[hickey's got a yami]

i got a 600 edelbrock on a "rebult" 305. when i hit the throtle it bogs. after the bog its crazy. i got the timing good, but the 2 screws on the carb got me stumped. one is gas, one is air. dont know the diffrence. i started them at 1.5 turns each and i went in and out to try to tune it. no luck still blows light black smoke at an idle and bogs.


it starts good too.


can anyone help me???

[Arrowhead]

Actually, both screws are fuel. Turn in for lean and out for rich. I'm in the process of tuning one I just installed as well. The Edlebrock websirte has good instuctions on how to set it up.

http://www.edelbrock.com/automotive_...ers_manual.pdf

[hickey's got a yami]

thank you i thought they were diffrent.

[10mikeymike]

I've been working with Edelbrock on similar issues lately. A good starting point is to move the linkage on the accelerator pump to the top hole. That will give you a stronger stream of fuel when you step on the gas. The next step if that doesn't help is to change the step-up springs to allow the metering rods to open at higher vacum (lower engine speeds). If this doesn't help, call Edelbrock. They are good to work with and should be able to help you through this problem.

[red65mustang]

there's a trouble shooting graph toward the end (page 20 something) of the complete manual link arrowhead posted that addresses your symptom...

[ScoTFrenzel]

Originally Posted by hickey's got a yami

i got a 600 edelbrock on a "rebult" 305. when i hit the throtle it bogs. after the bog its crazy. i got the timing good, but the 2 screws on the carb got me stumped. one is gas, one is air. dont know the diffrence. i started them at 1.5 turns each and i went in and out to try to tune it. no luck still blows light black smoke at an idle and bogs.


it starts good too.


can anyone help me???

Check the float levels first. Black smoke at idle indicates that it is NOT jetting. Until you get the floats correct, you are just chasing your tail.

You should also be running about 15* idle timing without the vacuum can hooked up, and then have your vacuum can plugged into direct manifold vacuum. That might help your idle too.

Both idle screws at 2 should be real close to ideal if your floats are correct.