I'm pulling this motor soon but this is still a good teaching opportunity because I've clearly messed something up and don't want to repeat this mistake.

My motor bogs under heavy acceleration, to the point where it can be down right temperamental. Let's start from the beginning: Last year I had a new exhaust system put on the car and needed to replace the carb as the q-jet failed in the drive from the mechanic to the muffler shop. My mechanic recommended an edelbrock 1406 and I was under the gun and impulsive and I agreed. I picked up the car and it ran bad *** and sounded BAD ***. Few weeks later I smell gas as it's warming up and when I open the hood and gasoline is spurting out of the outlet tube as the rubber grommet had forced its way out of the viewing tube.

I went and got another inline fuel filter and replaced the failed unit. A few days later the car would bog under hard acceleration, to the point that it motor sounds as though it has cut out and then re-awakens quickly and aggressively (for context I mean it will sound as though it has cutout and then when it comes back online it'll chirp 2nd gear in one press of the pedal)

- Installed a .043 squirter in the carb, moved pump arm to hole nearest the body and added a 3" hg spring (blue). Nothing

-Notes:
*When testing the car it wouldn't bog as bad if the tires could break lose easily (discovered when stomping on it with the tires resting on the white stop sign street paint, which is slick)
*When I went to time the car the timing marks wiggled as at some point the spacers were inaccurately replaced. I've fixed that and can having a timing number soon. Car doesn't struggle to start or crank excessively but what would make it bog? timing to high at idle or timing too low at idle?
*stock distributor, never bogged with q-jet, new plugs/wires/battery/alternator, 87-93 octane used during tests.
* no miss, stumble or hesitation once WOT has "caught up"

Thanks

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Since the only thing changed was the carb. I'd probably look in that direction. One question, does the car downshift when floored?

 

My guess is you're seeing a big gulp of air but not enough gas to fill the air plug.

1) Too small a squirter
2) Too small a pump shot
3) Secondaries flopping open
4) Big vacuum leak
5) Any or all the above combined

That carb should give you instant response being only a 600cfm. Put everything back to stock and try one thing at a time. I would bump the initial timing up until it's hard to start then back it off two degrees also. Check the brake booster to engine vacuum hose and make sure it's not leaking.

 

Yes