THIS KIT BRINGS A COMPLETELY "CONTAINED WITHIN THE DISTRIBUTOR" APPROACH TO THE ATOMIC 4. THE KIT IS BEING OFFERED WITH JUST THE MODULE, HEAT SINK, BREAKER PLATE AND A COIL OR WITH OTHER OPTIONAL COMPONENTS INCLUDING CAP, ROTOR, SPARKPLUGS OR SPARKPLUG WIRES.
Tired of burned or corroded points, bad condensers, poor starting, idle speed too high--in general, an unreliable ignition system? The Delco distributors supplied with Atomic 4 engines have been the source of countless ignition problems due to the use a conventional breaker point system in a harsh marine environment. Until now, the only means of obtaining reliable operation was constant maintenance and plenty of spare parts.
Well, Electronic Ignition just got a whole lot better with the introduction of the Indigo Electronics "SMART" Ignition Module. This new kit is a "Plug and Play" device that takes all of the tried and proven aspects of the original Crane/FAST XR700 and XR3000 based systems we have offered for 33 years and complements them with a new function … Dwell Angle Management. The foundation of this new kit is the FAST XR-i Module, originally designed some time prior to 2003 by Crane Cams as a high performance and compact version of the XR700 for high horsepower, high compression, high RPM V-8 automotive engines which fits completely within the distributor. Many of these older classic V-8s are now on display in numerous competitions wherein the vehicle must be as much like original as possible especially the engine compartment. The XR-i is a tried and proven performer that will finally break into the 4 cylinder engine market via the Atomic 4 after all these years.
It turns out that those same high performance features play
a key role in solving several on-going issues that we continue to have with the
Atomic 4. Coil failures due to too much current and overheating can be
eliminated with smaller Dwell Angles and a coil with about 3.3ohms internal
resistance. At low engine speeds, a minimum Dwell Angle is all that is needed
to generate a great spark. At higher RPM, it is desirable to have a larger
Dwell Angle to allow the coil to become fully "saturated" for a great
spark. This action does an amazing job of significantly reducing coil operating
temperature and thus extending coil life while producing an excellent spark. We
have recently finished testing and running an XR-i ignition system
installed in a A4 distributor to evaluate the module under real world
conditions. After a 5 hour day of testing at 720 RPM, the 3.5 Ohm coil is at
less than 115 F! An additional benefit of the XR-i module is that it
automatically stops coil current flow if the engine is not running. NO MORE
BURNED UP COILS AND/OR MODULES IF YOU FORGET TO TURN OFF THE IGNITION
SWITCH! This new Module has another exciting feature in that it can
function with many different coils with NO BALLAST RESISTOR
needed! For a great spark, the kit comes with a 3.5 Ohm primary
resistance coil with no need for a ballast resistor. If it becomes necessary to
replace the coil at some point down the road, a coil with 2.5 to 3.5 ohms
internal resistance will work nicely.
Introducing the AT-4D and Hi-Intensity Electronic Retrofit Kits from Indigo Electronics. This kit has been expressly engineered to upgrade the Delco distributor on Atomic 4 engines. Shown below are the original points on the left and the XR-i Module itself on the right mounted on a completely new breaker plate and the breaker plate assembly mounted on a Delco distributor.
A YouTube video of the installation process is available here:(Atomic 4 Electronic Ignition Installation - XR3000) This particular video is of a late model Atomic 4 with a Delco distributor which was already converted to a Pertronix ignition system. The overall process is the same as replacing a points type system. Installation of the XR-i module is very much the same without all of the effort with the Shutter and Optical Trigger..
At the heart of the system is a FAST XR-i Electronic Ignition Module which control the firing of the ignition coil, replacing the conventional breaker points and condenser. As there are no rubbing parts to wear or electrical contacts making and breaking, the timing never changes once initially set and Dwell Angle is managed by the Ignition Module. Ignition problems are gone forever with only sparkplugs requiring replacement as needed. Other features include:
A Complete Retrofit Package Easy two-hour installation
includes:
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Upgrade from your Existing XR700 System- For the
added reliability and peace of mind that the XR-i Module can bring to
your existing system, give us a call (800-428-8569) for special pricing for
existing customers. To make the Upgrade, it is simply a matter of plugging in
the new XR-i Module mounted on its own breaker plate and maybe replacing
your existing coil (and eliminating any Ballast Resistor(s)).
Upgrade from your Existing IGNITOR
(by Pertronix) System - For the added reliability and peace of mind
that the XR-i Module can bring to your existing system, give us a call
(800-428-8569) for special pricing for a retrofit kit to replace your Pertronix
unit. Your existing coil, cap, rotor, sparkplug wires and sparkplugs are all
compatible with the XR-i conversion. If you currently have a Ballast
Resistor, it will no longer be needed.
How to distinguish a Delco distributor from a Prestolite? The Delco was applied after about 1969 and is easy to recognize as the distributor cap is held on with two (2) screws. The cap on the earlier Prestolite distributor is held on with two spring clips.