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 Post subject: Backfire Valve
PostPosted: Tue May 29, 2018 10:29 am 
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Joined: Fri Jun 23, 2017 5:34 am
Posts: 54
Has anyone removed thier backfire valve? I suppose this is to prorect the carbs.

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Bruce - Early 260Z - 305 Light Blue Metallic - All Stock


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 Post subject: Re: Backfire Valve
PostPosted: Tue May 29, 2018 1:00 pm 
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Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12810
Location: CT
Almost everyone has removed their anti-backfire valve and capped the vacuum holes. I haven't seen a real one in about 30 years. They are just a diaphragm dashpot which makes the throttle linkage close more slowly when you take your foot off the gas quickly. That is supposed to prevent the mixture from leaning out suddenly and causing backfires out the tailpipe (not flashbacks out the carbs. There's a difference).

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1970 240Z


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 Post subject: Re: Backfire Valve
PostPosted: Thu May 31, 2018 8:44 pm 
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Joined: Fri Dec 23, 2016 7:11 am
Posts: 248
Mines removed.


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 Post subject: Re: Backfire Valve
PostPosted: Thu May 31, 2018 9:15 pm 
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Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12810
Location: CT
If you are counting on points for originality in car show judging, I guess you would want to leave it on. Mine actually drives better without it.

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1970 240Z


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