• 93% more pressure @ 6,000 RPM
• 39% more flow @ 6,000 RPM
• 60% less horsepower loss @ 100 GPM

Stewart Stage 1 water pumps, which cost only $69.95 mail order, also out perform our leading competitor. The same laboratory tests proved the Stewart Stage 1 Chevrolet Small Block water pump compared to the pump our leading competitor offers:

• 67% more pressure @ 6,000 RPM
• 29% more flow @ 6,000 RPM
• 47% less horsepower loss @ 100 GPM

Stewart water pumps have a 1 year guarantee unlike our leading competitor which have no advertised quarantee!

Below is a comparison of the Stewart Stage 1 water pump (Part No. 12105) compared to our leading competitors pump under identical conditions:

Stewart Stage 4 DRV-8 3rd design for Chevrolet Small Block Winston Cup compared to our leading competitors pump under identical conditions:

Conditions: 200° F, 20 PSI System Pressure at Pump Inlet, Restriction Equal to 20 PSI at 100 GPM, (full size hoses, no restrictors, 2 row single pass radiator, -12 AN lines from rear of heads)

Flow in GPM (Gallons Per Minute) RPM Competitor Stewart DRV-8 1500 25 34 2000 34 47 2500 42 55 3000 51 69 3500 59 81 4000 68 92 4500 76 106 5000 85 117 5500 93 132 6000 102 142 6500 110 154 7000 119 162 7500 127 174 8000 136 180

Power Requirement in Horsepower (Gallons Per Minute) GPM Competitor Stewart DRV-8 10 .03 .02 20 .11 .08 30 .29 .17 40 .69 .30 50 .96 .47 60 1.65 .84 70 2.44 1.11 80 3.66 1.63 90 5.62 2.26 100 7.20 2.90 110 9.4 3.51 120 11.49 4.61 130 14.30 5.60 140 N/A 7.20 150 N/A 8.80 160 N/A 11.00 170 N/A 13.09

Next Tip - Special Applications - Dirt Race Cars, Street Rods and Pavement/Road Racing