Page 11 of NOS Technical Information by Holley Performance Products, Inc.

technical tuning information technical information efi wet dry systems suggested baseline tuning combinations for selected nos systems note all carbureted systems require a minimum flowing fuel pressure of 5.5 6 psi 6-7 psi for fogger systems on v-8s hidden systems extra hp 100 125 150 175 100 125 150 180 210 250 hp hp hp hp hp hp hp hp hp hp jetting n20/fuel fuel octane r+m/2 .047 053 .055 061 .063 071 .073 082 .047 053 .055 061 .063 071 .073 082 .082 091 .093 102 .047 053 .055 061 .063 071 .063 071 .073 082 .082 091 .093 102 .033 037 .038 043 .052 059 .059 065 .065 073 .073 078 .073 082 .082 091 .093 102 .102 110 .120 116 .047 053 .055 061 .063 071 .073 082 .082 091 .093 102 .073 082 .082 091 .093 102 .102 110 .120 116 .052 058 .059 065 .065 073 .073 078 .085 082 92 92 92 105 pump gas pump gas w/octane booster pump gas w/octane booster or 100 racing gas octane racing gas ignition timing super powershot standard to 2° retard 2-4° retard 4-6° retard 6-8° retard 2-4° retard 2-4° retard 4-6° retard 4-6° retard 6-8° retard 8-10° retard standard to 2° retard 2-4° retard 4-6° retard 4-6° retard 4-6° retard 6-8° retard 8-10° retard 2-4° retard 2-4° retard 4-6° retard 4-6° retard 6-8° retard 8-10° retard 4-6° retard 6-8° retard 8-10° retard 10-12° retard 12° retard 2-4° retard 2-4° retard 4-6° retard 4-6° retard 6-8° retard 8-10° retard 4-6° retard 6-8° retard 8-10° retard 10-12° retard 12° retard 4-6° retard 6-8° retard 8-10° retard 10-12° retard 12° retard spark plug heat range standard std to 1 step colder 1 to 2 steps colder 2 to 3 steps colder standard std to 1 step colder 1 to 2 steps colder 2 to 3 steps colder 3 to 4 steps colder 3 to 4 steps colder standard std to 1 step colder 1 to 2 steps colder 1 2 3 3 to to to to 2 3 4 4 steps steps steps steps colder colder colder colder supercharger turbo systems plate systems direct port systems 92 pump gas 92 pump gas w/octane booster 100 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane .74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas 92 pump gas 92 pump gas w/octane booster 92 pump gas w/octane booster or 100 racing gas cheater system powersports systems 100 hp 125 hp 150 hp 150 180 210 250 100 125 150 175 200 250 hp hp hp hp hp hp hp hp hp hp dual shot cheater system stage 1 solenoids jets 100 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane 74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas 92 pump gas 92 pump gas w/octane booster 92 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane .74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas 92 pump gas w/octane booster or 100 racing gas 92 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane .74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas 92 pump gas w/octane booster or 100 racing gas 92 pump gas w/octane booster or 100 racing gas 100 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane .74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas 92 pump gas w/octane booster or 100 racing gas 92 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane .74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas dual shot cheater system stage 2 multiple carburetor cheater system nitrous controllers electrical components standard std to 1 step colder 1 to 2 steps colder 2 to 3 steps colder 3 to 4 steps colder 3 to 4 steps colder 1 1 2 3 3 1 1 1 2 3 3 1 1 2 3 3 1 1 2 3 3 to to to to to to to to to to to to to to to to to to to to to 2 2 3 4 4 2 2 2 3 4 4 2 2 3 4 4 2 2 3 4 4 steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps steps colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder colder components accessories plates throttle bodies 175 hp 225 hp 275 hp 325 hp 350 hp 100 hp 125 hp 150 hp 180 hp 210 hp 250 hp 200 hp 225 hp 275 hp 325 hp 350 hp 200 hp 225 hp 275 hp 325 hp 350 hp big shot system 2-stage big shot system stage 1 distribution blocks fittings hoses tubing nozzles 2-stage big shot system stage 2 fuel pumps regulators gauges multiple carburetor big shot system 92 pump gas w/octane booster or 100 racing gas 92 pump gas w/octane booster or 100 racing gas 105 octane racing gas 110 octane .74 or higher specific gravity racing gas 110 octane .74 or higher specific gravity racing gas part index tools merchandising 12 www.nosnitrous.com

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