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Old 11-27-2020, 05:54 AM   #16
51 MERC-CT
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Join Date: May 2010
Location: East Hartford, Ct
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Default Re: “Inside” part of road draft tube

Quote:
Originally Posted by msstring View Post
Not sure if I should pirate this string but it lines up with a question I was going to post. So will give it a shot. What size PCV valve do you guys use? Or, how do I know if I am getting enough air flow? I have a 1950 8BA, I used my original draft tube assembly and drilled a hole in the tube and treaded in a hose nipple. Then capped off the original draft tube at the bottom. From the new nipple I ran a rubber hose to catch can then to a PCV then to the manifold. The plumbing all seems to work out. But I don't know if I am getting proper flow through it. I'm not pulling a notable vacuum in the crankcase. I used a heater hose to make a sealed fitting on the dipstick.

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This is the way I checked for vacuum using the oil fill tube as the source.


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