Edelbrock 1406 Question

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FlDart360

FlDart360

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Just bought a used 1406, and during the rebuild i noticed one of the two ideal mix screws goes much further in than the other. There is no damage to the threads and it does not make a difference which ideal screw i try. should they both bottom out about the same? There is almost an 1/4 inch difference in the bottom out point. I have always had Holley's so i don't know if this is normal.
 
Is the height of the screws tops the same?
 
Have you tried to tune it and if so where does the idle screw start to change the idle? How many turns out for each before there is an effect?
 
IMG_0806.jpg


Yes I left the springs off.
 
Are you turning them by hand ?
I just rebuilt a 1406 I had laying around last night (I was bored) and had same thing happen until I used a screw driver. Just needed a little more torque than my fingers could provide and it threaded in the rest of the way.
I removed them and cleaned out the passages afterward.
 
mbaird said:
I just rebuilt a 1406 I had laying around last night (I was bored)
Click to expand...
:rofl:

:thumbsup::thumbsup::thumbsup:
Same thing happened to me one night. So I took my Edelbrock heads down and did a quick valve job. Just hit the valve seats real quick and sent it running.
 
mbaird said:
Are you turning them by hand ?
I just rebuilt a 1406 I had laying around last night (I was bored) and had same thing happen until I used a screw driver. Just needed a little more torque than my fingers could provide and it threaded in the rest of the way.
I removed them and cleaned out the passages afterward.
Click to expand...


Maybe I am looking at this wrong. Instead of one side going in to far, maybe the other side is not turning in far enough?
 
Pull them out and compare them side by side. Also inspect the taper they should be the same.
 
Spray some carb cleaner in both of those idle Jet holes and blow out with compressed air. Should be able to see the mist of the carb cleaner as you blow out the jet ports, both the same.

Run a parts tag wire through them too, may be a spec of rust or sand in there.

Screenshot_20210416-214121_Gallery.jpg



Screenshot_20211211-145611_Gallery.jpg

Proper idle screw depths ^^^.
 
mbaird said:
Are you turning them by hand ?
I just rebuilt a 1406 I had laying around last night (I was bored) and had same thing happen until I used a screw driver. Just needed a little more torque than my fingers could provide and it threaded in the rest of the way.
I removed them and cleaned out the passages afterward.
Click to expand...

Well I have cleaned everything and can see and blow air thru it with no problem. Maybe the casting is off. I used a screw driver and worked it back and forth with no difference. At this point i probably should wait and see how it tunes.
IMG_0807.jpg
IMG_0810.jpg
IMG_0811.jpg
 
Huh.... looks like they are the same .
Camera angles different between the 2 pics but appear to be covering equal amounts of the orifice.
Weird...
 
That’s what counts. As close to equal as it can be. Your good to go and start tuning.
 
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