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Technical
1641 with dual Del 40s- Timing?
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<blockquote data-quote="atafonso" data-source="post: 607574" data-attributes="member: 23592"><p>The brake servo can be connected to n.3 only and works well.</p><p>There is a bypass screw on each corner for fine tuning, most people leave them fully closed as they can be adjusted only by the more advanced tuners/mechanics. I adjust them using my carb flow meter, but normally they are pretty close, so if i were you i would not touch them. </p><p>You might have a blocked idle jet as others have said, try unscrewing slightly the idle jet with the engine running and see if the pop stops. If it does, you know there is a blockage on that idle circuit.</p><p>The vac take offs at the bottom are for tuning or for vaccum gauges, they work when you unscrew them about half a turn. Keep them all closed if you not using a vac gauge. </p><p>On the left carb, there is one extra vac port on cyl4, that is for the vaccum distributor. If you using a 009, blank that as it will leak vac if not blocked.</p><p></p><p>Abel</p></blockquote><p></p>
[QUOTE="atafonso, post: 607574, member: 23592"] The brake servo can be connected to n.3 only and works well. There is a bypass screw on each corner for fine tuning, most people leave them fully closed as they can be adjusted only by the more advanced tuners/mechanics. I adjust them using my carb flow meter, but normally they are pretty close, so if i were you i would not touch them. You might have a blocked idle jet as others have said, try unscrewing slightly the idle jet with the engine running and see if the pop stops. If it does, you know there is a blockage on that idle circuit. The vac take offs at the bottom are for tuning or for vaccum gauges, they work when you unscrew them about half a turn. Keep them all closed if you not using a vac gauge. On the left carb, there is one extra vac port on cyl4, that is for the vaccum distributor. If you using a 009, blank that as it will leak vac if not blocked. Abel [/QUOTE]
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1641 with dual Del 40s- Timing?
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