Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Set up questions

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F250 Restorer:
Hello everyone.  This is my first post.  I am working on a little project:  installing a Q.jet on my hp FORD 300 I6, with about 250 hp.  The engine is .030 over, balanced, Isky 256 cam, Chrome rings, p&p head with over size sbc valves, shaved head and block= 9.3 c.r., header, Offenhauser 4v intake.

I currently have a Edelbrock 1403 (500 cfm) carb, but am unhappy with mpg and performance.  So I pulled a Q.J. off a 78 chevy van with a s.b.  It is a Cal. carb, for an auto trans. I got the kit from Cliff, with new idle tubes and air  bleeds to richen up the a/f.

Due to a thumb injury I have some time to think over the carb details, and was wondering where I should set the float.  I did not run the numbers of the engine I took it off.

Also, does anyone know if the mix screws in Cliff's kit need to have one coil cut off as he recommends in the  book, or should I install as is?

Thank you in advance.  I'm sure I'll find lots of great info here to prepare for the set up.

omaha:
     The float is usually set at 1/4 inch and that seems to work. Some like to set it lower. I really dont know too many that revert to float settings as a tuning tool but some will argue that 1/4 is too high. Alright, if it makes you happy, try 9/32nds or even 5/16. I really dont see how this will affect anything too much. But, if you happened to loose the factory specs for some reason, (like I loose everything) the default setting at least for me is 1/4. I guess you could effect mixture but do you have a tool accurate enough to detect it? Over a wide range? Usually not.
    As far as the needles go, they should be able to seat to shut off the fuel or close to it.So, if the needles do not close the port all the way, because the springs coil bind first, yes trim a coil. If they do close the  port without the spring coil binding, they are fine. This has alot to do with the size of the idle port size (how big you may have drilled them). Anyway, welcome to the forum. HAVE FUN & ENJOY!!
(cool project BTW)

F250 Restorer:
I'm just trying to make sure I installed the air bleeds restrictions in the correct location.  Pls let me know.

omaha:
   Looks like you got it. Main air bleeds in both the top and main castings.

F250 Restorer:
Thanks for the help, guys.  Since I have put the carb together, I notice I have an issue with the secondaries.  They bind just slightly at opening.  However, if I push in the s. shaft, on the spring side, they are free.

I did have a time getting the springs to work correctly, and now the shaft seems to move from side to side.  Any advice? 

Thanks in advance.

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