View Full Version : PCV Conversion 61 Tbird
11-09-2014, 07:27 PM
My 61 Thunderbird came with a road draft tube for crank case venting. What have others done to convert the tube. Links, Pictures, recommendations would be great.
11-10-2014, 03:44 PM
I used this set up on my '60 for about a year until I changed the engine.
Installed a breather cap with a side tab to connect a hose. Removed the road draft tube and installed a standard air filter breather adapter in a spare air cleaner assembly. Connected it all via hose.
Worked pretty well although it would still have a bit of vapors coming out of the breather cap at idle. You would have maximum vacuum on a true PCV system at idle to remove those vapors - however you have the least vacuum from the low rpms on the engine pulling in air in this case. I think my breather cap was the closed type - a vented/filtered one would have probably worked better. May not even need to connect a hose to it .
On the '60 there is a vacuum port used for the power brakes. Was planning on re-plumbing to that port until the engine died and I installed a rebuilt one from a '64 that already had the PCV ports etc.
Air cleaner breather hose filter
Just used an adapter that would fit where the draft tube went, a T and elbow I found at the parts store to connect it all together.
Hope that helps.....
11-10-2014, 05:22 PM
Keep your filler cap but replace the draft tube with a cap similar to what Eric suggested, but try to find one with a PCV valve in it such as this one:
I doubt that's an exact fit, but I always check for parts from similar year big block Mustangs. These were produced in large numbers and popular with collectors.
Then from the PCV valve, use a hose to a later model connector to the air cleaner as Eric has suggested.
The PCV valve is nothing more than a check valve, and the most common type is vertical, therefore readily available. If you use a cap like Eric's then you have to use a more expensive type that is only available from the on-line stores.
The '64 TBird uses a PCV valve in a near-horizontal position. Later models used the less expensive vertical.
11-11-2014, 09:52 PM
thanks for the reply and pics. very helpful link too. Thanks a bunch
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