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
///
/// buick-rover-v8@autox.team.net mailing list
///
|