Author Topic: Secondary Main Well bleed tubes  (Read 1560 times)

Offline novadude

  • Carb lover
  • ***
  • Posts: 87
Secondary Main Well bleed tubes
« on: October 29, 2013, 05:05:55 AM »
Can someone explain to me the effect these have on the fuel curve?  I notice that Cliff's recipies often recommend sizing these to 0.036" regardless of metering rod.  How much does the bleed hole affect secondary metering?

Offline Cliff Ruggles

  • Administrator
  • Qjet Hero
  • *****
  • Posts: 5418
Re: Secondary Main Well bleed tubes
« Reply #1 on: October 31, 2013, 03:49:26 AM »
The effect is minimal but does have an impact.  .036" tubes work well with metering rods in the .040-.055" range, but primary jetting also has some effect on overall A/F at WOT. 

Some airhorns will have an additional set of bleeds drilled next to the tubes, if they are left open leave the tubes at the stock size.....Cliff