Demon Fuel Systems 1563010VE - Manual (Page 17)

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350 CID Engine 402 CID Engine
Spring Color RPM to Open RPM at Full Open RPM to Open RPM at Full Open
White --- --- --- ---
Yellow (short spring) 1620 5680 1410 4960
Yellow 1635 5750 1420 5020
Purple 1915 6950 1680 6050
Plain (std. spring) 2240 8160 1960 7130
Brown 2710 8750 2380 7650
Black 2720 Not fully open at max air flow 2390 Not fully open at max air flow
FORD KICK-DOWN LINKAGE
All new manufactured Speed Demon
™ Carburetors come with a Ford kick-down linkage. If running a
Ford automatic and the kickdown linkage is needed, a spring and perch kit (P/N 421445) is required.
Note spring mounting location on the linkage.
NOTE:
Speed Demon™ Carburetors will not work with a Ford AOD transmission.
Figure 27
For further questions, please contact our technical department at 1-270-901-3346.