carb adjustment

hi, i just installed a holley 2 barrel (used) which i rebuilt , can anyone tell me where to initinally set the air/fuel mixture screws at, i set them at what the previous settings were 1-1/2 out but now as was with the motorcraft carb is really cold blooded can't drive it yet as i'm putting power brakes on it, isn't quite complete (no money) have to keep choke on (manual) half to keep running for at least 15 min. at 80% temp unless i turn idle screw way up , motor is rebuilt 72 304 and had this same problem before rebuild carb came off a 304 any thoughts or sollutions whould be greatly app. thanks also do i turn the screws in or out for more fuel.

 

out typically gives more fuel. still running points ignition?

 

Choke is to increase fuel amount through the carb. The richer ratio created by the choke can mask several problems such as vacuum leaks, low pressure from the fuel pump and insufficient fuel pump volume. Partially plugged filter, collapsed or restricted fuel lines, etc. Have you ever had this engine running good?

 

The external mixture screws only control idle mixture. If you want to change performance at any setting except hot idle, you will need to change other parts of the carburetor.

Check for vacuum leaks, as mentioned.

You can't just plop a carburetor from another application on and expect it to run right.

I suggest you buy a book about Holleys and read up on how to tune them. http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=aps&field-keywords=tuning holley carburetors

 

about the points , iv'e changed over to hei as for the vacume iv'e checked and no leaks runs the save as before the engine rebuild and the carb change

 

timing all set? sounds like the carb is too lean open the idle screws a half turn at a time and see if it gets better...and as tim said do a little research...http://www.ehow.com/how_6805217_adjust-two_barrel-holley-carburetor.html

 

The holley web site has step by step tuning procedures