240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

Weber Carbs!!

Old 11-24-2007, 04:10 PM
  #1  
Mr. Fancy Connectors
Thread Starter
 
Join Date: Nov 2007
Location: Boise, Idaho
Posts: 648
Weber Carbs!!

How does one go about tuning the dual weber carbs? I got my rear end done and now I need to get my carbs tuned in and get it ready for driving.

I can`t wait, I feel like a schoolgirl.
Mhinrichs is offline  
Old 11-24-2007, 04:22 PM
  #2  
The Good Twin
 
NismoPick's Avatar
 
Join Date: Aug 2005
Location: Wild Wild West, UTAH!
Posts: 20,616
NismoPick is offline  
Old 12-06-2007, 12:28 PM
  #3  
Mr. Fancy Connectors
Thread Starter
 
Join Date: Nov 2007
Location: Boise, Idaho
Posts: 648
So I am trying to tune in my Z and having a hell of a time. It idles really rough but I finally got it idling. Now I need an answer, Do these carbs run as standalone or is one a primary and the other a secondary? When it idling I got fuel into one and none in the other, when I give it throttle fuel into both and it runs like a raped ape. I am really confused.
Mhinrichs is offline  
Old 12-06-2007, 12:59 PM
  #4  
Mr. Fancy Connectors
Thread Starter
 
Join Date: Nov 2007
Location: Boise, Idaho
Posts: 648
Nevermind guys, I was frustrated and didnt take the time to see the 2 manifolds. I got it going now. My number 2 carb, the closest to the firewall, had the idle screw run all the way in. So after running that out some, a few minor cable adjustments and a little bit of fine tuning it sounds pretty, well as pretty as something without exhaust can sound. I`ll be test driving it as soon as The neighbor is home to move his jeep and I`ll let you know how it runs.

I must say it is a unique experience trying to tune by ear a car that runs two carbs, you kinda gotta listen to two sets of pistons. I love this car.
Mhinrichs is offline  
Old 12-06-2007, 01:07 PM
  #5  
I have a present for you...
 
theramz's Avatar
 
Join Date: Mar 2003
Location: dayton, nevada usa
Posts: 1,661
If I remember right the down draft webers each have a primary and secondary. Anyway, first you have to get an air flow balance. You can do this with an air flow meter or take the play out of the linkage so both carbs start to open at the same time (engine off). Then you can dial in the idle jets by cloing one down until it starts to stall and back off 1/4 turn. Do the same for the other. Repeat this untill it runs smooth. If that doesn't help you may have to rebuild them.
theramz is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
prowrench
For Sale (VIEW ALL)
0
03-26-2007 12:23 PM
malikot
240Z, 260Z, 280Z Performance / Technical
6
11-19-2006 06:06 PM
fairladyz
For Sale (VIEW ALL)
0
07-12-2003 10:58 AM
Airpilot16
240Z, 260Z, 280Z (S30) Forums
3
06-18-2003 08:55 AM
ZLishous
240Z, 260Z, 280Z (S30) Forums
8
05-28-2002 01:30 AM


Thread Tools
Search this Thread
Quick Reply: Weber Carbs!!


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.