large
> >port). It seems to work fine. I wonder if John might have had a
defective
> >PCV (valve) that was allowing excessive flow?
> >Regards,'
> >Jim B.
> >
> >
> >----- Original Message -----
> >From: "John Elliott" <john@elliottjohn.fsnet.co.uk>
> >To: "Don S" <goldtr8@nconnect.net>
> >Cc: <buick-rover-v8@autox.team.net>
> >Sent: Saturday, October 27, 2001 7:11 PM
> >Subject: Re: Help With PCV setup for Rover V8
> >
> >
> >> I have an edelbrock 500 (aka weber 500) on an edelbrock performer
> >manufold.
> >> The edelbrock has a pcv port (the centre and largest of the vacuum
ports)
> >> but when I used it there was so much suck that the engine inflow (the
> >small
> >> tube on the other rocker cover) was actually whistling. Now I have the
> >> breather connected to the spigot on the low rider manifold and this
works
> >> fine on an engine in good condition
> >> John Elliott
> >> TR7 FHC Russet Brown
> >> 3.9/edelbrock 500/GM180 almost back on the road
> >> TR7/8 Registrar
> >> TR Register UK
> >> www.tr-register.co.uk
> >>
> >>
> >> ----- Original Message -----
> >> From: "Don S" <goldtr8@nconnect.net>
> >> To: <buick-rover-v8@autox.team.net>;
<flying-wedges@mercury.lcs.mit.edu>
> >> Sent: Saturday, October 27, 2001 10:31 PM
> >> Subject: Help With PCV setup for Rover V8
> >>
> >>
> >> > A question for those of you who have put a 4 barrel carb on your
Rover
> >> > engines.
> >> >
> >> > How did you hook up a PVC system. I have something cobbled right now
but
> >I
> >> > don't want to reinvent the wheel so to speak.
> >> >
> >> > thanks
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