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| PORSCHE 924 TEST DATE: 7-15-98 CASTING #: 373 TEST PRESSURE: 28" H20 | R & R PERFORMANCE
8420 SUNSET ROAD
SPRING LAKE PARK, MN 55432 | | LIFT | .100 | .200 | .300 | .400 | .500 | .600 | AVERAGES (.200 to .500) | | INTAKE | VALVE DIA.: 1.570 | STEM DIA. 0.353 | AREA: 1.838 | | INTAKE TEST 1 | | STOCK | | RANGE | 72 | 151 | 151 | 300 | 300 | 300 | | | PERCENT | 71.6 | 59.5 | 89.4 | 50 | 50.5 | 51 | | CFM OF FLOW | 52 | 90 | 135 | 150 | 152 | 153 | 132 CFM | | INTAKE TEST 2 | | STREET STRIP PORT | | RANGE | 72 | 151 | 151 | 300 | 300 | 300 | | | PERCENT | 69.5 | 60 | 91 | 54 | 57.5 | 60.5 | | CFM OF FLOW | 52 | 90 | 135 | 150 | 152 | 153 | 132 CFM | | % INCREASE | -3 | 1 | 2 | 8 | 14 | 19 | 7 % |
| EXHAUST | VALVE DIA.: 1.295 | STEM DIA. 0.3532 | AREA: 1.220 | | EXHAUST TEST 1 | | STOCK | | RANGE | 78 | 78 | 158 | 158 | 158 | 158 | | | PERCENT | 53 | 92.8 | 66.5 | 76 | 79.8 | 81.4 | | CFM OF FLOW | 41 | 72 | 105 | 120 | 126 | 129 | 106 CFM | | % OF INTAKE | 80 | 81 | 78 | 80 | 83 | 84 | 80 % | | EXHAUST TEST 2 | | STREET STRIP PORT | | RANGE | 78 | 78 | 158 | 158 | 158 | 158 | | | PERCENT | 52 | 92 | 68 | 80 | 86 | 89.6 | | | CFM OF FLOW | 41 | 72 | 107 | 126 | 136 | 142 | 110 CFM | | % OF INTAKE | 81 | 79 | 78 | 78 | 79 | 78 | 78 % | | % INCREASE | -2 | -1 | 2 | 5 | 8 | 10 | 4 % | CFM OF FLOW: (CUBIC FEET PER MINUTE)
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Sponsored by: BMC British Automobile |
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