Distributor Cooling Q?

[knattrass]

Charles - thanks again for your help. We added your electronic module no problems, your instruction sheet was perfect and easy to follow. We cleaned the housing, coil, lubricated, replaced seals, and remove the RF filter from the wiring connection - new wire from coil thru the cannon connector to the harness. We bent new vent lines and you mentioned-they provide coil cooling. The flared fittings on the carb elbow are just regular fittings - but I noticed an old photo in the manual that showed pitot type tubes on the ends inside the elbow. This got me thinking that mine are not complete. Should these fittings have tubes for positive ventilation? In other words, a copper tube soldered in to face upstream(positive flow) and one facing downstream in the elbow (negative/vacumm flow)? The one vent line going to the fuel tank has a pitot tube facing away from the stream and the one to the brakes is just plain. Should all 4 have this pitot tube?

[MSeriesRebuild]

Charles - thanks again for your help. We added your electronic module no problems, your instruction sheet was perfect and easy to follow. We cleaned the housing, coil, lubricated, replaced seals, and remove the RF filter from the wiring connection - new wire from coil thru the cannon connector to the harness. We bent new vent lines and you mentioned-they provide coil cooling. The flared fittings on the carb elbow are just regular fittings - but I noticed an old photo in the manual that showed pitot type tubes on the ends inside the elbow. This got me thinking that mine are not complete. Should these fittings have tubes for positive ventilation? In other words, a copper tube soldered in to face upstream(positive flow) and one facing downstream in the elbow (negative/vacumm flow)? The one vent line going to the fuel tank has a pitot tube facing away from the stream and the one to the brakes is just plain. Should all 4 have this pitot tube?

Plain fittings are ok for the fuel tank & master cylinder tubes as they only serve as vents. The fittings on the distributor tubes are the critical ones because if the wrong fittings are used here nothing happens. They must be configured so that air is forced through 1 line & pulled back through the other, in other words the air must be forced through the dist. housing to provide adequate cooling ventilation or the coil will be short lived. From your explaination, it sounds like someone has used one of the dist tube fittings in another location.

[knattrass]

Thanks Charles - we cut a 1" piece of copper tube off of the primer kit and bent it 90 degrees. We solder the tube correctly to the inverted flare fitting so that the tube points directly into the air flow. The other tube was actually straight with a long taper cut that faces away from the flow creating a vacuum. We should be good now!