Do I need to have a PVC???
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From: ECS Sales & Service Advisor
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Do I need to have a PVC???
This might be a stupid question but do I need to have a PCV valve at all?
I have no emmisions equiptment on the car at all.
I'm installing new Billet alluminum Valve Covers and I was all ready to drill another hole for the PCV when I started thinking what the heck do I need this for anyway???? I dont need it do I???? Can Just Pitch it?
:confused:
[Modified by Mike69, 4:28 PM 1/19/2002]
I have no emmisions equiptment on the car at all.
I'm installing new Billet alluminum Valve Covers and I was all ready to drill another hole for the PCV when I started thinking what the heck do I need this for anyway???? I dont need it do I???? Can Just Pitch it?
:confused:
[Modified by Mike69, 4:28 PM 1/19/2002]
Racer
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From: MESA, AZ, USA
Re: Do I need to have a PVC??? (Mike69)
Mike, assuming you have a '69 the answer is Yes you should have a PCV valve. Small and plugged into the valve cover, then a hose to the intake. At least I know that routing for sure for a BB. SB may route differently, but still have the PCV. It's a good thing that keeps your engine clean as well as helping with pollution.
Andy
Andy
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From: Severna Park Md
Re: Do I need to have a PVC??? (Mike69)
The only way I wouldnt run a PCV would be and all out race car, or a car that had such a big cam it was starving for vacuum on the bottom end. Its worth it to run one to keep all the nasty crankcase fumes outa your face. As fas as emission equipment is concerned the PCV is one thing I try to retain. If you decide not to run one you should have at least one breather in each cover.
Le Mans Master
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From: Orlando Floriduh
Re: Do I need to have a PVC??? (Mike69)
You cannot get rid of the PCV valve because it is part of the crankcase ventilation. It is there to prevent the vapors in the crankcase from igniting if the engine backfires. You could put a breather in the valve cover instead with no vacuum hose, but why ? You are not accomplishing anything by doing that. The PCV system hurts absolutely nothing and eliminates fumes (Blow by) in the engine compartment. The PCV systemis a good thing. Laeve it there. :D
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From: Severna Park Md
Re: Do I need to have a PVC??? (Jvette73)
Also, run your vacuum hose to the base of the carb as opposed to and individual runner on the manifold. This is important to PCV since its a constant draw of vacuum. If connected to an individual runner it could lean out that side. Keeping it at the base shares the burdon more evenly.
C6 the C5 of tomorrow
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From: Twin Cities Minnesota
Re: Do I need to have a PVC??? (fauxrs)
I ran my '69 for a year with only two breathers, Phew Stinky!
Then I ran One breather and a PCV, until I heard that unless you have a filtered breather youcould suck dirt into your engine!
Now I run a PCV and a line to the clean side of the air cleaner...Works great!
Then I ran One breather and a PCV, until I heard that unless you have a filtered breather youcould suck dirt into your engine!
Now I run a PCV and a line to the clean side of the air cleaner...Works great!
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Melting Slicks
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From: Toms River NJ
Re: Do I need to have a PVC??? (Mike69)
when i installed my zz4, i didnt have a breather hanging around and didnt want to throw on an old dirty one, so i left the red plug in there. Occasionally i could hear a loud squelling (which i thought was a bad throw out bearing) but was the motor pulling in air through the the plug in the grommet. I dont know why it pulled that way, cause i thought the carb pulled vacuum out of the heads. In any case, im sure you need at the absolute least a breather in there....
In the spring, im going to add breathers to mine like they are in my fathers motor...mounted permanetly and give a much cleaner look IMO
Chris
In the spring, im going to add breathers to mine like they are in my fathers motor...mounted permanetly and give a much cleaner look IMO
Chris
Melting Slicks
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From: Toms River NJ
Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL
one more thing mike......where did you find billet aluminum valve covers for centerbolt? I looked all over and ended up getting the same ones we have in chrome :(
Chris
Chris
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From: ECS Sales & Service Advisor
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Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (74VETTE)
Ok I'll keep the PCV! :lol:
I've been running with one and a breather on the other side.
Chris I picked them up at the Englishtown swap meet. Plan shinny allum! I'll post pics later inb the week... I need to get longer bolts for the heads!
