Octane Boost Requirements

WARNING: your actual octane is 3.5 points less than marked at the gas pump.

Ounces of Quality Octane Boost* Supercharged Engine Size
4.6 / 5.4 / 5.8		 Max RWHP per C.I. Octane Target Actual Octane Pump Rating E85% added Increases Octane to Gallons of gas per 1 gallon of E85 Air Fuel Lean Inj. Size Added Plug Heat / Gap Total Spark
RWHP 410 / 510 / 540 1.5 86 86 89 TR6      37 17
RWHP 440 / 540 / 570 1.6 88 88 91 TR6      36 20
RWHP 475 / 570 / 600 1.7 90 90 93 TR6      35 23
16 RWHP 500 / 600 /630 1.8 91 90 93 10% 91 9 + 1 = 10% 4 4# TR8      32 23
16 RWHP 535 / 630 / 667 1.9 92 90 93 17% 92 5 + 1 = 17% 10 10# TR8      31 23
16 RWHP 562 / 662 / 702 2 93 90 93 20% 93 4 + 1 = 20% 12 12# TR8      30 24
32 RWHP 590 / 695 / 737 2.1 94 90 93 25% 94 3 + 1 = 25% 15 15# TR8      29 24
32 RWHP 618 / 728 / 772 2.2 96 90 93 35% 96 2 + 1 = 35% 18 18# TR8      28 25
32 RWHP 646 / 761 / 807 2.3 98 90 93 50% 98 1 + 1 = 50% 22 22# TR8      27 26
64 RWHP 675 / 795 / 842 2.4 106 90 93 100% 106 0 + 1 = 100% 27 27# TR8      26 27
64 RWHP 702 / 825 / 885 2.5 106 TR8      25 23
64 RWHP 730 / 858 / 920 2.6 106 TR8      24 23

* Ounces of octane boost should be added to every 1/2 tank of gas.

Example calculation to formulate a percentage of E85 you wish to run
25% of E85 = Gas Pumped x .25 6.5 gal. gas x.25 = 1.625 gal. of E85 added or 25%
50% of E85 = Gas Pumped x .5 6.5 gal. gas x.5 gal of E85 added or 50%

Important: Leave room in tank for E85 added
Run air fuel gauge in car, look for part throttle at 14-14.5 and WOT at 11.5-12
Increasing fuel pressure 10+ # will help in tuning an E85 mix
When running E85 50 to 100% add larger fuel rails and a stainless fuel filter or filter delete tube

Example Calculation for RWHP for C.I.
590 RWHP/by 281 C.I. = 2.1 C.I. per RWHP
Graph shows a need of 94 octane to safely run this engine at speed