Why does it bog?
Thread Starter
Senior Member
Joined: Jun 2007
Posts: 428
Likes: 2
From: Elizabethtown,Ky
Car: 1984 camaro z28
Engine: L69 H.O
Transmission: 700r4
Axle/Gears: 3.73
Why does it bog?
should my carb bog down on quick throttle movements its fine if you increase the throttle normally but if you slam the throttle really fast it seems to bog here is a video to show you what i mean
http://s14.photobucket.com/albums/a3...t=SANY6590.flv
http://s14.photobucket.com/albums/a3...t=SANY6590.flv
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
How is it when you drive it?
What distributor are you using?
Where is your timing set?
What distributor are you using?
Where is your timing set?
Member
Joined: Mar 2008
Posts: 251
Likes: 1
From: South Carolina
Car: 1986 Iroc-Z
Engine: 355 Phase 2 Bowtie heads
Transmission: 700r4
Axle/Gears: 342
Re: Why does it bog?
your four barrel could be coming in too soon. i have the same set up and it was a problem for me.
also, i bought a rebuild kit with brass floats, brass seats,and a different vacum secondary. my vacum secondary now has a bracket where i can change my springs, it looks like a street avenger now. big improvement!
also, i bought a rebuild kit with brass floats, brass seats,and a different vacum secondary. my vacum secondary now has a bracket where i can change my springs, it looks like a street avenger now. big improvement!
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Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: Why does it bog?
Its a Holley - your accelerator pump linkage is probably out of adjustment (too loose). Get it all snugged back up and I'll bet most if not all of the bog goes away.
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iTrader: (2)
Joined: Apr 2008
Posts: 41
Likes: 0
From: Alamance, NC
Car: 1992 Camaro RS
Engine: 305 TBI
Transmission: T-5
Axle/Gears: 3.27
Re: Why does it bog?
Vacuum secondaries are only supposed to open under load while driving. If they are opening while you throttle by hand then the spring is too soft and the car will fall flat on its face until the fuel can catch up with the air.
Junior Member
iTrader: (2)
Joined: Apr 2008
Posts: 41
Likes: 0
From: Alamance, NC
Car: 1992 Camaro RS
Engine: 305 TBI
Transmission: T-5
Axle/Gears: 3.27
Re: Why does it bog?
Why did you lose the Q-jet carb? It flows around 770cfm as is. Lightly modified it can reach 850cfm.
Thread Starter
Senior Member
Joined: Jun 2007
Posts: 428
Likes: 2
From: Elizabethtown,Ky
Car: 1984 camaro z28
Engine: L69 H.O
Transmission: 700r4
Axle/Gears: 3.73
Re: Why does it bog?
It stumbles when you slam it from a dead stop when driving but if you ease into it for a second the slam it it will light the tires up and take off. I got the shop to set the timing back to stock cause i don't own a timing light i dunno what the stock timing was but thats what he set it to. The distributor is an accel vac advanced stock replacement with an accel super coil and ac delco plugs. i lost the quadra jet cause i tried to rebuild it and failed and didnt have time to send it to someone to get rebuilt cause i really needed it for a daily vehicle so i just bought the holley.
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TGO Supporter
Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: Why does it bog?
It stumbles when you slam it from a dead stop when driving but if you ease into it for a second the slam it it will light the tires up and take off. I got the shop to set the timing back to stock cause i don't own a timing light i dunno what the stock timing was but thats what he set it to. The distributor is an accel vac advanced stock replacement with an accel super coil and ac delco plugs. i lost the quadra jet cause i tried to rebuild it and failed and didnt have time to send it to someone to get rebuilt cause i really needed it for a daily vehicle so i just bought the holley.

Re: Why does it bog?
Classic description of what happens when the accelerator pump linkage gets sloppy and out of adjustment. When it gets loose, it will give the pump shot too late after the throttle has been cracked open, and probably too little of a shot too. This is why it will bog - its leaning out badly when you snap the throttle open. Check the accelerator pump linkage, I'll bet it feels somewhat loose and sloppy. Tighten it up and I bet your problem is solved. All you need to do is just adjust all the slack out of it. Easy.
would the accelerator pump linkage being loose also cause a bog from a dead stop to a hard acceleration?????
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Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It would bog if the timing was set to stock rather than what a non-computer distributor timing should be set to.
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