ZEX 82030, Installation Instructions Manual

this, the nitrous tune-up on a mass-air meter equipped engine is set-up to flow more fuel than an equivalent tune-

up for a non mass-air meter equipped engine. 

Jet chart for engines NOT using a mass-air meter (i.e. speed-density): 

50hp  75hp   100hp   125hp   150hp   175hp   200hp 

Nitrous (950psi)

Nozzle Jet 

  26 

 26 

  26 

     54         54         54           54 

Distribution Block Jet  

  32 

 43 

  57 

     56        67         76         105 

Fuel (40psi)

Nozzle Jet 

 19 

  19 

   19 

     19          19          19         19 

Distribution Block Jet  

 19 

  21 

   24 

     28          33          38         46 

Ignition Retard (deg.)

  2 

   4 

    6 

      8            10          12         14 

Jet chart for engines using a mass-air meter: 

50hp  75hp   100hp   125hp   150hp   175hp   200hp 

Nitrous (950psi)

Nozzle Jet 

 26 

  26 

   26 

     54        54         54         54 

Distribution Block Jet  

 32 

  43 

   57 

     56       67        76        105 

Fuel (40psi)

Nozzle Jet 

19 

  19 

   19 

     19        19         21         21 

Distribution Block Jet  

21 

  26 

   33 

     43        57         57         76 

Ignition Retard (deg.)

 2 

   4 

    6 

       8         10         12         14 

Normally aspirated tuning requirements: 

For engines less than 10.75-1 compression ratio, using nitrous system settings of 100hp or less, pump premium 

fuel is required for safe operation of your ZEX Direct Port Nitrous System.  For engines with 10.75-1 

compression ratio or greater, using nitrous system settings higher than 100hp, high octane racing fuel is required 

for safe operation of your ZEX Direct Port Nitrous System.  Nitrous system fuel pressure must be at least 40psi