7tooZ Posted December 3, 2017 Share #25 Posted December 3, 2017 On my carbs it is the vacuum source the connects to the distributor for vacuum advance. I can send pictures if needed. Sent from my iPhone using Classic Zcar Club mobile Link to comment Share on other sites More sharing options...
sweatybetty Posted December 5, 2017 Share #26 Posted December 5, 2017 On 12/2/2017 at 7:03 AM, Jeff Berk said: I got the last two bolts off and noticed that the inside of the intake is very rough. Would smoothing it out and polishing help performance or would it be a waste of time? i have read that leaving the inside of the intake rough helps keep the fuel mixture mixed a little better. adds a little turbulence. Link to comment Share on other sites More sharing options...
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