Carburetor (specs) Database: SuperJet and Blaster 1

[Fro Diesel]

Bump for good stuff here

 

[Superrjet]

Im looking for a carb setup for one of my skies its a 61x/61x, single 46sbn coffman pipe the rest is bone stock. 120 pilot 140main and 1.5 n/s with a dull silver spring. It doesnt run full potential at all, sluggish all over tomorow ill will try to play with the needles

 

[Fro Diesel]

I would drop a 2.0n/s in there asap. What is your pop off? You can't get it right without a pop off gauge, buy one or make one.

My 46 wetjet setup is closer to what specialfx posted. Low pop off around 20psi, and super high main at 155 for the win.

 

[Fatman]

Brand = Mikuni
Model = Buckshot
Size = 46
Quantity = 1
Main Jet = 135
Pilot Jet = 135
Needle/Seat = 2.0
Spring = 80
Pilot screw = 1.25
Main Screw = 1.75
- - - - - -
Gas Octane = 93
Altitude = 200ft
Main type of riding = Rec
Would it pass the 10 second WOT test = yes
Powerband = low to mid
Motor type/setup = 62t 735 GroupK cylinder and 61x GroupK cases, FP Mod, and 165 psi

 

[superhondaz50]

Anyone have specs for dual dasa 48's, power factor pipe, on a ported 701 or 760? This is with all the bolt ons too, head, flywheel, msd, etc

 

[txsuperjetfreak96]

I've got what ed gave me for 771 pfp advent ignition should b close

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[txsuperjetfreak96]

Jeremy,
Great, Jet Specs are below.
Main Jet 135.0 @ .5 turn out
Slow Jet 125.0 - 127.5 @ 1.0 turn out
Needle Seat 1.8 special
Spring 80 gram (black) spring
Pop-off 23.5 psi
Return Jet #60 main jet in return splice
Less should get you very close.
Kind Regards,
Edward Brazina
FASTCARBS.COM
ph: 908.432.3300


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[superhondaz50]

Sweet, return jet is the one somewhere in the PFP right? Also how many turns out are you on your FCV, not exactly jetting but its part of thefuel circuit kinda lol those are dasa carbs correct?

 

[txsuperjetfreak96]

No full spec carbs, 60 main jet goes in return line to carbs. Still working on my build

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[superhondaz50]

OK got it, I know the dasa carbs still have their internal restricters

 

[superhondaz50]

Checked my jet, they are 130/130. Think I should try the 135/125 combo instead? Plugs don't look bad though...

 

[Fro Diesel]

You can't look at plugs and derive tuning/jetting specs.

Are you using a tach? That is the only thing you should look at when tuning a carb. I have never check my plugs for anything except water droplets/ water ingestion when a surf ski won't start.

 

[superhondaz50]

No, don't have a tach and never used one. Always tuned bn44 or sbn38 carbs with ease. These big 48's rather confuse me though.

 

[Roseand]

Brand = mikuni
Model = sbn
Size = 44
Quantity = 1
Main Jet = 157.5
Pilot Jet = 127.5
Needle/Seat = 2.0
Spring = 95 g with 25 psi popoff
Not sure on screw settings since it's been a while since I tuned it.
- - - - - -
Gas Octane = 93 with a little added race gas for added safety
Altitude = 800ft above sea
Main type of riding = freeride
Would it pass the 10 second WOT test = Yes!!!
Powerband = lots of low end and midrange power(It yanks your arms), my ski isn't setup for high speed so its hard to say about the top end.
Motor type/setup = Ported 61x/61x by HPE with only exhaust port and boost port changed, transfers kept stock due to me being a cheap ass, 35 cc domes @ 180 psi, limited b pipe with bottom screw just cracked, etc. Stock ignition. 144mm pump with nozzle bored to 84mm, stubby cone, and 9/15 hooker prop. May go up a size on the pilot once I get my EPIC setup and installed with an aggressive curve.

 

[dose]

glad I found this thread. I have some good Ideas now for starting points

My problem is that no one is posting jetting for 5-7000' elevation like me
for my ported b piped 701 that is soon getting a wetjet mani and 46sbn I think ill try
120L
150H
20ish pop off
probably rich for my elevation but a safe place to start

 

[Galaitoto]

760 dual 38's. Protec exhaust ( not sure what specific model). My mechanic jetted them at 1.5 N+S, 95 spring,130 mains, 70 pilot. The website for the exhaust said to go 1-1/2 turns on the lows and 2 turns on the highs, so this is what he tuned them to. The thing runs too rich Im thinking, it won't go when wot. It just stumbles forever until I relax the throttle to midway, hit a wake or two, and eventually it gets going

 

[madscientist]

Most are running 75 low and 135 main on dual 38. Sounds like the fuel flow is low and taking time to catch up to demand.

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[Quinc]

760 dual 38's. Protec exhaust ( not sure what specific model). My mechanic jetted them at 1.5 N+S, 95 spring,130 mains, 70 pilot. The website for the exhaust said to go 1-1/2 turns on the lows and 2 turns on the highs, so this is what he tuned them to. The thing runs too rich Im thinking, it won't go when wot. It just stumbles forever until I relax the throttle to midway, hit a wake or two, and eventually it gets going

Turn the screws .5 higher and see if it gets better or worse. (I always start rich) If it gets worse turn them down .25 - .5 at a time to see if gets better.

 

[Galaitoto]

Turn the screws .5 higher and see if it gets better or worse. (I always start rich) If it gets worse turn them down .25 - .5 at a time to see if gets better.

Thanks. Counter clockwise is richer,right? I get confused because I'm thinking airplane terms, I fly cessnas and counter clockwise on the mixture knob is leaner.

 

[madscientist]

Yes. Counter clock is richer

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