which Carb???
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Joined: Oct 2005
Posts: 83
Likes: 0
From: Gummersbach/Germany NRW
which Carb???
Hey guys, I have a '71 4-speed convertible and unfortunately, not the original motor. Now it has a ZZ3 with an Edelbrock 600cfm 1406 on it. It stutters while cruising and when I accelerate it chokes a bit and then I get the power. My only experience with carburetors is with my Cobra. I had a Holley 600cfm and replaced it with a Demon 650cfm. The performance gain (acceleration) was exceptional. Would it be better to rebuild the Edelbrock or go with a Demon? Let me know what you guys think!
Wayne
PS. Let’s assume the timing, plugs, pumps and so on are in correct working condition!
Wayne
PS. Let’s assume the timing, plugs, pumps and so on are in correct working condition!
Racer
Joined: Apr 2006
Posts: 477
Likes: 43
From: Millbrae California
a 600 cfm performer or 650 cfm thunder from edelbrock are good carbs when tuned properly for the engine, thier main weak spot is fuel starvation on high G-force cornering because of the jet placement.
i never use a edelbrock (afb or avs style) larger than the 600-650 cfmbecause of a lean off idle problem that is built into them.
i like the Mighty Demons for a high performance engine or a q-jet is also a good choice once tuned for the engine.
i never use a edelbrock (afb or avs style) larger than the 600-650 cfmbecause of a lean off idle problem that is built into them.
i like the Mighty Demons for a high performance engine or a q-jet is also a good choice once tuned for the engine.
Safety Car
Joined: Feb 2006
Posts: 4,855
Likes: 2
From: Columbia South Carolina
Originally Posted by wayne64
Hey guys, I have a '71 4-speed convertible and unfortunately, not the original motor. Now it has a ZZ3 with an Edelbrock 600cfm 1406 on it. It stutters while cruising and when I accelerate it chokes a bit and then I get the power. My only experience with carburetors is with my Cobra. I had a Holley 600cfm and replaced it with a Demon 650cfm. The performance gain (acceleration) was exceptional. Would it be better to rebuild the Edelbrock or go with a Demon? Let me know what you guys think!
Wayne
PS. Let’s assume the timing, plugs, pumps and so on are in correct working condition!
Wayne
PS. Let’s assume the timing, plugs, pumps and so on are in correct working condition!
Make sure it is jetted for your elevation, I have had three and always have been able to get them running great with a strip kit. also, look in the owners manual for the pfoper step up springs to use (also in the strip kit). a few jsts and rods will much less expensive than a Demon and you will have the experience of tuning Edelbrocks.
Burning Brakes
Joined: Apr 2000
Posts: 1,145
Likes: 1
I have a perfect condition Speed Demon 750, like new in box if you are interested. Runs WAY better than the edlebrock carbs!
electric choke, vacuum secondary
$300 shipped
ccherri@yahoo.com
electric choke, vacuum secondary
$300 shipped
ccherri@yahoo.com
