pcv
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Fleet Owner
Joined: Jan 2004
Posts: 26,007
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From: Brentwood,CA
pcv
do you need to run the pcv the carb i bought does not have a hook up for one and the only vacuum hose i could use is going to the brake booster could i put a tee in the line and use it but the vacuum fitting is right in front of the number 4 piston won't all the gases from the pcv go into that piston and that piston only would that be a problem could that cause it to run rough or foul the plug.
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
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From: CT
What year 390? And does the intake have a rear breather plate or is it solid and unmachined? If the intake has the removable plate you can replace the plate with one that has a nipple and run the PVC from the pass valve cover to the rear breather nipple. Just a thought but not sure what your working with. G.
New User
Joined: Mar 2005
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I don't know what type of air cleaner you have, but I'll assume a standard round open element. What you can do is drill the underside of the filter base, and install a grommet, and a short piece of tubing, and route the pcv hose to that. I'm sorry if that is difficult to visualize. One advantage with running a PCV hose like this is the oil vapor is very stable (in combustion) so on older engines that have a large quantity of oil vapor emitting from the PCV you can advance the timing more without detonation. It only halps out a little bit, but is more noticable in lighter cars. Good luck -Kevin
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Joined: Jan 2002
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From: Centreville USA
What FFR428 said.
You need to run some sort of crankcase evacuation system unless you enjoy dealing with internal pressure build up with the resultant oil leaks. Even a set of old fashion breathers on the valve covers would be better than nothing.
You need to run some sort of crankcase evacuation system unless you enjoy dealing with internal pressure build up with the resultant oil leaks. Even a set of old fashion breathers on the valve covers would be better than nothing.
Senior User
Joined: Jan 2002
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From: Centreville USA
Originally Posted by bertha66
You can get a carb base plate with a nipple for the PVC, it would go between the manifold and the carb.
Postmaster
Joined: Feb 2003
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Originally Posted by kkmcclain
I don't know what type of air cleaner you have, but I'll assume a standard round open element. What you can do is drill the underside of the filter base, and install a grommet, and a short piece of tubing, and route the pcv hose to that. [snip]
I really doubt that this setup would provide enough vacuum to make the pcv system work. This would work for the "intake" side of the pcv system (to the oil breather on the driver's side of the engine) to provide clean filtered air to the inside of the engine.
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Posting Guru
Joined: Jul 2003
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From: Colville, Washington
Originally Posted by 76supercab2
I really doubt that this setup would provide enough vacuum to make the pcv system work. This would work for the "intake" side of the pcv system (to the oil breather on the driver's side of the engine) to provide clean filtered air to the inside of the engine.
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Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
ok i i figured it out some fe's had a carb spacer that had the pcv port built in which is why the carb i bought does not have one so i am going to use one of those i found but it also has a coolant passage running through it whats that for.
Lead Driver
Joined: Oct 2004
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From: Central Oregon
Originally Posted by ford390gashog
ok i i figured it out some fe's had a carb spacer that had the pcv port built in which is why the carb i bought does not have one so i am going to use one of those i found but it also has a coolant passage running through it whats that for.
Laughing Gas
Joined: Jan 2002
Posts: 1,008
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From: Tucson
Don't put a T in your brake booster vacuum line. I tried it and it robs enough vacuum from the booster to have a pronounced effect on braking. It's dangerous. Good luck and let us know what you end up doing.
jor
jor
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From: Centreville USA
Originally Posted by ford390gashog
ok i i figured it out some fe's had a carb spacer that had the pcv port built in which is why the carb i bought does not have one so i am going to use one of those i found but it also has a coolant passage running through it whats that for.