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Author Topic: Idle Bypass air size measurement location  (Read 671 times)

Offline GSP7

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Idle Bypass air size measurement location
« on: January 25, 2025, 11:39:44 AM »
Where/ What location,  do you measure the Idle Bypass Air hole/passage ?

Page 94,95,96 shows several different sizes options from : none -.050- .080- .085- .106- .110 inch


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Offline Kenth

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Re: Idle Bypass air size measurement location
« Reply #1 on: January 26, 2025, 02:45:57 AM »
There are pictures and explanations on pages 29-30.
Measurements are taken in the throttle plate or blade holes.
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Offline GSP7

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Re: Idle Bypass air size measurement location
« Reply #2 on: January 26, 2025, 08:41:26 AM »
Yep, that's where I measured . .106" stock hole 1980 carb , and .092" on a 1971 carb

Maybe those none, .050", .080" etc on page 94, 95 came from older 1960s carbs
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Offline Kenth

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Re: Idle Bypass air size measurement location
« Reply #3 on: January 26, 2025, 09:32:15 AM »
Not necessarily. The numbers you see on these pages are examples of possible recipes depending on the application, not examples of by-pass on factory units.
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