Re: popping out exhaust on decel
[Re: BLONDE BARRACUDA]
#1121243
11/25/11 08:03 PM
11/25/11 08:03 PM
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Anonymous
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Anonymous
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It is from a header leak. either at the flange or at your collector merger.Chek your header bolts or youll need to change your gasket or just run straight hi-temp silicone of the flange to head. 
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Re: popping out exhaust on decel
#1121244
11/25/11 09:56 PM
11/25/11 09:56 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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It could also be lean. Going from a full exhaust to open exhaust you'll need to richen it up.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: popping out exhaust on decel
[Re: Guitar Jones]
#1121245
11/25/11 10:55 PM
11/25/11 10:55 PM
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Anonymous
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Anonymous
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Quote:
It could also be lean. Going from a full exhaust to open exhaust you'll need to richen it up.
Not on decel only on accel.
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Re: popping out exhaust on decel
[Re: emarine01]
#1121249
11/25/11 11:44 PM
11/25/11 11:44 PM
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Anonymous
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Anonymous
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If you were lean,you'd pop out the carb not exhaust.
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Re: popping out exhaust on decel
#1121250
11/26/11 08:46 AM
11/26/11 08:46 AM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Not necessarily so. It could be real close. I know it doesn't seem like that but with the rpm's up there and the throttle closed they go lean pretty quickly. Fatten it up from where it was originally and see if that doesn't take care of it.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: popping out exhaust on decel
[Re: Guitar Jones]
#1121252
11/26/11 11:21 AM
11/26/11 11:21 AM
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Joined: Mar 2006
Posts: 9,843
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,843
MI, usa
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Quote:
Not necessarily so. It could be real close. I know it doesn't seem like that but with the rpm's up there and the throttle closed they go lean pretty quickly. Fatten it up from where it was originally and see if that doesn't take care of it.
Popping in the exhaust is from fuel igniting in the exhaust system. Briggs and Straton goes so far as to electrically close the main jet on shut-off to prevent backfire in the exhaust on shut-down. Eliminate any air leaks in the exhaust system and eliminate as much fuel as possible. If it doesn't have oxygen and fuel it won't ignite.
Doug
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Re: popping out exhaust on decel
[Re: dvw]
#1121253
11/26/11 11:42 AM
11/26/11 11:42 AM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Yeah when you shut it off, not just on deccel. Been there done that, take it or leave it. Not looking to argue with anyone, just stating my experience, YMMV. 
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: popping out exhaust on decel
[Re: dvw]
#1121254
11/26/11 11:50 AM
11/26/11 11:50 AM
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Joined: Apr 2007
Posts: 325
Greenville, WI
Big B
enthusiast
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enthusiast
Joined: Apr 2007
Posts: 325
Greenville, WI
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Quote:
Quote:
Not necessarily so. It could be real close. I know it doesn't seem like that but with the rpm's up there and the throttle closed they go lean pretty quickly. Fatten it up from where it was originally and see if that doesn't take care of it.
Popping in the exhaust is from fuel igniting in the exhaust system. Briggs and Straton goes so far as to electrically close the main jet on shut-off to prevent backfire in the exhaust on shut-down. Eliminate any air leaks in the exhaust system and eliminate as much fuel as possible. If it doesn't have oxygen and fuel it won't ignite.
Doug
I had the same problem. I leaned out my carb and blocked off my intermediate circuit, and all the popping went away. The popping is from unburnt fuel in the exhaust igniting.
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Re: popping out exhaust on decel
[Re: sixpackgut]
#1121259
11/27/11 02:47 PM
11/27/11 02:47 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
I'm guessing your car does not have power brakes?
no why?
i found a couple header bolts a little loose. i need to bump the jet back up on the center carb. another thing is i never really drove around with the bug catcher on the motor in the challenger. so if i'm goin 100mph and let off, there could be alot of air doing weird stuff in there
My 74 started popping on decell earlier this summer, the power brake booster was leaking. Also caused a erratic idle. Replaced it and all is normal again on decell.
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