273 2V bogging
#2634609
03/19/19 09:41 PM
03/19/19 09:41 PM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
OP
top fuel
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OP
top fuel
Joined: Aug 2007
Posts: 2,356
Kentucky
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After warming up the 273 in a ‘67 Barracuda it wants to bog down real bad with a quick opening of the throttle. Tried moving the timing but no real difference. Tried moving the accelerator pump with no real difference. What does seem to make a difference is to partially close the choke valve. When blipping the throttle there looks like a ton of fuel going in and that little engine sucks a lot of air. This engine sat for many years without starting. Carb is rebuilt. We can’t tell if it is getting too much air, or fuel or both.
‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500
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Re: 273 2V bogging
[Re: dfsmopars]
#2634667
03/20/19 02:05 AM
03/20/19 02:05 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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What does seem to make a difference is to partially close the choke valve. vac leak. spray starting fluid around & see what develops (block the carb with a sheet of thin cardboard etc when spraying to avoid a false positive from fluid getting sucked into the carb throat top). I'd get the RPM up to "medium" or even higher & jerk the throttle & see if it still kicks out a good shot.
live every 24 hour block of time like it's your last day on earth
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Re: 273 2V bogging
[Re: ubercuda]
#2634924
03/20/19 06:33 PM
03/20/19 06:33 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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The OP states "After warming up " probably not a blocked crossover or the choke wouldn't open.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: 273 2V bogging
[Re: dfsmopars]
#2634971
03/20/19 08:43 PM
03/20/19 08:43 PM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
OP
top fuel
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OP
top fuel
Joined: Aug 2007
Posts: 2,356
Kentucky
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Here’s the plan. I’m confident with the mixture screws. Go back to factory timing which is 5* before. Lower float level because I did notice gasket on the top staying wet. Verify the vacuum advance. Check for vacuum leaks. Then see where it from that point. The intake crossover was stopped up solid which looked like someone had poured block filler in it. Still have the valves to adjust but on its initial run down the street that little engine has a respectable amount of torque.
‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500
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Re: 273 2V bogging
[Re: dfsmopars]
#2635668
03/22/19 06:33 PM
03/22/19 06:33 PM
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Joined: Jan 2003
Posts: 3,505 DFW
mr_340
master
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master
Joined: Jan 2003
Posts: 3,505
DFW
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On my first car, a 1969 Plymouth Fury with a 318, the engine would just about die with a stab of the throttle. I rebuilt the carb and noticed the check ball in the bottom of the accelerator pump well was missing. Put a ball from the kit in there, new pump piston and all was well.
Floyd Lippencott IV
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Re: 273 2V bogging
[Re: mr_340]
#2635707
03/22/19 08:59 PM
03/22/19 08:59 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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I try 15 or even 20 initial (wont hurt you for a test) if it ain't pinging then no harm no foul.
live every 24 hour block of time like it's your last day on earth
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Re: 273 2V bogging
[Re: mr_340]
#2635860
03/23/19 10:39 AM
03/23/19 10:39 AM
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Joined: Aug 2007
Posts: 2,356 Kentucky
dfsmopars
OP
top fuel
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OP
top fuel
Joined: Aug 2007
Posts: 2,356
Kentucky
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On my first car, a 1969 Plymouth Fury with a 318, the engine would just about die with a stab of the throttle. I rebuilt the carb and noticed the check ball in the bottom of the accelerator pump well was missing. Put a ball from the kit in there, new pump piston and all was well. I rebuilt the carb and I was careful to make sure the ball got back in there. But I am going to confirm when I reset the float level. Rapid we have run the timing up as far as 15 but not 20.
‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring ‘14 Big Horn, Quad Cab, 4x4, 1500
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Re: 273 2V bogging
[Re: dfsmopars]
#2635869
03/23/19 10:56 AM
03/23/19 10:56 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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If 15 didn't do it then yes the prob is elsewhere.
live every 24 hour block of time like it's your last day on earth
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