Re: Carter AVS tuning problem
[Re: MOPAULY]
#1454754
06/18/13 11:08 AM
06/18/13 11:08 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I'd leave the top on as the floats are OK. Wait for someone who knows that system
live every 24 hour block of time like it's your last day on earth
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Re: Carter AVS tuning problem
[Re: MOPAULY]
#1454758
06/18/13 12:12 PM
06/18/13 12:12 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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That is surprising that it is way rich at idle since it was an emissions carb. If the main metering is lean you can convert to the Eddy 2 step rods/shorter pri jets. go a couple of tho richer than whats in there now for a start at least on the "cruise" step & fill the domed metering rod caps with JB weld then cover it with scotch tape then turn it over so the JB will settle flat/even on the tape & let it setup like that for several days
live every 24 hour block of time like it's your last day on earth
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Re: Carter AVS tuning problem
[Re: MOPAULY]
#1454759
06/18/13 12:32 PM
06/18/13 12:32 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
I did read up on that a bit, I guess part of an emissions control they were trying to do. I wonder if it's worth messing with beyond this point or just replacing it with something newer. I plan to drive the car quite a bit once it's road ready and the rich idle is pretty obnoxious.
This reminds me of a recent tuneup I gave my car. 600 1405 edlebrock carb on a 340 with a 474 cam.
I got the vacuum gauge and timing light out. I didn't change my timing, 24 initial and 35 total plus vacuum advance.
What I did windup doing is open my idle mixture screws a little and that helped my idle. But also what I think it did was got rid of some of the smell from my exhaust. I have always thought rich idle caused the smell, but I'm now thinking it was a too lean of a idle causing some of the smell? At least in my case.
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Re: Carter AVS tuning problem
[Re: Challenger 1]
#1454761
06/18/13 12:41 PM
06/18/13 12:41 PM
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Joined: Feb 2003
Posts: 10,218 Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,218
Someplace you aren't
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Can you get the plugs out and tap it for regular AVS mixture screws? I've never had an AVS with the plugs. Mine always had screws and I could get the idle set right where I wanted it. I think the only ones I have had were 69-71 model carbs.
I want my fair share
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Re: Carter AVS tuning problem
[Re: Jim_Lusk]
#1454763
06/18/13 03:01 PM
06/18/13 03:01 PM
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Joined: Jan 2003
Posts: 7,843 Spring Mount, PA
MOPAULY
OP
master
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OP
master
Joined: Jan 2003
Posts: 7,843
Spring Mount, PA
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Quote:
If you have that screw all the way in (counter clockwise) that is the richest setting. They have left hand threads so that leaner and richer are the same rotation as a fuel screw.
The manual tells me the opposite? fully seated is lean? right now it's fully seated, rpms go up if you turn clockwise and back it out.
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Re: Carter AVS tuning problem
[Re: Jim_Lusk]
#1454764
06/18/13 04:04 PM
06/18/13 04:04 PM
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Joined: Jan 2003
Posts: 7,843 Spring Mount, PA
MOPAULY
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Spring Mount, PA
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Wait, are you saying that full in is all fuel and no air? I may be misunderstanding the purpose of this adjustment...if that is the case, this thread answers it and I've been adjusting it backwards: https://board.moparts.org/ubbthreads/showflat.php?Number=7637012&page=0to that point good thing I didn't have the impact on full hammer when I took the driver side wheels off as they are reverse thread, I didn't realize there were still doing that in '68.
Last edited by MOPAULY; 06/18/13 04:06 PM.
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Re: Carter AVS tuning problem
[Re: Jim_Lusk]
#1454771
06/18/13 09:17 PM
06/18/13 09:17 PM
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Joined: Jan 2003
Posts: 9,436 Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
I believe what you are describing is a backfire device, but I could be mistaken...
Actually it is a hot idle compensator and not on a 68 carb,also,to SCG,there are mixture screws behind the plugs.Here is one with the plugs removed and mixture screws installed.
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Re: Carter AVS tuning problem
[Re: 62maxwgn]
#1454772
06/19/13 01:19 PM
06/19/13 01:19 PM
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Joined: Jan 2003
Posts: 7,843 Spring Mount, PA
MOPAULY
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Joined: Jan 2003
Posts: 7,843
Spring Mount, PA
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Quote:
Quote:
I believe what you are describing is a backfire device, but I could be mistaken...
Actually it is a hot idle compensator and not on a 68 carb,also,to SCG,there are mixture screws behind the plugs.Here is one with the plugs removed and mixture screws installed.
any real benefit to this? It will eventually get replaced with a holley so I don't know if I'd bother with it. Plus it takes away from the resto factor should I get to that point.
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