spottedog Posted December 26, 2011 Report Share Posted December 26, 2011 I need to know what size primary main jet and secondary main jet are used on a Hitachi DCR342 carb. I am setting up a "basket case" Hitachi carb for use on a stock Z24, the jets were gone when I got it so I need the factory jet sizes as a starting point to set this carb up for use. Thanks for any input! Quote Link to comment
spottedog Posted January 14, 2012 Author Report Share Posted January 14, 2012 On a L20B the main would be 104 and 145 secondaries. On my LZ24 (Frankenstein) engine, 140 main and 160 secondary is working well. Yep, I answered my own post :blink: Maybe this will help somebody ? (Correction to my original post, I am pretty sure this Hitachi carb is from a Z22) Quote Link to comment
ggzilla Posted January 14, 2012 Report Share Posted January 14, 2012 yes, the carb will run OK on a wide variety of jets. The factory jets probably aren't the best for performance. But someone should have the 720 factory service manual which lists the jets Nissan used. Quote Link to comment
datzenmike Posted January 14, 2012 Report Share Posted January 14, 2012 '84 720 Z24 non California carb...... Primary 5 spd and auto Standard......... #107 Heavy duty...... #110 4x4................... #111 Secondary 5 spd and auto Standard...........#170 Heavy Duty....... #170 4X4.................... #170 Main Air Bleed Primary .............. #75 Main Air Bleed Secondary ......... #60 Slow Jet Primary ........................... #50 Slow Jet Secondary .................... #100 Quote Link to comment
ggzilla Posted January 15, 2012 Report Share Posted January 15, 2012 Funny how 4x4 is jetted 4 sizes richer than standard. Maybe because of decreased aerodynamics? Quote Link to comment
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