Competitors Comparison

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

 


 

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