Engine


J.E.DEVELOPMENTS
CUSTOMER Gary Lumsden IGNITION at IDLE 12
ENGINE NUMBER 3912035 IGNITION at 4000 rpm. 34
CAPACITY 3991cc CAMSHAFT H234
BORE 94.5mm CAM TIMING 107
STROKE 71.12mm VALVE CLEARANCE(COLD) HYD.
FUEL SYSTEM 4 x 48 IDF Webers INLET VALVE 1.63″
CHOKES 38mm EXHAUST VALVE 1.40″
EM. MAIN & AIR F2   150   180 SPARK PLUGS NGK B7ECS
COMP. RATIO 10.5:1 OIL PUMP BELT N/A
EXHAUST SYSTEM Test POLY VEE BELT 6PK1035
INLET TYPE Short Down Draft
TORQUE READING RPM BHP LBS/FT FUEL BMEP
PRESS.
154.5 1080 32.59 158.42 3.50 100.58
186.6 1571 57.26 191.34 3.50 121.48
193.6 2079 78.61 198.51 3.50 126.04
170.4 2530 84.20 174.72 3.50 110.94
217.6 3086 131.15 223.12 3.50 141.67
247.2 3598 173.71 253.47 3.50 160.94
267.7 4039 211.18 274.49 3.50 174.28
260.6 4547 231.43 267.21 3.50 169.66
266.1 5058 262.88 272.85 3.50 173.24
256.2 5522 276.31 262.70 3.50 166.80
252.8 6056 299.01 259.22 3.50 164.58
234.8 6554 300.56 240.76 3.50 152.86
BARO, READING 29.9
AIR TEMPERATURE 86
ENGINE CAPACITY 3.9
CORRECTION FACTOR 1.025