Has anyone tried these carbs out? https://www.edelbrock.com/avs2-carburetors
They sound pretty sweet! My carb is pretty old now and I don’t trust myself rebuilding one. Also, the previous owner had a 650cfm 1806 on a performer intake w/stock rebuilt 289 block/heads. So I was thinking about getting a 500 cfm AVS2.
any thoughts?
I love the 500 CFM part, not the Edelbrock part. They try, but Edelbrock carb stuff is not my cup of beverage. Re-vitalized Carter design; I like Autolite or Holley for our Fords.
Alright I was thinking about grabbing a 4100 autolite, but looking for a more plug and play rather than rebuild option. Although I have heard the autolites are pretty simple to rebuild. Do they make solid reproduction autolites? Or would it be good to find an old one rebuilt.
Also what do you not like about edelbrock? from what I hear they are tricky to get tuned but are pretty reliable. My brother is not a fan of Holley claiming they are unreliable. Which is why I was thinking a replacement edelbrock.
The old 1850 600 vacuum secondary is most common carb out there used on SB fords.Very forgiving and all around great carb. It’s much easier to tune than the old Carter design. Tuning parts are available just about anywhere as well for Holley. Ford liked them so well my car had two of them right off the assembly line!
-Keith
I’ve heard nothing but good things about the Edelbrock 1403. With your engine I wouldn’t put anything on there over a 500cfm. The lower cfm carbs will gain you low end torque and gas mileage over say a 600cfm carb. You might loose 6-7hp on the top end, but who cares.
Summit M-series carbs absolutely wreck the AVS2 in every department. For a stock motor, the 500 cfm version is fine, but with even mild mods, I’d probably go 600CFM, because you’d get a little less pressure drop and a little more top end out of it at WOT. The annular boosters ensure excellent fuel vaporization, which means a really clean burn, smooth idle, part-throttle,and throttle response that’s every bit as good as your average fuel injection setup. The M2’s are also inexpensive, at about $300. They’re a descendant of the old 4100 Autolite, but they use common Holley jets and parts. They are incredibly friendly to tune, as well.
All in all, these carbs are flat-out superior to anything else you’d find for under about $600.
My old Edelbrock carb on my last cougar was the one reliable part on the car. The only thing you might have to do is to put the accelerator pump shaft for a longer stroke.
If you really want to be a total snob, you can get the spring kit that goes with the needle valves to really dial it in for fuel economy. (Totally unnecessary 99% of the time)
The Holley carb I have now barely even runs with it cold and has that part throttle hesitation that is practically unfixable by mere mortals. It has vacuum secondaries and is no doubt far to large for the engine. It has one of those non-electric auto chokes that basically never actually opens up.
Also, I would strongly suggest a manual choke, never had any luck with any auto choke ever. Yes, it got home from Iowa coyote classics to Texas to see a lady friend and then go Baltimore without incident, but despite the engine being totally rebuilt, I was always annoyed.
Which Holley do you have?
List-9834-0847, doesn’t say anywhere what the cfm is.
That one is 60o CFM. Vacuum secondary, electric choke.
There’s a tube going to the choke from the exhaust manifold & the car has no wiring for an electric choke.
I finally did get the hot air choke to work, but the part throttle response is still terrible.
I ordered and received an Edelbrock 500 cfm AVS2 with a manual choke. I ordered the electric conversion kit so that if I hate it I can go manual.
Since I’ve heard that you can literally tune the electric choke on a kitchen table with a battery charger and 2 wires, I feel better about it. Those wires will also go into my freezer and it’ll still close.
My plan is to get it right before even taking it outside to put on the vehicle.