« previous next »
Pages: [1]   Go Down

Author Topic: idle mixture  (Read 3056 times)

Offline markzepp820

  • Registered Users
  • *
  • Posts: 128
idle mixture
« on: March 28, 2006, 05:44:00 PM »
how many turns out is it for a carter quadrajet in a 79' C20 350, th400? And it is stock. thanks

Logged

Offline Lt.Del

  • Andy aka:SgtDel
  • Senior Member
  • ****
  • Posts: 3864
  • DelbridgePhotography.com
    • www.delbridge.net
idle mixture
« Reply #1 on: March 28, 2006, 05:58:00 PM »
Turn it 2 1/2 turns from all the way in.  This will give you a good starting place and, in my case, was exactly where it supposed to be.

SgtDel

George Mason - Final Four
GMU '90

Logged

Offline Z28 c10

  • Registered Users
  • *
  • Posts: 174
Re: idle mixture
« Reply #2 on: March 28, 2006, 07:25:00 PM »
two and a half turns is a good starting point as the Sarge said, but to make sure, bring the engine up to operating temp, disconnect the vacuum advance and plug the vac source, adjust slowly in till you get the highest idle RPM. If the idle doesn't come up then bring her out till you get the highest idle. Don't go beyond your high idle point, after it's where it needs to be, reconnect the vac advance and idle it back down to 800 revs I believe. From there your set and ready to roll.

 JayTater

 Z28 C10

Logged

Offline 1976Scottsdale

  • Junior Member
  • ***
  • Posts: 760
Re: idle mixture
« Reply #3 on: March 28, 2006, 09:08:00 PM »
Is this the same for Edelbrock Performer carbs?  Mine keeps dying in the morning.  It dies twice, always, then it runs fine.  I know the vaccuum advance is not working.

Logged

Offline Z28 c10

  • Registered Users
  • *
  • Posts: 174
Re: idle mixture
« Reply #4 on: March 30, 2006, 08:57:00 PM »
I'm running an Edelbrock on my 350 and have never had any real issues with it. Check the mixture setting on the choke spring cover( I can't remember the right name for it ). You can turn it clockwise to richen choke mixture or counterclockwise to lean the choke mixture.

  JayTater

  Z28 C10  

Logged

Offline DnStClr

  • Senior Member
  • ****
  • Posts: 1809
Re: idle mixture
« Reply #5 on: April 01, 2006, 09:14:00 AM »
Are you sure about that? I think you may have it backwards. As you turn the adjusting screws out, it richens the fuel mix. Turning them in leans it .

Logged
Don
87 Chevy Silverado

Offline markzepp820

  • Registered Users
  • *
  • Posts: 128
mixture
« Reply #6 on: April 03, 2006, 08:35:00 PM »
DnStClr is correct on that one

Logged

Offline Z28 c10

  • Registered Users
  • *
  • Posts: 174
Re: mixture
« Reply #7 on: April 03, 2006, 08:40:00 PM »
Talkin about the choke spring cover there guys, not the mixture screws. The cover has dash marks on it going from lean one side to rich on the other. At least thats the way my Edelbrock is.

 JayTater

 Z28 C10

Logged

Offline DnStClr

  • Senior Member
  • ****
  • Posts: 1809
Re: mixture
« Reply #8 on: April 03, 2006, 10:07:00 PM »
OOPs, my bad. Thanks for the correction, Tater. I WAS indeed thinkin about the idle mixture screws.

Edited by: DnStClr at: 4/3/06 9:11 pm
Logged
Don
87 Chevy Silverado
Pages: [1]   Go Up
« previous next »