How to Build a Slack Tube

Tim in Mexico

Its 50 Inches of ref liquid you are using.

Regards.

Rakesh is correct, this site explains it clearly.

1/4" will give you problems with air bubbles, use 1/2".

And yes, the above replies are correct that the differential is the total of the two.

Thanks for the clarification guys.... I thought that was correct, however the differental was at least twice normal prompting me to second guess a little.

Again, Thanks for the reply.

Drop across (across) an aftercooler (diesel engine I suppose) will be in 'water column' pressure units, but manifold pressure (turbo boost) will be in mercury pressure units. So I take you literally meaning "across an aftercooler" and not what some books suggest as 'manifold pressure' which is also measured with a slack tube. Not sure why you are using low SG fluid, because this will affect your reading, but, bless you anyway !!! The SG looks like a hydrocarbon (diesel fuel?) .... careful with fire if so. If you use diesel, and it blows out onto a hot turbo, it may ignite.

You need to build a 3 (or 5 ) way manifold if you want to energised the slack tube while there is pressure already present or you'll blow the liquid out. i.e. 2 legs in / out of your slack tube across the AC, then a valve 'shunt' between the two legs, open before you start up the AC, then you close it while running and Delta P is applied on both sides of the tube at the same time so the liquid does not blow out of one side.

Cheers