Carb question

Between Holley 600 CFM and Eddie Thunder series 650 CFM AVS carb which gives the best street performance?

I find it easier to tune the Holley carbs over the AVS carb.
Second reason I don't care to much for the AVS carbs is try to read the part no. on a metering rod, dam near impossible even with a magnifying glass.

In general, the Holley has always been a performance based carburetor, The tunning ability is great and can fine tune some of the smallest holes you can have due to other miss matched parts.

I had a 1406 EDDY carb on my vette, 350 hp 390 tq 350. It was a nightmare to try to get a stumble out of? i removed it put on a holley 670 avenger, re jetted and played with secondary oppening spring and i am very close. I need to get ris of the 3.08 gears, i have a new set of 3.55 gears for it so i will have to change that spring again, but at least it will be doable.

First off,we are going in the wrong direction on the topic.Fist we need to know what you are doing with the car,motor,rpm,cam,gears,driving habits,etc to pick a proper carb and CFM rating to best suit your needs.Holley,s can be a pain in the ass to tune if you never done one before,and so can a carter,or Thermoquad,or a Rodchester.If you spend time reading about them,working on them,it becomes second nature.Lets say you have a 360 and like to bring it up to 6000rpm on a open road to just clean it out,every so often,well we are looking at 750 vacuum secondary if it,s a auto car,if it,s a stick,you will go to a 750/800manual secondarys.So if you want the right carb,make and post a list of all the needs and parts you have in the car,and I can tell you the best choise,mrmopartech

years ago with I had a stock 360 in my aspen, I switched to a 750 holley from a 750 eddie. picked up big time with the holley. ET was 14.8 with eddie, 14.3 with holley. I did no other changes then the carb switch.

Holley

If your combination is stock, then a factory style carb works great. Once you change the cam intake headers and change timing, the signal to the carb changes, and in most cases a factory style carb wont cut it. This is where the holley takes over. Its all in what your doing with the car.

I've have various carbs over the years but currently have this one on my 451.
99% street motor
http://www.quickfueltechnology.com/carburetors-q-series/q-series-carburetor-850cfm-drag-an.html

This hands down the best carb I've ever owned. Infinitely adjustable, every orifice that flows air or fuel is adjustable.   Proform is another good choice.

Expensive buggers aren't they?...but they look good.

My buddy just bought a QF 750 for his Fairlane, he gave me his old holley 4779 dbl pumper. I put a kit into it and turned it into a 4 corner idle carb. so its nice to have an old school spare sitting in the cupboard.

We use a Street Demon on the modified 318 truck and like it very much.

http://www.demoncarbs.com/1900.asp