Constant or Ported Vacuum Source for Distributors? ...AGAIN!
I agree. The various vacuum cans are confusing and poorly documented. Guys who fool with their engines would be better served with an electronic spark controller, then they could tweak spark timing vs (rpm & MAP) to their hearts content. There was one named RapidGator which came and went. I expect the developer got a busier day job. I recall Kit was also working on one. One can do so with a Holley Commander 950, and perhaps others fuel injection controllers, if you use a GM 8-pin HEI module. A bit clumsy if not using the EFI part, but you can find the controller alone cheap on ebay, and could wire your own cable w/ just the wires needed for spark control. Can also add feedback O2 (wideband is best).
I completed my prototype, it works great. Coil near plug, multi-spark, full electronice advance, tune real time, real time timing readout, data logging, interfaces with smart phones tablets and notebooks.
The greatest problem, was revision of starter, and alternator power circuits, for clean ECU feed. That work while not difficult, or expensive, would be a show stopper. There are perhaps a hundred + posts about alternator issues, where bad grounds, poor bulkhead connectors .... they go on for pages. Steering people to fix, is well beyond my patience.
Then the major tuning leap, there are those that think no advance, like a lawn mower is the key to drag racing. Vacuum advance, not requried, or only manifold source. Much it is about knowing what is wrong, when timing is off... Leaving off +, - , things like difficult starting, poor throttle response, pinging, idle speed runaway, poor economy, over heating, stinky .... herky jerky coast down. Thinking running like a beast, is a beast... A well tuned car is smooth, reponsive, economical, yet max power, optimal perfomance, for all RPM, and load conditions.
