Ignition Modules

[JTesta1966 at aol.com]

In a message dated 7/28/99 9:23:22 AM Eastern Daylight Time, 
frederic at xephic.dynip.com writes:

<< So, its how long the points are closed, which controls how the ignition
 coil charges and collapses magnetically.  But you have DIS, so I would
 imaging the principle is the same, but I'm not so sure that its quite
 the same thing. >>

Well, its the dwell that allows the coil to build up to saturation. In a 
points car, you equate too long dwell to slightly advancwed timing (due to 
the fact the dist cam opens the points, collpsing the coils field thus 
creating spark) by the fact the points are opening earlier (sooner) in 
relation to TDC, same for short a dwell (retarded). maybe I got em backwards, 
but you get the jist. Now, equating this to a DIS car, where the dist points 
cam is done "electronically" I can see how the manufaturer could change this 
dwell, which as a matter of fact, might be changed according to driving 
conditions. Maybe a longer dwell to let the coil build up for extra energy as 
in idle or cruise, where'd you want a hotter spark, and shorter for less 
spark on decel maybe...anyway, point is, if dwell *IS* different from OE to 
aftermarket, that could cause performance probs. *IF* its different, and I 
dont know for sure.


JIm