Tech Gurus / reno sparks pro watercross or jet jam
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  1. #1
    Resident Guru bossten1's Avatar
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    Tech Gurus / reno sparks pro watercross or jet jam

    wondering if anyone has ever had problems not reaching peak rpms after using a r&d timing advance?
    or same with v force 3 reeds?
    my sxr 1100 only wants to pull into the 7000 rpm range. used to hit 7500-7600

    specs .
    elevation 4500'
    triple mikuni 46s on dasa intake.

    just rejetted from 130 mains to 125s. pilots at 122.5 but hits hard and pulls away to mid range real nice. just can't seem to reach top rpms. 2.3 needle and seat. I'll open and check maybe I'm still too fat? tried 117.5s high jet and seemed too lean.
    solas 13/21 -5
    Kommander head 30cc domes
    kommander routing into TDR box.
    125 stinger jet. dual cooled one line dedicated to cooling manifold other line tee off for stinger. 2 lines off head overboard and one line off chamber overboard. died out pipe.
    no porting.
    have 3 dedicated pulse lines and 3 fuel pickips.
    changes I made this year were adding mikuni 46s , timing advance, dasa intake and v force 3 reeds. ski ran great last year before these 3 mods. even at my elevation I was able to reach great rpms before.
    r&d and v force were added 1st then intake and 46s later.
    ski runs good but just like its lazy up top. tuning to almost 1/2 open now up top. maybe I need to try some 122.5 mains ? just doesnt scream around like it used too.
    I could use some schooling where the needle and seats and springs come into play in the circuit.
    2006 SXR
    87 550

  2. #2
    PWCToday Guru dose's Avatar
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    Re: Tech Gurus / reno sparks pro watercross or jet jam

    My setup is nothing like yours but my ski seemed to get better rpm with 44s than the 46s.
    Better velocity with smaller carbs?
    Pretty sure needle and spring is just to dial in your popoff.
    I read a 1.5 needle will flow as much fuel as the carb can handle.
    is topaz warm enough for trunks yet?
    super couch
    550sx with 701 and big pump
    550 RC-520
    809cc X2

  3. #3
    PWCToday.com Is My Home Away From Home
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    Re: Tech Gurus / reno sparks pro watercross or jet jam

    Pretty cold right now. Is your engine getting up to temp? Try going down to a 115 jet in the stinger?
    triceps are the biceps of the back of your arm.

  4. #4
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: Tech Gurus / reno sparks pro watercross or jet jam

    I think your carbs are too big for 4600' elevation. In WI here we are at 700 feet, and have had better luck with 44's on the 1100's. The only one I have had 46's on is a full mod, ported, big bored, etc.
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  5. #5
    Resident Guru bossten1's Avatar
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    Re: Tech Gurus / reno sparks pro watercross or jet jam

    yep Dusty been in topaz for a couple weeks now in trunks I never wear a wetsuit mostly cause it doesn't fit anymore lol.
    ya water temps are cold here especially topaz. lahonton and washoe are much warmer and feel fine. shallower. I've been lowering stinger sizes incrementally. no problems last year with larger singers and my buddys 1100 runs like a 150 main for stinger. got a lead I should be more at 26cc domes up here with all the advance so going to call kommander today for domes and hopefully squeak in some tech talk while I got them on the phone. I think the carbs are too big too but also hearing the right internals and the benefits are better once dialed
    2006 SXR
    87 550

  6. #6
    Resident Guru bossten1's Avatar
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    Re: Tech Gurus / reno sparks pro watercross or jet jam

    mine is hitting alot harder off the bottom than my buddies hes running side draft intakes I'm running the DASA I scored from Rob Flores. I'm going to be trying to school myself on needle and seat inputs .
    2006 SXR
    87 550

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