Frequently Asked Questions
DYNA 2000-HD
Q. Will my stock pickup work in single fire mode with the Dyna
2000? How?
Q. What type of spark plug wires should I use with the Dyna
2000 ignition?
Q. Should I use the VOES on my late model Harley with the Dyna
2000?
Q. What is the difference between Single Fire and Dual Fire?
What are the benefits?
Q. How do I hook up my tach to the Dyna 2000?
Q. What coil should I use with the Dyna 2000?
DYNA S
Q. Why does my new single fire Dyna S have two red wires while my
old one has only one?
Q. Where do the black and white wires go?
Q. Will the Dyna S work in early Panhead applications with reverse
rotation distributors?
Q. Where do the blue and white wires connect on the DS6-1 dual
fire Dyna S
Q. Why does Dynatek recommend 5 ohm coils for street use and 3 ohm
coils for racing?
Q. What should I set my spark plug gaps to?
Q. Why does my Dyna S spark continuously when I am charging the
battery?
DYNA 2000-HD
Q. Will my stock pickup work in single fire mode with the
Dyna 2000? How?
A. Yes, the stock Harley-Davidson pickup will work perfectly with the Dyna 2000
in single fire applications. Because of the uneven firing angle of the Harley
engine, the microprocessor in the Dyna 2000 is able to separate the firing
pulses below idle, resulting in a true single fire ignition.
Q. What type of spark plug wires should I use with the Dyna 2000 ignition?
A. Any type of carbon suppression core spark plug wires should be compatible
with the Dyna 2000. Do not use solid core or spiral core type plug wires. The
factory Harley wires should work fine.
Q. Should I use the VOES on my late model Harley with the Dyna 2000?
A. Most stock or mildly modified Harleys will benefit from the use of the VOES.
The way the system works is; at part throttle or cruising speeds, when engine
vacuum is high, the switch is closed and the ignition is at full advance by 1500
rpm. This results in increased fuel economy and improved part throttle drivability.
When under heavy acceleration, and engine vacuum is low, the switch opens,
causing the Dyna 2000 to follow a slower advance curve. This helps to reduce
detonation under heavy loads. More heavily modified motors can benefit from
using the VOES switch wires in the optional modes outlined in the instruction
manual.
Q. What is the difference between Single Fire and Dual
Fire? What are the benefits?
A. Dual fire ignition systems fire both spark plugs from a single coil at the
same time. The majority of the spark energy goes to the cylinder under
compression while a small portion goes to the cylinder on the exhaust stroke
causing a small wasted spark. Single fire ignitions separate the firing pulses,
only firing the cylinder under compression. The main advantage of dual fire
systems is simplicity and low cost. The advantage of single fire systems are
smoother engine operation and the elimination of the popping that sometimes
occurs when long duration camshafts are used. There is no horsepower advantage
with single fire ignition systems.
Q. How do I hook up my tach to the Dyna 2000?
A. In dual fire installations, you may use the factory tach connection or you
can use the tach output provided with the Dyna 2000-HD1E. For single fire
applications, you must use the Dyna 2000 tach output for correct single fire
operation.
Q. What coil should I use with the Dyna 2000?
A. For all dual fire and single fire applications, you must use coils that have
a primary resistance of 2.5 to 3.5 ohms.
DYNA S
Q. Why does my new single fire Dyna S have two red wires
while my old one has only one?
A. The red wires provide +12 volts to the modules (pickups) on the Dyna S. To
simplify manufacturing, Dynatek switched to the two wire system. Simply twist
the two red wires together and connect them to the +12 volt side of the coils.
Q. Where do the black and white wires go?
A. The white wire connects to the negative (-) side of the rear cylinder coil,
the black wire connects to the negative side of the front cylinder coil.
Q. Will the Dyna S work in early Panhead applications with reverse
rotation distributors?
A. Yes the Dyna S works in these applications extremely well. Just remember that
in these reverse rotation appplications that the front cylinder becomes the rear
for ignition purposes. When using the DS6-2 single fire, simply reverse the
black and white wires. With the DS6-1 dual fire, simply use the rear cylinder
timing marks. Some modification to the mounting plate may be necessary for
proper clearance.
Q. Where do the blue and white wires connect on the DS6-1 dual fire
Dyna S
A. The white wire connects to the +12 volt side of the coil, the blue wire
connects to the negative (-) side of the coil.
Q. Why does Dynatek recommend 5 ohm coils for street use and 3 ohm
coils for racing?
A. The resistance of the coil determines how much current flows through the
ignition system. The 3 ohm coils, because of their lower resistance, pass more
current and therefore run warmer than the 5 ohm coils. If the coils are located
where they receive good airflow and are away from engine or exhaust heat, then 3
ohm coils will generally give reliable service on the street. However, when the
coils are located under the tank, between the cylinders, or close to the engine
with a tight fitting cover, 3 ohm coils may overheat. This is most likely to
occur under ³worst case conditions², such as creeping along in traffic on a
hot day in Arizona (this isnıt so great for an air cooled engine either!).
Rather than get into the specifics of every application we make the general
recommendation - 5 ohm for street, 3 ohm for race.
Q. What should I set my spark plug gaps to?
A. The gap settings listed below can be used as a starting point to obtain
satisfactory performance with our ignition system. Any benefit from running
larger or smaller gaps will need to be determined by experimenting with your
particular engine combination.
Single Fire - Single Plug: .035 to .040
Single Fire - Dual Plug: .022 to .025
Dual Fire - Single Plug: .035 to .040
Dual Fire - Dual Plug: .035 to .040 - When wired so each coil fires a plug in
each cylinder.
Q. Why does my Dyna S spark continuously when I am charging the
battery?
A. Battery chargers constantly switch between high and low voltage. The Dyna S
sees this as the ignition being switched on and off resulting in the constant
spark described above.
All parts sold by MPS are for off road closed course use. They are not intended for use on public streets or highways.
Motorcycle Performance Specialties
5350 McIntosh Point #132 - Sanford, Florida - 32773
Phone: (407)330-9727 - Fax: (407) 322-8632
Sales E-Mail: sales@mpsracing.com
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