Re: 440 six pack issues
[Re: lazybooker]
#2302293
05/10/17 11:25 AM
05/10/17 11:25 AM
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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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There is nothing wrong with the #31 squirter,it is just a momentary thing,get up to #64 jets and I think you will be fine.My 6pk 4spd Superbird has an old Direct Connection Street Hemi grind 280/474,#65 jets in center,outboards have #91 passenger side,#93 driver side,36* total and runs like a clock,wouldn't change a thing.
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Re: 440 six pack issues
[Re: lazybooker]
#2305257
05/16/17 12:29 AM
05/16/17 12:29 AM
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Joined: Dec 2007
Posts: 18,153 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,153
Mass
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I have installed a Carter street pump, purple diaphram springs, 64 main jets and I still have the same issue. I did however wire the outboards closed and the car runs just fine at WOT. With the outboards hooked up the engine spits and sputters between 3000 & 3500 and nose dives. The outboards are moving. Is it possible that it is spiking lean when they open ? Where should I go from here ? Have you confirmed there's fuel in the outboard bowls?, and established the proper fuel float height?
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Re: 440 six pack issues
[Re: lazybooker]
#2305317
05/16/17 02:08 AM
05/16/17 02:08 AM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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Where should I go from here ? when your foot is on the floor and it's sputtering and popping.......the fuel pressure is??
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 440 six pack issues
[Re: lazybooker]
#2305378
05/16/17 09:33 AM
05/16/17 09:33 AM
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Joined: Feb 2005
Posts: 4,309 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,309
Prospect, PA
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I have installed a Carter street pump, purple diaphram springs, 64 main jets and I still have the same issue. I did however wire the outboards closed and the car runs just fine at WOT. With the outboards hooked up the engine spits and sputters between 3000 & 3500 and nose dives. The outboards are moving. Is it possible that it is spiking lean when they open ? Where should I go from here ? Can you elaborate on "spits and sputters? Does it bog/hesitate for two or three seconds and then start accelerating again?, or will it not go past 3500? What happens if you drop the hammer from a slow roll just off idle? Will it run up to 3000 before there is a problem? What gear do you have? We're 5 pages into this so I have lost track. Are these new carbs? Have you double or triple checked to make sure that the outboard carbs have the fuel level at or above the sight hole opening? Make sure that the fuel is trickling out a bit. You should be able to idle the car in park, disconnect the outboard carbs, and throttle up the car using one outboard carb to make sure that the main circuit is feeding through the booster. Then do it to the other. Do that after you check the fuel bowl levels again. Report back results and we'll go from there.
Last edited by BSB67; 05/16/17 09:44 AM.
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Re: 440 six pack issues
[Re: lazybooker]
#2305454
05/16/17 12:40 PM
05/16/17 12:40 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I know this post has went on forever but I am still not able to solve the issue. I hope you guys don't give up on me. This is my first six pack experience. You're fine bro & in fact the toughies are the ones we learn from. I ain't never had one but I hear 6 paks are awesome/tremendous/killers once they are right.
live every 24 hour block of time like it's your last day on earth
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Re: 440 six pack issues
[Re: lazybooker]
#2305456
05/16/17 12:45 PM
05/16/17 12:45 PM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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Last night I tied the outboards closed and test drove it. It hit 5000 on the two barrel with no issues. The problem only happens with the outboards. Still like/need to know what the fuel pressure is at WOT. The problem is simple. Either the end carbs aren't flowing enough fuel because there is something wrong with one or both of them........ Or........ The fuel system doesn't supply enough volume to keep up with the demand when the outboards are opened. If the pressure at WOT with all carbs operational remains at 4psi or more, it's a carb issue. If the pressure drops to like 0-2psi, it's more likely a supply issue.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 440 six pack issues
[Re: DAYCLONA]
#2305478
05/16/17 01:50 PM
05/16/17 01:50 PM
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Joined: Nov 2007
Posts: 511 South Georgia
tx9cuda
mopar
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mopar
Joined: Nov 2007
Posts: 511
South Georgia
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I have installed a Carter street pump, purple diaphram springs, 64 main jets and I still have the same issue. I did however wire the outboards closed and the car runs just fine at WOT. With the outboards hooked up the engine spits and sputters between 3000 & 3500 and nose dives. The outboards are moving. Is it possible that it is spiking lean when they open ? Where should I go from here ? Have you confirmed there's fuel in the outboard bowls?, and established the proper fuel float height? Verify that you have fuel in the outboard bowls, if so pull the outboard bowls and check to see if something crazy is going on with the metering plates (orifices blocked or not drilled). Sounds like you are getting all air and no fuel through the outboards.
1971 BS23H1B
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Re: 440 six pack issues
[Re: fast68plymouth]
#2305479
05/16/17 01:51 PM
05/16/17 01:51 PM
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Joined: Jan 2003
Posts: 4,707 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,707
Moved to N.E. Tennessee
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Have the outer carbs been apart or messed with? Any aftermarket parts? Gaskets that are incorrect, defective, damaged or missinstalled could block the main circuit fuel to the boosters.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: 440 six pack issues
[Re: lazybooker]
#2305509
05/16/17 03:02 PM
05/16/17 03:02 PM
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Joined: Jul 2013
Posts: 1,272 Northern Calyfornua
Sxrxrnr
pro stock
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pro stock
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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Last night I tied the outboards closed and test drove it. It hit 5000 on the two barrel with no issues. The problem only happens with the outboards. This finding is valuable information eliminating many other possibilities. Now might we shutdown only one of the outboard carbs?
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Re: 440 six pack issues
[Re: lazybooker]
#2305522
05/16/17 03:20 PM
05/16/17 03:20 PM
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Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
top fuel
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top fuel
Joined: Jun 2012
Posts: 1,899
MYRTLE BEACH SOUTH CAROLINA
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Thanks so much. You know its a bad day when you tear a bowl gasket and you don't have one:( Parts should be here tomorrow and I'll try again. The carbs are new and I have 62 jets. Should I up them and what should I up them to ? 64 ?? ----------*** the carbs are brand new ? and you had them open ? did you open the outboards ? ? AS SUGGESTED , you need to verify fuel pressure to figure out if it is a supply problem or in the carbs . the wrong/installation or gaskets blocking main fuel holes ? you can visually see fuel coming out of the main boosters if you check one at the time.....are the outboard idol screws open enough ?
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Re: 440 six pack issues
[Re: lazybooker]
#2305659
05/16/17 08:10 PM
05/16/17 08:10 PM
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Joined: Feb 2005
Posts: 4,309 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,309
Prospect, PA
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...The fuel levels are just at the bottom edge of the sight hole and will trickle out... Did you adjust them to this level, or was this the way they came? How long ago did you check? It is time to double and triple check stuff. Even if they look perfect, adjust them up just to check. Get some rags, and let the fuel roll out. You could just run them up until fuel comes out the booster, just to check. Don't do that with the sight hole screw removed.
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