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Quote from: Martin6 on January 19, 2024, 12:38:25 PMThank you, ordered the Sealey version, to hook on the rafters. 👍You might need to watch the header tank height as too high might cause the float valves to leak.
Thank you, ordered the Sealey version, to hook on the rafters. 👍
Quote from: McCabe-Thiele (Ted) on January 19, 2024, 02:00:20 PMQuote from: Martin6 on January 19, 2024, 12:38:25 PMThank you, ordered the Sealey version, to hook on the rafters. 👍You might need to watch the header tank height as too high might cause the float valves to leak.That I feel is a fallacy Ted, if it seals it seals, look at the video of that wreck that Johnny started up the other day, tank is very high in the rafters and that didn't leak, and they were PD carbs as well, known for causing problems. Sure pressure can cause problems but what weighs more, 3 gallons a few inches above or 1 pint a few feet above?
Typically mc fuel pumps delivers 3psi. Float valves are generally overcome at approx 4.5 / 5psi. 1ft head of water gives 0.433psi do the maths. One thing many don't think of is that in use float valves open very tiny amounts so the smallest of debris is likely to stay in the valve and never be flushed through unless the carb is drained or stripped and cleaned properly. Anyone wanting to check simply put a airline with a pressure reg on a upside down carb on the carb inlet and see at what point the valve leaks air when using leak detector spray.
Quote from: Moorey on January 20, 2024, 10:04:31 AM Typically mc fuel pumps delivers 3psi. Float valves are generally overcome at approx 4.5 / 5psi. 1ft head of water gives 0.433psi do the maths. One thing many don't think of is that in use float valves open very tiny amounts so the smallest of debris is likely to stay in the valve and never be flushed through unless the carb is drained or stripped and cleaned properly. Anyone wanting to check simply put a airline with a pressure reg on a upside down carb on the carb inlet and see at what point the valve leaks air when using leak detector spray. Isn't that accumulated figure 0.433 psi going downward under sea level ? Usually at one atmosphere for each 10.06 mtrs (33ft) effectively the accumulation of the ocean above you.In air, and by lifting 1 ltr, then its nothing like that surely. I'd doubt much difference between a tank say at 20 ltr sitting just above the carbs, in comparison to 1 ltr at 6 ft higher.