Re: Oil Blowby
Hi guy's
The A engine came out before the "Road draft tube" was standard on latter motor's. The filler pipe is the only way in or out on the A engine (blow-by)
The fumemaze "pipe" is a halfway cure..but it will keep the mess off the firewall..To make it work you'ed have to make some kind of "Vent" over on the valve cover side..
As you go down the road the vacuum on the end of the pipe from the air passing by it will suck the blow-by out of the engine.
Fresh air will enter at the Valve cover. Now you can see how the road draft tube work's.. It was used for year's. "But" with million's of car's using this system there were fume's going out into the air....
This why the PCV "System" came into effect.. It sucked the fumes out of the engine and "Metered" them back to the intake to be burned.. This is what I have on my engine & it work's well...It suck's fresh air in the filler pipe....It's what's called a "open" system..Modern car use a "closed" deal
In the "How to restore your Model A " volume "4" there are two tip's shown..First one is how to install a PCV valve on page 31. Second one is showing a vent on page 92.
The way the guy did the vent could cause a problem if there were a backfire..could blow the pan off !!! This will not happen with a PCV valve installed as it will close in case of a back fire.
Good luck with whatever "system" you choose ....
Greg out west
|