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Paul,
The individual filters aren't going to work very will, (infact they aren't
going to work at all), without some assistance. The slides open, (to
extract the needles and give you more fuel), as a result of the pressure
differential between the carb inlet and the manifold. By putting the individual
filters on you have greatly reduced that differential, (infact .. any change
in intake resistance will change the behavior of the slides).
The reason you are dying at 4.5K is because you have entered an operating
range that requires more fuel, (peak fuel requirement is at maximum torque and
that is at 6K on a stock Vmax) ..... The slides can't open any further and you
don't get any more fuel so you die .... You can lightly cruise up to 6K
because you are running on your pilot circuits and the little bit of fuel that
is able to sneak around the slide needles that don't have the ability to open
any further. Your current arrangement should at least be very fuel
efficient, (of course if you get run over the ambulance driver is unlikely to
ask you what kind of mileage you were getting).
Dynojet stage 1 and 7 kits both provide light tension slide springs and the
stage 7 kit includes main air jet restrictors that are almost absolutely a
requirement for individual filters, (unless you are very creative).
campbell
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