Standard fuel pump with DRLAs

Discussion in 'Mech Tech' started by Dicky, Mar 4, 2013.

  1. Assume that set up is ok and no pressure issues. Please advise.
     
  2. Silver

    Silver Needs points/will pay!

    Mine is running fine, twin 40's and mechanical pump. No problems.
     
    Dicky likes this.
  3. Thats something less to do then. Got most of my stuff together now. Need to do servo connection. Got a barb so need to drill and tap. Manifolds arent that thick for ally tbh - I mean to get a thread in! Is one connection adequate.
     
  4. having take-offs tigged onto mine, one per barrel, makes balancing them easier so i have been told

    last thing you want is a vac leak.... leak equals lean mixture... equals burnt out heads
     
  5. Silver

    Silver Needs points/will pay!

    I'm no help on that one, I don't have servo brakes. Yet!
     
  6. Zed

    Zed Gradually getting grumpier

    Yes fine off one if it's not tiny.
    I have mine on a balance pipe between the carbs, the hole in the barbs is only about 4mm dia. I didn't think it would work but it does. 4mm dia is about 12 sq mm cross sectional area. I have 2 take-offs so that's 24 sq mm vac total. If I only had one 24 sq mm take-off the hole dia would be about 6mm. So if yours is as big or bigger I predict it'll work.

    I once found one attached to the teeny pipe that comes off a T1 manifold for the hot-air flap vacuum. That didn't work.
     
    Dicky likes this.
  7. Let me know how the carb install goes, got mine to do sometime soon... So any problems encountered please share!
     
  8. Thanks, think Barb ID will be above 6 mm. Will have a look.
    Thanks all.
     
  9. Probably wont do it till the weather warms up a bit tbh. Dont want to have to try to set the things up really - fitting isnt an issue.
     
  10. Zed

    Zed Gradually getting grumpier

    It'll all go wrong. Save yourself the grief and sell them to me cheap.
     
    NatchoNatchoMan and paradox like this.
  11. wheres the fun in that!!!
     
  12. i just copied what was already there regards balance pipe and hole size . I tigged one take off per manifold .
    I found the CB linkage needed a lot of work to get right . vent /jetting size was fun .
     
  13. Get the book, the white one with the carb on the front it will tell you how to ballpark set them up before install, also the guys at eurocarb will give you ball park jetting info too
     
  14. uploadfromtaptalk1362485400276.jpg
     
  15. Got that and read it!!!! I might have understood some of it.
    Not sure whos linkage I have - its a Bell Crank jobbie I believe rather than a hex bar
     
  16. Just got manifolds back... With vac take offs
    uploadfromtaptalk1362847212662.jpg
     
  17. Interesting. Same fanny-moulds as me. Is that all quite robust! would be afraid of breaking one of those.
     
  18. All pretty well tigged together, with the small sections of rubber to allow for the odd vibration.....
    The Ali tube is 2mm thick so is pretty stiff
     
  19. Sounds well considered. How far you off putting them on?
     
  20. Have to see when when I install them!
     

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