hi the big screw is air only for both barrels per carb as there is no traditional curb idle screw to hold carb throttle open a bit to idle , they close tight on a ram , once warm keep both sides on air valve exactly the same turns from all in . They wanted a good balance side to side — why they did this , otherwise linkage would fight two independent settings there are two front barrels with a throttle plate in each one , may not fit exactly the same so two screws in front allow separate gas flow at idle but in reality keep both pretty near the same number of turns out The stock screws wear from endless playing with them , as does carb seat inside , after many years action becomes almost on off instead of smooth change you need Edelbrock screws fit Edelbrock carb it is an evolved AFB , they fix that . huge discovery for me , before that i always got the feel the screws “ did not work right “it “ one did nothing etc ” my experience Dont worry about too many emails , we all share and learn ; I hsve learned so much here . use factory ram info you should be good! On Oct 25, 2024, at 8:56 AM, Drew W Carl <drew@xxxxxxxxxxxx> wrote:
I am sending this to each person that replied to me individually.
I have never quite figured replying in this server so that
everyone doesn't have to see my emails over and over again so this
is what seems the most logical.
I got back to work on this yesterday. I verified the choke is
coming off. I am starting to understand the high idle cam and it
seems that the stop is still on that cam but just barely touching
it. I did find the carb nuts slightly loose, one in particular was
close to a full turn so I think I had a vacuum leak there causing
a lot of my issues. I did put a vacuum gauge on the car and was
fairly steady at 15 and climbed to around 18 with a little
throttle so I am thinking I am okay there.
After snugging down those bolts and following the directions Bob
sent me on John Holt's site and I was able to get the car to idle
at least though it is still a bit rough. I have a couple
questions, the main one being what exactly are the mixture screws
doing vs what the idle bypass screw is doing. The next is why are
there two mixture screws? Should one be used differently than the
others? Should they be used evenly?
John - What do you mean by E needles, the edelbrock screws? Any
idea where I would get those? Just look up edlebrock idle screws
for a carter afb?
The car has never really run right and has always felt rich to
me. It has always stumbled when the second carb kicks in pretty
badly and takes a lot of throttle to come out of that stumble. I
don't intend to race the car but it would be nice if it ran
correctly. It also seems to guzzle fuel which would make sense
with my thoughts that it runs rich. Another odd thing is it throws
a ton of water and soot on startup, but only from one exhaust pipe
not both.
On 10/22/2024 8:51 AM, John Grady
wrote:
try edelbrock idle screws , the old ones if “
adjusted” a lot get rings of wear around cone cannot adjust
right .become on -off action . E needles are slightly
different angle etc will seal in a new place
Hi Drew;
These dual AFB Carters are a little different because of
their
bypass screw. There is a section in the service manual,
see 14-37. If you don't have a service manual you can
use the one on John Holt's site
http://www.jholst.net/62-service-manual/fuel.pdf
Give a shout if you need anything else.
Bob
On 10/22/2024 1:17 AM, Drew W
Carl wrote:
Hello all, Attached is a picture I took today of my
uncles 62 Sport. Many of you are aware of this car, it has
gotten around a bit the last couple years. It has a inline
dual setup just like an H would have with the 413. My
question is does anyone know of any videos, or documents I
could use for adjusting the carbs? The car runs but has
never run quit right, it has always seemed rich to me. I
am fairly handy mechanically, but have never had much
experience or skill adjusting carburetors. When I took it
to this bridge today to take the pictures the car did not
want to idle at all. Previously it idled fine, had the
carbs and intake off at one point and it has not been
right since. I tried to adjust it a while back and made it
worse, and now I don't recall which screw I even turned.
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