Quote:
Originally Posted by 85HOT-T
I by no means is an engine expert but what I would see happening if the stoke misfired and dumps into the exhaust the heat in the exhaust manifold pipes would ignite that mixture and raise egts, which brings us to the previous post of lower egts. If you ask me what I have logged in my head from this topic is high rpm misfire. That is the concern with the stock DIS. Now what I have to bring to the table is if RJC's dual coil system has two coils, that means it should handle high rpms no prob. Only reason I bring his up is the debate of the stock system. So now the question is will dual coils do it, is the distributor setup oboslete now?
|
Regardless of what type system it is, it must be capable of putting out the initial voltage level to jump the spark gap in extreme cylinder conditions. You could be using 6 coils per cylinder and if the necessary voltage level isn't there, no spark. The answer is making sure that the system you use has the reserve voltage capacity to do the job you're demanding from it.
The distributor is just a tool used to distribute the voltage to the plug. It's perfectly fine to do this without a distributor.
If I were going to bother with converting to COP, at the very least I would keep the secondary wires as short as possible. The real advantage of COP would be using no secondary wire at all. The coil directly on the plug. In that situation you've vastly eliminated the chance for secondary voltage leaks. Without that worry, you can now pump up the secondary voltage level without worrying about the previous problems I mentioned. If you use COP with long secondary wiring, you've restricted your secondary ignition voltage level to the limit of what the secondary wiring can handle. That would be the same level as most any other high performance ignition system. That would be a waste of time to me.
The secondary wires are the weak spot that limits how much kv level you can get away with in your secondary system. That is what limits me with my particular w/s system. The system is quite capable of putting out some massive kv, but then I just end up blowing it out the wires all over the place. Cross firing then becomes a big problem. That is why I decrease my spark gap with my system. To keep kv levels down to what the secondary wires will allow me to get away with. Also keeps from straining the coils. Longer coil life.
When you start pumping up your secondary kv, a single coil is going to see a lot of heat. More coils allows this heat generation to be shared. So less heat per coil. More coil life.