@fastgtfairlane @MTRHEAD @Quinc thank you for the knowledge and experience. My logic with the larger N/S and heavier spring was to achieve my same/similar popoff pressure while making it more difficult for the vibrations to shake that needle open. I have read many comments that the vibrations can cause the needle vibrate off the seat. The heavier spring will help with that. I am aware that the smallest N/S is capable of flowing enough fuel for almost any motor as the SBN manual claims.
Also, my jetting was based one pilot change at a time while using the low speed adjuster to confirm a lean low speed and/or too high of pop off. I finally came to 130 low being very good. I changed my mains from there using the same method until i got to 127.5, and i had to stop there because i had a pulse line pop off which siezed my motor. It left a nasty scar so I had it bored and it was improperly clearanced. So, this caused me to think i was lean seizing (nope, just poor clearance). BUT i didn't realize the clearance was poor so i kept upping the jets until the seizing stopped but obviously it never did. So i had it bored again. This time clearance is good, BUT on my first test ride after break in i noticed smoke emitting from my carbs. So, i checked my reeds and found them to be quite bent. I then installed these new VF3 reeds and Wax manifold since i was down there anyway. Upon firing up the ski on the stand after installing these items i found the issue of fuel leaking out of the venturis. Now i am here.
I hope that helps clear up why my jetting seems off. I never really got an opportunity to continue tuning.
Prior, i was using a stock ported intake (just opened the top of the intake to match the carbs). The prior reeds were some older dual stage setup from a "Race 05" Pro-tec race motor i had. So, i am aware my jetting will need to change. For now, i am just trying to stop the fuel from coming out of the venturi while idling on a stand. Once that is solved i can go back to really tuning. I do not believe that my mains being too big are causing this dribble. There should be almost no signal at the venturi when the blade is just cracked open, right?
I think either my needle is vibrating open, my seal is poor, or i just have a very high fuel pressure now due to a stronger pulse compared to the prior bad reeds. I am trying to solve the problem in that order, leaving the fuel pressure issue as my last resort.
I do want to know: is the orifice in the stock restrictor 0.030"? I read that in a different post. I am asking because if most people are saying to drill the stock restrictors and start with a #60 jet in the return and it may go up to #70 or #80. However, if 0.030" is 0.76mm, how could one 0.76mm restrictor in each carb cause a higher fuel pressure at the needle than one #70 (0.7mm) restrictor in the return line that each carb is now sharing? I can only imagine the fuel pressure dropping at the needle if the return restrictor is at least #80.
FYI i hope my writing does not come off argumentative. I love these types of conversations. I may seem argumentative because my brain is wired to learn by explaining my theory, and then being corrected or supported. It really helps the lightbulb go off!
