|
Group: Forum Members
Last Active: 5 Years Ago
Posts: 471,
Visits: 2.4K
|
I don't think you'll have much success looking down a Teapot carb.
It's very difficult to see anything
|
|
Group: Administrators
Last Active: 5 days ago
Posts: 7.2K,
Visits: 202.7K
|
Half-dude (9/21/2016)
Is there a way to visually check if that's whats happening? Like can I see a flow of fuel from the power valve through the choke plates or anywhere else?No. You can’t see the extra fuel visibly. Even if you could look into the primary side of a Teapot when it was running, the enrichment circuit doesn’t dribble or pour the extra fuel into the carb. It is metered in as atomized fuel through the main power circuit. If you have a wide band oxygen sensor hooked up to the car, then you should be able to detect the richer fuel mixture as it’s going out the exhaust when the power valve is open. The power valve enrichment holes themselves are quite small and affect the idle mixture only slightly. Those particular holes supplement the main fuel circuit which comes into play only when there’s enough air flow through the venturies in which to activate that particular circuit. That circuit using that diaphragm in which to work the power valve is very touchy in getting the diaphragm perfectly sealed to the cover so that the manifold vacuum keeps the diaphragm in a ‘pulled up’ position in normal circumstances. The power valve is normally open when the engine is not running and as soon as it starts, the power valve closes as soon as there is sufficient manifold vacuum to do so. As the diaphragms get some age on them, the rubber gets stiff making it more difficult for them to pull up and consequently allow the power valve to close. I’m surprised Holley used that design as long as they did as it was problematic in getting to work as designed.
  Lorena, Texas (South of Waco)
|