Author Topic: 17084223 idle bypass air  (Read 204 times)

Offline 65malibu

  • Garage guy
  • **
  • Posts: 9
17084223 idle bypass air
« on: July 06, 2024, 07:18:57 AM »
What is the correct way to size the bypass air? I have control with the mixture screws, but if I pull off the hose to the choke pull-off the idle speeds up, seemingly needing more air. Should I go up in size of the bypass until the idle doesn't increase?

Offline 77cruiser

  • Qjet Hero
  • *****
  • Posts: 616
Re: 17084223 idle bypass air
« Reply #1 on: July 06, 2024, 08:58:54 AM »
No, if it idles & drives good & no nozzle drip I'd leave it.
Jim

Offline quadrajam

  • Carb lover
  • ***
  • Posts: 97
Re: 17084223 idle bypass air
« Reply #2 on: July 07, 2024, 06:49:20 AM »
^X2

Offline Cliff Ruggles

  • Administrator
  • Qjet Hero
  • *****
  • Posts: 5391
Re: 17084223 idle bypass air
« Reply #3 on: July 08, 2024, 01:19:27 AM »
Pulling off a small vacuum hose should increase engine speed.  Lower the idle speed back down and re-adjust the idle mixture screws, if needed, and see if it improves sensitivity with them and no nozzle drip.  In most cases no need to add more bypass air if you don't have nozzle drip and full control with the mixture screws, but every application is slightly different and there are times when adding a little bit more helps.....

Offline 65malibu

  • Garage guy
  • **
  • Posts: 9
Re: 17084223 idle bypass air
« Reply #4 on: July 08, 2024, 07:53:31 AM »
So, readjust the mixture screws and idle with the small vacuum hose off? Wouldn't it be rich when I put the hose back on?