- Joined
- Jan 20, 2011
- Messages
- 893
With the problem of Amal Needle Jets tending to wear somewhat faster than other brands of Carburetor,
I am wondering if any Forum members have ever considered making up some kind of a simple test to measure
the flow rate of a Needle Jet.
I am picturing some sort of funnel with a Jet screwed in the bottom and a measured amount being timed.
I do understand that a worn Jet is next to useless in that it is most likely out of round, but a simple test would be
handy for use on new Jets when a matching pair are required. Say for racing with non standard fuels.
The reason I bring this up is....
I am having great trouble tuning a friends Amals for Mid range performance, and he cannot be convinced to
try another brand of carbs. That's OK as I have enjoyed the challenge, so far.
I have allways used number drills for Main and Needle jet tuning when Methanol was involved, and have even sat down with
a piece of emery paper on Needles and Slides, but that was on motors that ran at pretty much full throttle most of the time and very
little half throttle. This is a Classic Roadrace Outfit and some mid range would be helpfull. lol.
Any thoughts.?
Edit.. I just had a thought, is there a math formula re the size of hole etc.?
I am wondering if any Forum members have ever considered making up some kind of a simple test to measure
the flow rate of a Needle Jet.
I am picturing some sort of funnel with a Jet screwed in the bottom and a measured amount being timed.
I do understand that a worn Jet is next to useless in that it is most likely out of round, but a simple test would be
handy for use on new Jets when a matching pair are required. Say for racing with non standard fuels.
The reason I bring this up is....
I am having great trouble tuning a friends Amals for Mid range performance, and he cannot be convinced to
try another brand of carbs. That's OK as I have enjoyed the challenge, so far.
I have allways used number drills for Main and Needle jet tuning when Methanol was involved, and have even sat down with
a piece of emery paper on Needles and Slides, but that was on motors that ran at pretty much full throttle most of the time and very
little half throttle. This is a Classic Roadrace Outfit and some mid range would be helpfull. lol.
Any thoughts.?
Edit.. I just had a thought, is there a math formula re the size of hole etc.?