Super Jet 62t motor ltd chamber jetting

Location
Pa
easy but cant find a good starting point. theres gotta be other people running this, its a stock 62t motor, dual 38's, i need to jet it for a fp limited chamber. fp wasnt the most helpful, what they gave me was 61x jetting spec, 135main, 70low, 115g spring, stock 1.5n/s, thats 55psi popoff which i thought the goal was 22psi generally??? then for the mod pipe on a 62t motor its all the same but with a 140 main, anyone have a better idea of what jets and spring n/s i should run? maybe how many turns too???? could it be that easy? haha if your running a 62t motor with a ltd chamber please reply!!!
 

piratelife

Frandsen works
Location
In the hood wood
im running the blaster mod chamber on a 62t n my sn and i went up to 140 main and a 80 low.....stock spring and stock needle and seat..works great!!! Im at about 500 ft above sea level
 
Location
Pa
ok thanks, chris/jetmaniac suggested starting with a 135H, 75L, 95g spring, i'll starrt small, thankyou all
 
1.5 n&s / 135m / 70p / stock spring @52-55psi. Low screw 1 out, high 1 1/8 out. when i randomly check the plugs they are blackish dark brownish. WOT plug chops are consistanly light tan. ski feels a little fat on the bottom, just haven't felt like changing jets/springs etc...
 
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Location
Pa
haha he pm'ed me with the suggestion, and yes i know hes got alot of good stuff that should have been stock
 
Location
x-h20
right on i just pulled mine out as well ..im on the same boat but going with 70 lows and stock spring cant wait to fire it up. Random question i chopped up my start/stop switch and all the rest of the gauge wires before noticing that there was two blacks and two reds lol now i dont know which black or red go to the start/stop switch can anyone chime in? im running the raider electrical box.
 
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