Results 1 to 3 of 3

Thread: fuel pressure

  1. #1
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
    Join Date
    Aug 2006
    Posts
    5,777
    +1
    405

    fuel pressure

    my lonestar II keihins have a return fuel issue.the pro runs the originals has 3 pumps and 3 pulse lines.the return psi runs 1.5 idle 6 at wot and uses a 130 return jet.on the virage setup i've got 2 pumps feeding 3 carbs.i used a 80 return jet on it but the return psi never got over 1.5 so i never did any long wot runs.i clamped off each pulse line and they both responded the same.so i rationaled that these maybe whats happening.130 jet diveed by 3 is 43.so each carb wants a 43 return jet,time 2 for 2 pumps is 86 thats what i was thinking but didn't account for this.one carb isn't contributing at all.so i'm thinking now maybe a 40,42,45.to do this i gotta remove the brass return fitting from the middle carb and use a different one i've got that will tap and hold the smaller jets


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,330
    +1
    31
    Do you not have a single return hose? You can restrict that to affect all carbs.

  3. #3
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
    Join Date
    Aug 2006
    Posts
    5,777
    +1
    405

    psi

    both skis run single return lines,follow along,single carb single pump 43 return jet,dual carbs dual pumps 86 return jet,triple carbs triple pumps 130 return jet,so dual pumps run a 86 jet,i ran an 80,but there's another carb pulling fuel,so i'm hoping the 42 will do the job.my first time thru with se on the pro ran 2 pumps on 3 carbs but i used the cast return restriction in the third carb which was at the very end of the fuel before returning to the tank.the virage idles fine,will takeoff good,but at 2800 rpm held then wot its got a nasty stall in it whih i'm contributing to the lack of fuel pressure,at 3000 rpm and it lights its right on the edge of burning the prop.a stock 7.0 i tweaked

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Installing Fuel Pressure Regulator
    By Red Devil in forum 4-Tec Performance
    Replies: 8
    Last Post: 12-17-2007, 09:19 PM
  2. how to install this fuel pressure regulator?anyone know?
    By novice_4 in forum 4-Tec Performance
    Replies: 24
    Last Post: 05-23-2006, 12:18 AM
  3. fuel pressure regulator
    By Pale Rider in forum 4-Tec Performance
    Replies: 15
    Last Post: 04-26-2006, 06:23 PM
  4. Fuel pressure regulator
    By Pale Rider in forum 4-Tec Performance
    Replies: 3
    Last Post: 04-11-2006, 06:14 PM
  5. fuel pressure
    By Robsauto2 in forum Yamaha PWC Performance (2-stroke)
    Replies: 23
    Last Post: 09-13-2005, 08:14 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •