Guest Anonymous Posted April 10, 2002 Share Posted April 10, 2002 Alright I bought the linkage from MSA that connects the 2 su's together. Got it all hooked up to each carb but when I press the peddle all that moves is the linkage that opens the butterfly. The nozzle/jet (thing where fuel comes in that moves toward the gound) doesnt move at all. Does the nozzle/jet only move when the car is runnning or am I missing some important parts? Please help me i want t drive my car!! Thanks Lance Quote Link to comment Share on other sites More sharing options...
jimzdat Posted April 10, 2002 Share Posted April 10, 2002 You're on the right track--when you open the throttle with the engine not running, the butterflies will open, and thats it--when it's running, the vacuum will cause the pistons to rise, pulling the needle up out of the nozzle to allow fuel flow (to quote Scott Bruning: "a SU carb is nothing but a controlled fuel leak") The only time you should get any movement from the nozzles is when you pull the choke cable--it'll move the nozzle down to richen the mixture a bit--the choke linkage should also bump the butterflies open a little If you havent already-I would seriously consider getting the SU videotape from www.ztherapy.com--I ordered it when I had my carbs redone, and it was the best 15 bucks I ever spent for a tuning tool Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 10, 2002 Share Posted April 10, 2002 Dude you kick ass!!!! Thanks alot!! Got out of school to come and work on the Z Thanks again Lance Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 10, 2002 Share Posted April 10, 2002 Ok next question. On most carbs out there when the vehicle is turned off and you push on the linkage you can see gas squirt out of the jet into the body. On these su's can you tell if that is happening or does it only squirt gas in the body when there is a vacuum on it? Quote Link to comment Share on other sites More sharing options...
jimzdat Posted April 10, 2002 Share Posted April 10, 2002 You'll never see that happen--SU carbs have no accellerator pump--you can pump the throttle all day long, and never flood it. It also does no good to pump the pedal when trying to start it--just pull the choke back and crank it--if anything, put a little pressure on the pedal and hold it, that's about it Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.