Recent laboratory testing revealed the latest design of the Stewart Stage 4 DRV-8 Chevrolet Small Block water pump compared to the pump our leading competitor offers:
- 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:
Flow in GPM (Gallons Per Minute) | ||
RPM | Competitors Pump | Stewart Stage 1 |
1000 | 17 | 18 |
1500 | 25 | 32 |
2000 | 34 | 42 |
2500 | 42 | 55 |
3000 | 51 | 65 |
3500 | 59 | 77 |
4000 | 68 | 90 |
4500 | 76 | 101 |
5000 | 85 | 112 |
5500 | 93 | 122 |
6000 | 102 | 132 |
6500 | 110 | 138 |
7000 | 119 | 148 |
7500 | 127 | 157 |
8000 | 139 | 158 |
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)
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 |
Power Requirement in Horsepower (Gallons Per Minute) |
||
GPM | 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 |