Jan Wulfsberg Posted March 3, 2002 Share Posted March 3, 2002 My 1700 X-flow with gas flowed head, large valves, forged pistons, 244 cam ,45 Webers etc., supposed to produce 158 bhp @ 7.200 rpm, has the following jetting: Choke: 36mm Main: 135 ET: F16 Air: 160 Idle: 60F6 Pump: 45 Dave Andrews program suggests: Choke: 37mm Main: 150 ET: F9/F16 Air: 190 Idle: 45F9 Pump: 35/40 Any comments on these values? Wulf (Viking) id=red> cool.gif Link to comment Share on other sites More sharing options...
oilyhands Posted March 3, 2002 Share Posted March 3, 2002 The jetting program gives a get you going idea of whats required and will never be 100% accurate for every engine, from your figures the mains look a little lean and the idles look bonkers.. way to rich, this may be to mask a poor progression due to the progression drillings being inadequate. Oily Link to comment Share on other sites More sharing options...
cdg Posted March 4, 2002 Share Posted March 4, 2002 Leave the 36mm chokes in. These are the ideal size for use with the 244 Rally spec. camshaft in a road car. Go any larger and you will certainly lose mid-range torque and power for a possible very (very) small increase at the top end. I speak from experience! Chris. Link to comment Share on other sites More sharing options...
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