vacuum gauge and carb tuning

BTW if you find the car runs better with the choke partly closed...
the (choke) is used to temporarily richen the f/a ratio, making the engine easier to start on cold conditions, restricting the flow rates , with the choke, typically increases the vacuum signal the venturies see and richens the effective f/a mixture ratio, as it tends to draw more fuel. if your running better with the choke partly closed richening the jets usually tends to solve that.
now obviously the type of jetting and the float settings, adding differant boosters, discharge nozzels,fuel pressure levels, accellerator pump settings,the type of carb, engine size, cam timing or other factors might come into this in some applications



http://www.2carpros.com/how_does_it_work/choke.htm
"Carburetor Choke Operation
A choke is used in conjunction with a carburetor. It is a valve that opens and closes and used to restrict air flow. The restriction enriches the fuel/air mixture to aid in the initial startup of the vehicle. The choke creates a stronger vacuum to pull more fuel from the jets and into the air/fuel mixture. When the engine warms up the choke slowly releases and stays in the wide open position."


choke_closed.jpg



http://www.carcraft.com/techarticles/116_0508_carburetor_showdown/index.html

116_0508_boost05_z.jpg

IVE ("wasted" A ton OF CASH GAINING A GREAT DEAL OF EXPERIANCE)
I guess I would not know 1/100th of what I know without having done that though!:rofl:
 
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