:cool:
Thanks Guys!
[Modified by Mike69, 9:13 PM 1/19/2002]
I've been running with one and a breather on the other side.
Chris I picked them up at the Englishtown swap meet. Plan shinny allum! I'll post pics later inb the week... I need to get longer bolts for the heads!
:cool:
Thanks Guys!
[Modified by Mike69, 9:13 PM 1/19/2002]
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From: Eastern Shore, AL
Re: Do I need to have a PVC??? (Mike69)
Hey Mike if you havent drilled yet maybe it could go on the back of the cover? Does anyone know if it could go on either side? Was also wondering where it draws from the crankcase, where the oil drains,(?) and if so would oil resricters make some kind of difference? Haha, just looked at my post I'm full of questions, not :bs :D
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Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (Mike69)
Correct me if I'm wrong. I would only use the PCV valve and a sealed oil cap instead of a breather. By installing a breather, you may experience vacuum leaks. When using a PCV valve, your crankcase should be totally sealed. The PCV valve uses vacuum to suck out any blowby to ventilate your crankcase. By installing a breather, you'll be sucking in clean air all the time because your crankcase will not be sealed.
Le Mans Master
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From: San Diego CA
Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (bungoo2u)
Correct me if I'm wrong. I would only use the PCV valve and a sealed oil cap instead of a breather.
Le Mans Master
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From: Newburgh NY
Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (74VETTE)
one more thing mike......where did you find billet aluminum valve covers for centerbolt? I looked all over and ended up getting the same ones we have in chrome :(
Chris
Chris
Currently I was running breathers on both sides. After reading the above replies, I think I'm gonna swap out at least one breather for the PCV.
Thread Starter
Former Vendor
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From: ECS Sales & Service Advisor
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Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (78Vette-SA)
Thanks for all the info guys. That saved me.
Here's one more for you tho.
Can I mount the PCV Valve on the side of the cover or does it have to be mounted on top??? How about without a baffel???? It would be pretty much out of eye shot this way. But I'm afraid it could suck in oil, potentally causing problems...
:confused:
Here's one more for you tho.
Can I mount the PCV Valve on the side of the cover or does it have to be mounted on top??? How about without a baffel???? It would be pretty much out of eye shot this way. But I'm afraid it could suck in oil, potentally causing problems...
:confused:
Le Mans Master
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From: San Diego CA
Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (Mike69)
if you mount it on the side you may have problems with it closing - also I would think that you would be sucking a lot more oil which would be sucked directly into the carb (bad) - stick with it on top - use a billet cover or a billet valve - they look much nicer, und use braided steel lines if you want looks - I have also seen them hard plumbed with aluminum line and anodized fittings - very cool.
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From: Severna Park Md
Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (Mike69)
Is there enough clearence to the rocker arms if you mount it on the side? It could interfere. It would suck to cut the hole and then find out theres a clearence problem. Even if mounted on top it still needs to be in just the right place. In my opinion it should be mounted on top with a baffel to keep oil from being splashed in and sucked into the intake.
Ive seen some engines where the pcv mounts through the top of the intake manifold. So anywhere in the crankcase is the idea generally. Definatly want to keep it away from splashing oil as much as possible. In the rear of the cover, if it would even fit there,it would be lower, seems to me wetter with oil, encouraging more to be drawn to the intake. Its the gasses we're after, not the liquids. The big Q remains is there enough room to fit a baffel that would cover the protursion of the pcv and leave enough space for smooth air draw?
Ive seen some engines where the pcv mounts through the top of the intake manifold. So anywhere in the crankcase is the idea generally. Definatly want to keep it away from splashing oil as much as possible. In the rear of the cover, if it would even fit there,it would be lower, seems to me wetter with oil, encouraging more to be drawn to the intake. Its the gasses we're after, not the liquids. The big Q remains is there enough room to fit a baffel that would cover the protursion of the pcv and leave enough space for smooth air draw?
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Re: Do I need to have a PVC??? <----- what are you plumbing a house?? LoL (Jvette73)
Billet specialties also make a Billet aluminum PCV valve. I'm using one. PVC valve is inside. :cool: