PVC????

are ui gonna bubba up your engine compartment with PVC pipe??
:confused: :D :D

 

Mike69,

Why does Philadelphia fans need PCV valves on their vettes?

B/C they both suck and blow at the same time.


:lol: :lol: :lol: :lol:

I'm sorry I couldn't resist......Pls resume discussion about crankcase ventilation.

 

Mike,
It would be a good idea to have baffles. I think there was an article in Corvette Fever about oil problems and one thing it mentioned was that valve covers need baffles if you are running PCV. If I get time today, I'll look it up and post the info.

 

Well now you've got me thinking...

Why NOT use one PCV with no other ventilation, Whouldn't that just suck the blowby out and create a partial vavuum in the crankcase?
I mean people spend big $ on vacuum pumps to do just that!

 

Billet PCV huh??? I'll look into that...

Topless you are going to get it. you know that right? Damn Dallas fans!!! :lol::lol::lol::lol:

Thanks for the Ideas guys... I guess I'll keep the PVC.... or I mean the PCV for now!.... I dont want it sucking oil by putting it in the side... BTW< it would have easily cleared, but oil could have easily splashed up on the valve.

Thanks!

Mike


[Modified by Mike69, 4:19 PM 1/21/2002]


[Modified by Mike69, 4:44 PM 1/21/2002]

 

Pic's not real good---I had to enlarge it. Jeg's has them with the chrome air cleaner's and dress up items.

 

That looks pretty darn good! It will definately work!

Thanks for the pic!!!

:cool:

 

You're welcome. I was thinking of getting some plain SS braided hose(w/o the end clamps) or maybe some of that flex-braid stuff to connect to the carb. It'd look better than black rubber :yesnod:

 

Dont Count on that. I used to use that SS braided stuff on another car and it was really a PITA to keep clean. The Flex stuff looks pretty good but I have seen some that discolors. Not that this would be a problem with the PCV, but it's a definate possibility other places on the engine.

MY advise would be to keep the plain black hoses, and get some nice billet hose clamps. It really gives a clean look to the motor without giving a ton of maintaince! Summit sells them cheap! Check them out.

:cool:

 

Can't tell from the pic, but do you have power brakes, too? If you do and the PCV is connected to thelarge part on the rear of the Holley baseplate, where are you pulling brake booster vacuum from?

 

No I have NO PS, PB, PW....no power nothing....I'm just glad the engine turns over. :lol:

 

I run a holley carb and a pcv with power brakes. I put the pcv valve in the top towards the rear of the passenger side valve cover. Since the outlet for vacuum is on that side of the carb, it makes the hose shorter. For the power brakes I put a T fitting in the hose and ran the other end to the brake booster.

 

Correct me if I'm wrong, but isn't a PCV valve just a a gravity operated check valve? When vacumm is present the ball inside pops up, opening the flow of gasses to the carb. When no vacumm is present, the ball falls to the bottom of the PCV and closses the flow from the valve covers. If all the above is true, then mounting the PCV on the side of the cover could create oil freely flowing into the valve..and it's gravity operation would be effected. Did I miss the mark here or am I just all wet??? :confused: :cheers: :cheers:

 

Just out of curiosity, what would happen if you put a PCV valve on each valve cover, no breathers?

 

The breather provides a means to get fresh air (filtered) into the crankcase to replace the air evacuated by the PCV. You have to have both for the system to be effective. The usual setup is breather on one bank, PCV on the other. Don't put them on the same bank or the PCV may pull outside air in through the breather and not relieve the crankcase properly.

 

Hmmm. This has caused no brake problems? Seems like the brake booster should have a vacuum source that's isolated from things like PCV. I've been looking for a plausible PCV setup and have considered having it share vacuum from the power brakes but it just doesn't seem right somehow. If it can work with no problems I might try it out. Gently at first....

 

The Dude, I have used this setup with no ill effects on the brake booster. If the brake booster is working properly it will store a vacuum draw to a certain point. If its a good booster it should not even need a constant supply of vacuum. Once it has stored its capacity of vacuum it no longer draws from from the engine. When you apply the brakes some vacuum is used but should be rapidly replaced, to its limit, by available engine vacuum. If your brake booster is good this setup works good. It does for me anyway. A good brake booster should hold vacuum long after you shut down the engine. Hours...days....a long time. To check the booster run the engine for a few seconds to put vacuum in the booster. Shut it off and pull the check valve feed connection out from the booster and you should hear the hissing of air rushing in to fill the vacuum. Then try it again but wait a considerable amount of time before pulling the check valve. Even after a long wait like over night, it should still be storing vacuum. If not theres a leak in the booster or check valve connection. My Holley 600 has the pcv connection coming out the side of the baseplate towards the rear part of the carb. I located my pcv top rear of the passenger side valve cover close to that connection. One breather on the oposite valve cover. It makes about a 6" piece of 3/8 fuel hose to go from the valve to the carb. I put a T fitting into this 6" piece of hose and brought it back behind the carb up to the booster. I covered the hoses with courigated wire harness wrap in black. It gives it kinda a space age look.