Dwell: The ignition dwell time is the length of time that the primary circuit is turned on prior to each cylinder firing. The internal module circuit determines the actual time that the primary circuit is closed (dwell time). Primary circuit dwell time is important because the primary current must flow long enough to allow the magnetic field to build up in the coil. The dwell time is not adjustable because the module determines when the circuit is closed.





layman's terms: Dwell is the amount of time(in rotational degrees) the coil has to charge up before it sends the spark

 

Is the required dwell time set by the coil or the ignitor, CDI, etc. ? In other words, would better coils charge faster, or does the ignition computer limit how fast the coils charge? MSD told me the DIS-4 can't charge the coils fast enough to be used on its own on a rotary.

 

don't *dwell* on it



sorry couldn't resist

 

on our cars, it's the ignitor that controls dwell. To build a "real" race ignition, the only stock parts used would be the crank sensors, everything else would be aftermarket components.

 

What about HKS twin power? Are they any better than the MSD's?

 

twinpower is way easier to install just plug in. it works pretty good too. the MSD's can be more powerful though

 

do you have to regap your spark plugs for the twin power?

 

have you ever seen a rotary plug. the gap is not adjustable

 

hmmm........ never paid any attention to that

 

sure they are, just grind down the four sides with a teeny tiny baby dremel!!!