As you probably know, the very efficient design of the hemispherical combustion chambers
require less total timing than other engines. Taking this into consideration, we calibrate our
Hemi DUI's on a distributor machine so that your mechanical advance and initial timing are
set precisely where it needs to be for optimum performance. Due to space limitations, the
distributor is built without a vacuum advance.
No add-on spark box is required because our DUI coil and high output Dyna-Module produce
a longer duration spark initially. All you have to do is run one hot wire to the DUI (and optional
tach wire) and you're ready to run. Not only does the DUI provide you with a cleaner engine
compartment, but your coil and module are protected from the elements.
With the DUI's more intensive firepower, spark plug gaps can be opened up to .050" - .055".
More importantly, the voltage output does not drop under load. This feature is a great
complement to the hemispherical design.
Craftsmanship is exemplary with the DUI. Both an upper and lower bushing are utilized. This
prevents spark scatter while improving longevity. The unit is polished and lubricated where
necessary. If you need to call us for tech support, provide us with your individual I.D. number
which we engrave on the bottom of your distributor housing.
Whether you are running a new 426 crate engine or an early 426 production Hemi, we can set up a DUI for your application. The
DUI is available in our Street/Strip (7000 rpms), Racing (9000 rpms) and Marine versions.
DIMENSIONS: The Hemi DUI measures 15.5" from the hold down clamp to the top of the cap. The diameter of the
distributor cap is 5 1/4".
Protect your engine from over revving with the DUI Rev Limiter. The D.U.I. Rev Limiter drops one
cylinder at a time very smoothly. This prevents fuel from loading up on the plugs. This also avoids
backfires and engine damage. Set your RPM limit with plug-in modules. A 6000, 7000 and 8000
RPM module is included with the rev limiter. Other RPM increment modules are available separately
if needed. This unit works great with all of our DUI distributors.
Part# 380777 $145.00
Rev Limiter Module Kits - Even Increments
Part# 380-5000, (5000 Series) 5000, 5200, 5400, 5600 & 5800 $39.00
Part# 380-6000, (6000 Series) 6000, 6200, 6400, 6600 & 6800 $39.00
Part# 380-7000, (7000 Series) 7000, 7200, 7400, 7600 & 7800 $39.00
Part# 380-8000, (8000 Series) 8000, 8200, 8400, 8600 & 8800 $39.00
