Author Topic: Tubes and Hanger questions....  (Read 2079 times)

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Tubes and Hanger questions....
« on: April 11, 2020, 05:04:14 PM »
A quick question on "tubes".  Can someone please take a look at the attached photo and tell me if I'm correct?  From outboard to inboard, these tubes are:

Secondary Bleed Tube, aka "Secondary Tube", which should be .036 ID in recipe 2

Pull Over Enrichment Tube, which should be .055-.059 ID in recipe 2

Main Well Bleed Tube.....  What should the ID be on that tube in recipe 2?

Also, Cliff says for recipe 2, the secondary metering rod hanger should be "G or higher".  Does "higher" mean higher in the alphabet or bigger going down to the letter A???  My hanger is an "N".  Is that "higher" than G?  May be over-thinking but better now than later.....I had another question but now I can't remember.......

Thanks everyone for your help, and to Cliff for a great book.  I read it several times and just about everything finally clicked after I got my carb apart to look at.  Book's a little dirty now though....

Offline Frank400

  • Jet Head
  • ****
  • Posts: 268
Re: Tubes and Hanger questions....
« Reply #1 on: April 11, 2020, 05:23:29 PM »
the outer tubes are the secondary POE tubes.  Then, the other ones, which are large, are the primary  POE tubes.  Then, closer to the center of the carb, the smallest ones, are the secondary bleeds, which Cliff recommends to be at around .036 (his recommendation).

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Re: Tubes and Hanger questions....
« Reply #2 on: April 11, 2020, 05:34:10 PM »
Thanks, Frank, so no "main well bleed tube" as in page 126, or is that just another name for them??

Offline Cliff Ruggles

  • Administrator
  • Qjet Hero
  • *****
  • Posts: 5418
Re: Tubes and Hanger questions....
« Reply #3 on: April 12, 2020, 03:51:15 AM »
The smaller tubes with the tiny restriction in the end are the main well bleed tubes.  They have been given many names over the years, secondary emulsion tubes, secondary bleed tubes, etc.  They are the only tubes that hang into the fuel supply passages to the secondary fuel nozzles.....Cliff

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Re: Tubes and Hanger questions....
« Reply #4 on: April 12, 2020, 04:18:31 PM »
Got it, thanks Cliff.  Will be ordering parts, I'll email you as well. 

DT

Offline lightning boy

  • Carb lover
  • ***
  • Posts: 79
Re: Tubes and Hanger questions....
« Reply #5 on: April 14, 2020, 08:35:38 AM »
Someone please answer the hanger question.

Offline Kenth

  • Jet Head
  • ****
  • Posts: 434
Re: Tubes and Hanger questions....
« Reply #6 on: April 14, 2020, 12:03:32 PM »
There are hangers stamped B to V (no Q).
With B the secondary rods hangs highest of the bunch out of the secondary metering orifices, and the rest lowers the rods in .005" steps.
Rochester used the 20 different hangers to do specific model calibrating at flow test.

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Re: Tubes and Hanger questions....
« Reply #7 on: April 14, 2020, 08:22:39 PM »
Thanks Kenth,

So actually, a "C" WOULD be "higher", as referenced by Cliff, than an "N" when he says "Use a hanger that is higher than G", correct?

Offline Kenth

  • Jet Head
  • ****
  • Posts: 434
Re: Tubes and Hanger questions....
« Reply #8 on: April 15, 2020, 11:54:05 AM »
Yes, that

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Re: Tubes and Hanger questions....
« Reply #9 on: April 15, 2020, 04:37:14 PM »
Thank you sir.   

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Re: Tubes and Hanger questions....
« Reply #10 on: April 16, 2020, 06:15:10 PM »
Hey Frank....Another tube question.....

Quote
the outer tubes are the secondary POE tubes.  Then, the other ones, which are large, are the primary  POE tubes.  Then, closer to the center of the carb, the smallest ones, are the secondary bleeds, which Cliff recommends to be at around .036 (his recommendation).

My outer tubes, the secondary POE tubes, are quite large at .076

Primary POE tube is also large at .084, I think Cliff recommends .055-.059 on this one....

Inside tube, the secondary bleeds are right where they should be at .023, Cliff recommends .036. 

How do I downsize the tubes that are currently too big?
« Last Edit: April 16, 2020, 06:19:34 PM by WideTrack »

Offline Cliff Ruggles

  • Administrator
  • Qjet Hero
  • *****
  • Posts: 5418
Re: Tubes and Hanger questions....
« Reply #11 on: April 17, 2020, 02:58:14 AM »
The POE tubes are not altered in any way.

On the secondary side the POE has a restriction in the airhorn or exit hole.  You can make modifications there to improve fuel delivery.....Cliff

Offline WideTrack

  • Garage guy
  • **
  • Posts: 30
Re: Tubes and Hanger questions....
« Reply #12 on: April 17, 2020, 09:24:08 AM »
Got it, thanks Cliff.