Jetting on 416

[Brad]

416 12-5-1 piston, hmf full system, port+polish, k&n, no airbox lid, sparks cam need help on what your jetted at (w/ a stock carb) and simelar mods, please help quick

[cals400ex]

i would try around a 165-168 for starters on the mainjet. you will want to move the needle clip down to the 4th position from the top. you will also want a 42 or 45 pilot too probably.

[RAPTORAZ]

Originally posted by cals400ex
i would try around a 165-168 for starters on the mainjet. you will want to move the needle clip down to the 4th position from the top. you will also want a 42 or 45 pilot too probably.


That should get you real close. I'd probably go with a 175 main though. Assuming you're somewhere near sea level. And have a K&N with a well breathing airbox(lots of holes, lid gone).

[BIGRED400]

416 JE 11:1, Hot Cams Stage 2, No Lid,170 Main,42 Pilot,3rd clip down, 3 1/2 turns out on screw in Fla. at sea level.........she cranks:D

[Brad]

ok, hmf gave me a 175 i think ill try that for starters i just needed a ballpark figure, thanx everyone who replied

[chucked]

Originally posted by cals400ex
i would try around a 165-168 for starters on the mainjet. you will want to move the needle clip down to the 4th position from the top. you will also want a 42 or 45 pilot too probably.

move the clip DOWN????

[Spikers400]

Yea down, that would richen it up. With my hmf and lid off im on the very last clip.

[chucked]

Originally posted by Spikers400
Yea down, that would richen it up. With my hmf and lid off im on the very last clip.

o im thinking move the needle down....

[cals400ex]

yes, moving the clip down actualy raises the needle 1 position.