Super Jet who is running a sbn 46?

[550headache]

have a few mint sbn 46's laying around. i'd like to put it on my fx1 and use the sbn44 that's on it now for my 650 in my square nose. any jetting baselines for my 61x with pro tec pipe. don't want to spend a fortune on jets and a ton of time wrenching. summers end is coming up quick here!

 

[special fx]

Don't know about the Pro-tec pipe, but with a b-pipe i run my 46 with 120 low, 140 high, and 12lbs of pop-off.

 

[ProSouth]

Don't know about the Pro-tec pipe, but with a b-pipe i run my 46 with 120 low, 140 high, and 12lbs of pop-off.

im fine tuning mine now, but im about to go to a 130l/150h 2.0 needle and seat, but i run about 28psi pop off

 

[tor*p*do]

I run a 61x ported 185 psi motor with a 46 and it hits hard
using FPP manifold& pipe with C4 chamber
its just a hair rich, but reliable and runs strong.
specs from my spreadsheet below

46 mm Mikuni
120 Lo
150 Hi
2.5 n&s

80 Grams
1.5 turns Lo
1.5 turns Hi

 

[ProSouth]

^^ whats your popoff wind up at with that 80g spring?

 

[tor*p*do]

never measured it, my engine builder/port guy recommended that combo
so I put it together and it runs so good I haven't need to pull it back apart to measure p/o

 

[ProSouth]

i imagine its kinda low, im going to lower mine, its running pretty damn lean.

 

[tor*p*do]

mine is rich which I prefer
Still perfect 185 psi in both holes after 2 1/2 seasons
I may have tweaked back the low 1/4 turn and not recorded it
YMMV

 

[ProSouth]

i just went to 20psi pop off and 130L/150H. going to see how that runs. might try to get out a couple hours today

 

[mrgoodwrench]

Well prosouth where did you end up ?