Originally Posted by
sysiek
Usually I’m doing two vents with use of saddle tanks, better ventilation and just in case my tanks don’t filled evenly I can close one vent to fill the other one until level is equal, plus I never do overflow lines underneath my jet just because one’s I clogged one up with sponge that was under my jet for transport, from that moment the vents are on the lower side usually at 30-40 degrees, much easier to plug overflow tank , my vents are at least 6-8 mm lines and never smaller, remember if uat is collapsing it means vacuum that means fuel or air vents restriction!
sysiek,
I was going to do as per yours but after seeing that tanks were filling and emptying equally i opted for one vent line. As for your suggestion to place vent exit at 30- 40 degrees is definitely a good idea for next installs. i still have to find where system is producing restriction. UAT monitoring is the key for a clean and flawless fuel flow.
Originally Posted by
DAN AVILLA
I replace all my internal and exterior hoses about ever year and half. I always find the hoses are getting loose in side the tanks even though they are safety wired. You stated the the tanks are glued in. You need to make them removable to inspect the stoppers and hoses. Sooner than later they will need maintenance . Dan
DAN,
Fully agree with you. I never glue my tanks and always make sure they are easily removable or accessible for servicing and changing hoses. Unfortunately, in this case, tanks were heavily glued by original builder, who also did many mistakes which needed major modifications.
Originally Posted by
Dave Wilshere
Does it also expand when filling?
Blockage on either line in main tanks can do it. Air in UAT is probably an air leak in a Joint because the system is working hard. Or filler plug is leaking air for the same reason
Dave,
Yes the UAT expands (although much less then before) when filling but isn't this a little bit normal due to having one large main tank followed by 2 saddle tanks and 1 vent line?
i will try to change the filling plug (which is on the tygon fill Line, remove the festo 6-4 converter and replace it by a brass 6-4 coupler and check if this would make a noticeable difference
Finally thank you all for your precious input. The learning curve comes from all the inputs that each experienced modeler is providing .
Great Community!!