Edelbrock Thunder Series AVS Carb

I've had good luck with mine. With the exception of adjustable secondaries, it doesn't seem to be much different than the old models. The adjustability aids in tuning out lean spots from early secondary opening. Something people used to drill holes to accomplish this on the old carbs.

I wouldn't bother with the electric choke. It's just a pain. I wish I hadn't got the electric choke model.

At first, I had a bad bog. I had to put stiffer springs, advance the initial timing, and put larger dia. accelerator squirters in to completely cure it. Since then, it's been great.

I don't know about those guys who have thier carbs run perfect out of the box. Carbs take tuning, end of story.

Otherwise, its just like the old edelbrock performers. Easy to tune, simple Carter based system.

What it boils down to is,... if you are familiar with and like the Carter carb, then the AVS is the way to go.

Volvord has created an extensive chart for Edelbrock tuning. It'll save you a pile in rods. The Edelbrock charts are kinda vague and designed to get you to buy more parts.

DON'T BUY THE 50$ TUNING KIT!!!!!

http://www.telusplanet.net/public/gilesij/Volvord/carb_jet.htm

Do, however, buy the 5 pack of air horn gaskets, they go silly after a few jet changes. Nothing more irritating than a vacuum leak.

How many Edelbrock carbs do you see in winner circles ? They aren't BAD carbs. They do work. But have some irritating issues like the secondaries. They are 100 bucks more (compared to double pumpers, and more when compareed to vacuum secondaries)when in reality they should be 100 cheaper. You can even adjust the fuel curve on a holley.

10secgoal said:

They do work. But have some irritating issues like the secondaries. They are 100 bucks more (compared to double pumpers, and more when compareed to vacuum secondaries)when in reality they should be 100 cheaper. You can even adjust the fuel curve on a holley.

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I agree, the only reason i went with an Edelbrock the second time was to stick with what I know.

Whaddya mean by 'fuel curve?'

The mechanical secondaries can be a real pain. Looking back, a 600cfm vacuum secondary Holley would have been fine.

Don't believe the hype, no matter what carb it is, you'll eventually have to tune it. Unless you live in 70 degree weather, year round, at sea level. Then you're golden.

The Holley's and Edelbrock's are different. Choose your poison and get used to it. Or convert to fuel injection, then you just plug the computer in and replace parts.

If you didn't have to mess with it, it would be a vanilla Toyota!

Just because a car doesn't stumble, doesn't mean the AFR is correct. You can change little parts in a holley called air bleeds. This will lean out, or richen your car at certain RPM. If it's a big motor, the fuel curve tend to get richer as the rpm range moves up. On HP's and newer holley based carbs you can just unscrew them. The older like I have, it takes about an hour to drill and tap them. Then they are interchangable. Somethimes you will see a car dyno's fuel curve on the chart. then you'll have a better understanding of what I mean.

fair enough. Thanks.