Hi I have a Ford Anglia with a 1700 xflow full race engine that I’ll race this seson in the Portuguese Championship.
After some tests on the track the car has a “dip” in the mid range that is very noticible it simple wont progress until you nurse the trothle...
This is what the dyno graph when it was build looks like - 187.7hp at 7300rpm:
This is the car on the dyno:
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And the graph of the dyno - 185.8hp and 192nm:
This was with Weber 50 DCO
46 Venturi/Choke
190 Main jet
F7 Emulsion tube
170 Air jet
60F8 Idle jet
100 Pump exaust valve
45 Pump jet
2.50 Needle valve
The engine was too rich all the way but when we take fuel or add air the engine loose power.
At this stage we thought the only solucion was to reduce the venturis/chokes to 42mm so we try with Weber 48ˋs with 42mm venturis we also reduce the idle jet to 50F8 and the configuration that was best was this:
42 Venturi/Choke
190 Main jet
F7 Emulsion tube
170 Air jet
50F8 Idle jet
100 Pump exaust valve
45 Pump jet
2.50 Needle valve
We try to reduce the main jet and increase the air but with the same results in the middle and worst at the top...
The engine is still too rich all the way but what puzzle me is the middle that is worst than before with the 46mm ventures???
Any advice on the jetting this engine?
Regards
JC
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