Re: The Duchess Project: 1940 Super 8 Convertible Sedan
Posted by Joe Santana On 2013/5/13 19:13:12
CARBURETOR
The official photo of the fuel pressure test is below, but the original had a bath-towell and fire extinguisher in it. Plenty of cautions in the instructions. What is all this trepidation about? You're car guy now. Gee, it was so easy. Car cranked up running on the fuel in the bowl and the needle swung over to 4, almost lbs of pressure. Easy as pie. No explosions, fires, etc.
Of course, one danger, they don't mention. The big surprise of spurting gas when you disconnect almost 5 PSI of fuel. So I did need the towel after all. But I got a good reading.
It takes 2 people for the fuel delivery test, so I didn't do.
Maybe the vacuum advantage isn't working. Three things. The vacuum from the carburetor, which could be switch to the manifold. The diaphragm (if the advance level doesn't on acceleration, and the spring, if it doesn't retract when acceleration is released. The latter require 2 guys or more and longer arms. Like Sonny Liston could do it, but that's about all. The vacuum I could test. There's a movie of it here:
http://www.mktx.com/joe/CarbVacuumAdvTest-desktop.m4v
Popped right up to between 15 and 20 in. of Hg.
Since those things seemed to be working. I removed the carburetor again. Opened it up again. I sprayed it with acetone. The new leather piston looked good. Then I checked the floats. I removed them and held them down in a pot of water. No bubbles. The measuring device that came with the kit is pretty crude, but they looked like they were in the ballpark. I had to leave for the airport, so I didn't get a chance to see if gas is still above the level hole. I'll do that tonight and if so, I'll bend them up (per the photo) which is actually down, using a precise measurement device.
The fluffing problem is related to heat. It doesn't happen when I "push" pedal to the metal (brief) through all gears within the first, say, 15 minutes of operation. But once it warms up, to normal, straight up, the fluffing begins if I push it.
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The official photo of the fuel pressure test is below, but the original had a bath-towell and fire extinguisher in it. Plenty of cautions in the instructions. What is all this trepidation about? You're car guy now. Gee, it was so easy. Car cranked up running on the fuel in the bowl and the needle swung over to 4, almost lbs of pressure. Easy as pie. No explosions, fires, etc.
Of course, one danger, they don't mention. The big surprise of spurting gas when you disconnect almost 5 PSI of fuel. So I did need the towel after all. But I got a good reading.
It takes 2 people for the fuel delivery test, so I didn't do.
Maybe the vacuum advantage isn't working. Three things. The vacuum from the carburetor, which could be switch to the manifold. The diaphragm (if the advance level doesn't on acceleration, and the spring, if it doesn't retract when acceleration is released. The latter require 2 guys or more and longer arms. Like Sonny Liston could do it, but that's about all. The vacuum I could test. There's a movie of it here:
http://www.mktx.com/joe/CarbVacuumAdvTest-desktop.m4v
Popped right up to between 15 and 20 in. of Hg.
Since those things seemed to be working. I removed the carburetor again. Opened it up again. I sprayed it with acetone. The new leather piston looked good. Then I checked the floats. I removed them and held them down in a pot of water. No bubbles. The measuring device that came with the kit is pretty crude, but they looked like they were in the ballpark. I had to leave for the airport, so I didn't get a chance to see if gas is still above the level hole. I'll do that tonight and if so, I'll bend them up (per the photo) which is actually down, using a precise measurement device.
The fluffing problem is related to heat. It doesn't happen when I "push" pedal to the metal (brief) through all gears within the first, say, 15 minutes of operation. But once it warms up, to normal, straight up, the fluffing begins if I push it.
Attach file:
(95.38 KB)
(63.06 KB)
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