best racing ign system.
63 dart dirt track circle track stock car. 360 2bbl. race duration is ~30 minutes. 6200 RPM limiter. I have a recurved OE electronic dist. what module & coil would you guys recommend? I can use a regular flat 4 pin module or an HEI module that mounts under the dist. I think I can get by with an externally mounted Ecoil or if not then a regular round coil. thank you for your time. I want the best!. RR
The most important thing will be the curves in the distributor. You're going to heat soak the engine in ways that a drag car never sees, and a street car only sees when hauling heavy loads in the mountains. It will not need or want the mechanical timing to be as advanced in the mid to top end as a drag racer.
Using vacuum advance potentially will help with engine temperatures and matching the part throttle as well as the full throttle engine preferences for spark timing.
The next most important thing will be survival. In no particular order:
* The wires need to be strain relieved so there's no tension on the connections, and supported so they aren't moving around.
* If you are going to go electronic, then find an ECU that will hold up under 40 minutes of heat and stress
and is easily replaced. Assume you will need a backup because there's really know way to be 100% sure of survival in this siutation. The truth is not many people running circle track or even road course with these so there's not a large pool of info. (Amusingly I've noticed on some Brand X forums, Chrysler systems are prefered.) These days what you want on a Chrysler type ECU is a well attached heat sink for the transistor.
IMO you do NOT need an ECU designed for very high rpm of the sort that was used for NHRA class racing or NASCAR. 6200 rpm max says to me you will be coming off corners at considerably less than that.
* Pick an ECU and coil that seem to match up with the rpm your looking at. If you use a stock oriented ECU its not going to increase dwell at the higher rpms, so a coil that has windings that saturate quicker possibly could help. There are a variety of windings in epoxy filled cylinders ad swell as oil filled cylinders, as well as the E-core coils. The bottom line will be ECU, Coil, and Resistor work together.
* I'm going to suggest avoiding the FBO and Revenator boxes unless you want to commit to them fully. Going from memory, Revenator uses the previous spark event to adjust the timing of the next and Don's box has a compensation built in to try to compensate for the slew rate. This means that the spark timing on each of these will be different than each other, and different than a box without electronic compensation. Swap from to the other and you'll drive yourself nuts. Maybe contact one of them if you really like them, or E-berger with his more normal ECU, and see if one will back your effort in turn for some publicity.
