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Re: backfiring through carb
[Re: rrunner]
#186103
01/15/09 11:04 PM
01/15/09 11:04 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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A slight vac leak will still let it stay steady(usually just a bit lower of a reading) as there's no intermittent interruption in the intake tract(which would make the vac gauge jump around) only that the mixture air/fuel ratio in the intake tract is now off enough to cause driveability issues. but if it got lean enough to cause a lean misfire then that would cause the gauge to dive for a split second as that cyl didn't do it's job.
live every 24 hour block of time like it's your last day on earth
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Re: backfiring through carb
[Re: rrunner]
#186104
01/16/09 01:05 AM
01/16/09 01:05 AM
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Joined: Apr 2003
Posts: 512 Sacramento, CA
Bdrainy
OP
mopar
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OP
mopar
Joined: Apr 2003
Posts: 512
Sacramento, CA
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Quote:
What are the specs on the cam? If it's not bumpy 15in of vacuum is late ign. timing and it would do what you say it's doing. Whats you total timing at?
It is the comp cams XE275HL. here are the specs:
Intake Duration at 050 inch Lift: 231 Exhaust Duration at 050 inch Lift: 237 Duration at 050 inch Lift: 231 int./237 exh. Advertised Intake Duration: 275 Advertised Exhaust Duration: 287 Advertised Duration: 275 int./287 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.525 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.525 in.
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Re: backfiring through carb
[Re: Dodgem]
#186106
01/17/09 06:11 PM
01/17/09 06:11 PM
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Joined: Mar 2005
Posts: 112 utah
moparhinck
member
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member
Joined: Mar 2005
Posts: 112
utah
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if your carb goes lean it will backfire on you, and since it doesn't pop when you ease into it, I would look there
1969 440 4 speed Polara 2dr
1977 Cordoba (daily driver)
1965 dart gt (my first car)
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Re: backfiring through carb
[Re: BigBird]
#186107
01/17/09 06:53 PM
01/17/09 06:53 PM
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Joined: May 2006
Posts: 2,046 ky.
kenworth_goose
top fuel
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top fuel
Joined: May 2006
Posts: 2,046
ky.
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Quote:
Sounds like the chain is off a tooth or two....
chain off one or two teeth will never make it pop through the carb. I used to run all of my 318's one tooth fast and boy does it make one run good. Check the valve springs. Pull the rockers and see if you can push any of them open with your hand.
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Re: backfiring through carb
[Re: Bdrainy]
#186109
01/22/09 05:35 PM
01/22/09 05:35 PM
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Joined: Jan 2008
Posts: 3,886 Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Good for you. I am glad it wasn't something to painful$. Just goes to show you we all forget things from time to time. Hook that advance back up and go have some fun.
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