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10-04-2018, 08:21 PM | #1 |
Junior Member
Join Date: Jan 2017
Location: Lincoln RI
Posts: 22
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popping back fire
I have a 1951 8ba with two 94 carbs
starts and idles fine on accell it pops thru the carbs any suggestions timing is set new internal balas 12 volt coil wires and plugs are new any suggestions |
10-04-2018, 08:56 PM | #2 |
Senior Member
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,516
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Re: popping back fire
What distributor do you have?
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10-05-2018, 09:04 AM | #3 |
Junior Member
Join Date: Jan 2017
Location: Lincoln RI
Posts: 22
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Re: popping back fire
stock steel housing distributor
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10-05-2018, 09:21 AM | #4 |
Senior Member
Join Date: Nov 2015
Location: North Pole, Alaska
Posts: 2,646
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Re: popping back fire
Anyway to swap the manifold to stock with a single carb? Do this and If it still pops out the carb check the valve train.
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10-05-2018, 09:25 AM | #5 |
Junior Member
Join Date: Jan 2017
Location: Lincoln RI
Posts: 22
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Re: popping back fire
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10-05-2018, 10:59 AM | #6 |
Senior Member
Join Date: Oct 2013
Location: Glens Falls NY
Posts: 1,267
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Re: popping back fire
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Last edited by Drbrown; 10-05-2018 at 11:09 AM. |
10-05-2018, 11:27 AM | #7 |
Senior Member
Join Date: May 2010
Location: Oregon City, Oregon
Posts: 208
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Re: popping back fire
Generally backfiring out the exhaust means too much advance and backfiring thru the carbs means too much timing retard. I'd look at the distributor and the timing.
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10-05-2018, 11:30 AM | #8 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,259
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Re: popping back fire
Guys, He has two threads going on the same subject. On the other one he says he has a stock distributor. 'nuff said.
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