Edelbrock carb help

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my Carter factory books say that the spring on acc pump is tuned. so that under mid peddle pressure it gives the most amount of fuel. and under hard pressure not as much. cause under hard pressure the vacuum jumps fast enough so not as much fuel is needed. but all is this based, IMHO, on stock engine stock carb tuned by the car maker. IMHO, for street driving , mild engine keep things close to stock. just my idea.
 
Most people put the pump shot linkage into the closest hole to the carb body and call it correct. Never mind those mental midgets and realize that it is a good spot to start. It maybe possible to move the arm back a hole or two. It all depends on your engines need on the pump shot. There is NO sense using the most when you can use less and more than likely gain a better throttle response and accelerate quicker.

Stock positions on the factory carb pump shot arm vary.
Step up springs for the rods are equal to the Holley power valve.
 
Excellent point. Remember too, that linkage rods were made to be bent. Subtle changes in the rod angle can help fine tune the pump shot even further.


rumblefish360 said:
Most people put the pump shot linkage into the closest hole to the carb body and call it correct. Never mind those mental midgets and realize that it is a good spot to start. It maybe possible to move the arm back a hole or two. It all depends on your engines need on the pump shot. There is NO sense using the most when you can use less and more than likely gain a better throttle response and accelerate quicker.

Stock positions on the factory carb pump shot arm vary.
Step up springs for the rods are equal to the Holley power valve.
Click to expand...
 
YES! Something I didn't mention. The rod must be re bent to adjust the height of the pumpshots plunger height. Failure to do so can result in ether a pump shot bottoming out or not traveling far enough in which in both cases, the pump shot plunger is not pushing the correct amount of fuel into the engine. There is a measurement, I just do not remember off hand.
If it is to high, the shot can be delayed. And not all of the shot delivered.
If it is to low, the full volume of fuel is never under the plunger to be delivered.

And to think people adjust the rod on the lever but never anything else and then point to it being in the wrong hole.

On my Fed/Mog AFB on my stock 360, I went to the middle hole, adjusted the height, ahhhh, sweet runner.
 
Only bend the linkage rods though, not the metering rods!!!!

Don't confuse the two...
 
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