Carb help

So I have a edelbrock 650 avs carb. It's on a 350 mild cam.
Problem seems to be too rich. When I mash the throttle it sputters real bad and wants to die. Also when cruising if I step on it, it kicks down a gear and does the same thing. However if I stay on the gas it clears out.
Too rich?
I checked the float, checked timing, dwell, vacuum leaks and also adjusted the acc pump. Plugs look pretty decent, slightly dark. More wet with fuel then black carbon. ****er smells rich too. Idle seems to drop when sitting at a light for awhile.
Picked up the calibration kit, but I don't know where to start. Primary or secondaries.
It's the 1806 carb
thanks

 

have you checked your fuel pressure? checked the float level?

 

Yep, checked both.

 

Anyone? Is the cutting out rich or lean?

 

sure you dont have dirt/**** making metering rod stick open?

out of the box a 650cfm is really too much carb for a 350cid

Holley has an interactive carb cal for CFM and recommends their 570cfm for mild street performance 350cid - Im building a 600 vac sec holley with similar jetting to the avenger and should be just about perfect

Cant find the edelbrock selector but in general I wouldnt go above a 600 performer - Since you have the 650 avs at this point I would lean both primary and secondary but be careful not to go too lean - check plugs for a bit after any adjustments - the owners manual shows pretty in depth calibration schematics

 

From the edelbrock manual

Long Duration Camshaft​

If the engine has a fairly radical camshaft it may require an excessive amount of throttle opening for idle and/or have low idle vacuum levels. Either condition can lead to poor levels of
adjustability and erratic idles.
• Another fix for the above condition is to run as much spark advance as possible at idle. If the distributor is fitted with a vacuum advance unit, connect it directly to manifold
vacuum. If you are not able to employ vacuum advance for some reason, then the mechanical curve should have a low limit, which will allow you to use plenty of initial spark advance.
• Measure the manifold vacuum at idle. If it is below 7" Hg, there is a good chance that the Metering Rods are in the up (rich) position. When combined with a high idle air rate this can
cause the Nozzles to discharge fuel at idle. Use a weaker Step-Up Spring (see section on Step-Up calibration) to keep the Rods down at idle. With some cams, a stiffer spring (pink or​

silver) is necessary. Experimentation is the best way to determine which is best for your application.

 

Check the coil. A weak coil can seem a lot like an over-rich carby.

Cosmo

 

Thanks for the reply's. I tuned in the adjustable secondaries and got a world of difference. Took it out and mashed on it. The only sputter is if I'm at a dead stop and mash to cometely wide open throttle. So from cruising to stoping down a gear is good and off the line good unless I mash down to the floor.
Pulled the plugs and they are perfect!
Anyone use this carb before?
I turned the flat head screw on the secondaries 2 full turns counterclockwise. (increasing spring tension)
is there too much I should turn this ****er?
Edelbrock said from where it's at go 1 full turn then another 3/4 if it didn't help completely.
So I'm at 2 turns from the spring having no tension.
Thanks!
Oh and I don't have the manual for the carb, need to get one

 

Need more pump shot, possibly more timing too.