Edelbrock AVS2 stalls a bit with initial pedal
Thread Starter
Burning Brakes
Joined: Apr 2017
Posts: 877
Likes: 80
From: Frederick MD
Edelbrock AVS2 stalls a bit with initial pedal
Good Evening All,
Not sure if this is the best place for this post, let me know if it should go somewhere else. I put an Edelbrock re-manufactured AVS2 1906 Carburetor electric choke in my NOM '64 since the old holly was in need of a rebuild and I did not feel like it. I also swapped out the original intake and put an HEI on it. It runs pretty good but there is a fair amount of hesitation when you initially give it pedal. So if for example I am coasting with no pedal in 4th and then give it gas it will hesitate for a bit and then once the RPM comes up a bit it will perform fine. It seems it has to be something with that accelerator pump, does that sound right? Has anybody adjusted one of these that can give me something to try?
Thanks,
Scott
Not sure if this is the best place for this post, let me know if it should go somewhere else. I put an Edelbrock re-manufactured AVS2 1906 Carburetor electric choke in my NOM '64 since the old holly was in need of a rebuild and I did not feel like it. I also swapped out the original intake and put an HEI on it. It runs pretty good but there is a fair amount of hesitation when you initially give it pedal. So if for example I am coasting with no pedal in 4th and then give it gas it will hesitate for a bit and then once the RPM comes up a bit it will perform fine. It seems it has to be something with that accelerator pump, does that sound right? Has anybody adjusted one of these that can give me something to try?
Thanks,
Scott
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
They are calibrated a hair on the lean side. May need to enrichen it. Summit sells the kits
First...doyou have the proper curve on your dist? not enoguh advance can do the same thing.
First...doyou have the proper curve on your dist? not enoguh advance can do the same thing.
Thread Starter
Burning Brakes
Joined: Apr 2017
Posts: 877
Likes: 80
From: Frederick MD
Scott
Melting Slicks
Joined: Oct 2012
Posts: 2,156
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From: Dunedin NZ.
Obviously plenty to do then
When you get back to the timing, confirm what you have "all in" i.e. above 3000 RPM with the vac disconnected you should be shooting for 34 - 36 deg. With the vac connected and no load on the engine this can run up to 50 deg. Don't worry about that unless there is any pinging under load. As the engine is loaded up the vac can retards the timing to what it will be with no vac can. You want the vac advance because it will make the engine run more efficiently under low load conditions.
When you get back to the timing, confirm what you have "all in" i.e. above 3000 RPM with the vac disconnected you should be shooting for 34 - 36 deg. With the vac connected and no load on the engine this can run up to 50 deg. Don't worry about that unless there is any pinging under load. As the engine is loaded up the vac can retards the timing to what it will be with no vac can. You want the vac advance because it will make the engine run more efficiently under low load conditions.
Thread Starter
Burning Brakes
Joined: Apr 2017
Posts: 877
Likes: 80
From: Frederick MD
Obviously plenty to do then When you get back to the timing, confirm what you have "all in" i.e. above 3000 RPM with the vac disconnected you should be shooting for 34 - 36 deg. With the vac connected and no load on the engine this can run up to 50 deg. Don't worry about that unless there is any pinging under load. As the engine is loaded up the vac can retards the timing to what it will be with no vac can. You want the vac advance because it will make the engine run more efficiently under low load conditions.
When you get back to the timing, confirm what you have "all in" i.e. above 3000 RPM with the vac disconnected you should be shooting for 34 - 36 deg. With the vac connected and no load on the engine this can run up to 50 deg. Don't worry about that unless there is any pinging under load. As the engine is loaded up the vac can retards the timing to what it will be with no vac can. You want the vac advance because it will make the engine run more efficiently under low load conditions.Scott
