anybody try this Accel coil system?

[reddevilmedic]

is this what we (1st genners) have? a CDI system? anybody try these?http://store.prestoliteperformance.com/accel-mc/metric-motorcycle/universal-super-coils-black.html.

[bkuhr]

NO, we do not have CDI (Capacative discharge) on 1st gens

 

heres a good article I found explaining the difference

http://www.jetav8r.com/Vision/IgnitionFAQ.html#a7p2

[reddevilmedic]

thank you!

[jasonm.]

we do not have CDI..capacitor discharge ignitions. And that link is 2 coils w/2 outputs each, for an In-line 4 cylinder. Which only need 2 coils. We have 4 coils because of the V-4 design. Our coils are 3 ohms....with one output each.

[dingy]

we do not have CDI..capacitor discharge ignitions. And that link is 2 coils w/2 outputs each, for an In-line 4 cylinder. Which only need 2 coils. We have 4 coils because of the V-4 design. Our coils are 3 ohms....with one output each.

 

Actually, with the 90-93 bikes, I'm not thinking of a reason that they could not be run with 2 coils. This would require a way to combined 2 spark plug wires at each coil. The 90-93's use a wasted spark system where every plug fires every revolution This would seem to require that 2 coils are firing at the same instant. Not saying this would be a great idea, but it seems possible.

All the VMax'x & the Venture box's are TCI units. The primary change in 1990 on both models was the went to a fully digital type circuitry with one pickup coil. With the 85-89 VMax's (& the 83-89 Ventures) had an analog based, but still solid state style system where there were actually 4 independent circuits in the TCI, one for each cylinder. A TCI based system normally is energized, the circuit is interrupted by the TCI at the instant of firing, which causes the coils field to collapse thus inducing a surge into the coil secondary and plug fires. A CDI system is basically opposite, in that it is normally deenergized and at instant of firing the coil is powered up & the surge builds the field in the coil causing the secondary to be energized and fire.

 

The firing/timing mechanism is fairly straightforward on the 4 pickup coil units. With two inducers on the flywheel, it would be easy to determine precise timing for each of the 4 cylinders

 

With one pickup coil and one inducer on the rotor, it is seemingly a little trickier. The first thing is this system forces the wasted spark concept where every plug fires every revolution. What is a little more complex is the difference in firing of the the firing order. 1-3-2-4. The single pickup may trigger #1 & #2 on the leading edge of the inducer passing the pickup coil, then fire #3 & #4 when the inducer clears the pickup coil and the field collapses, but this is a SWAG, (Sophisticated Wild Ass Guess).

 

Gary

 

[bkuhr]

Actually, with the 90-93 bikes, I'm not thinking of a reason that they could not be run with 2 coils. This would require a way to combined 2 spark plug wires at each coil. The 90-93's use a wasted spark system where every plug fires every revolution This would seem to require that 2 coils are firing at the same instant. Not saying this would be a great idea, but it seems possible.

 

All the VMax'x & the Venture box's are TCI units. The primary change in 1990 on both models was the went to a fully digital type circuitry with one pickup coil. With the 85-89 VMax's (& the 83-89 Ventures) had an analog based, but still solid state style system where there were actually 4 independent circuits in the TCI, one for each cylinder. A TCI based system normally is energized, the circuit is interrupted by the TCI at the instant of firing, which causes the coils field to collapse thus inducing a surge into the coil secondary and plug fires. A CDI system is basically opposite, in that it is normally deenergized and at instant of firing the coil is powered up & the surge builds the field in the coil causing the secondary to be energized and fire.

 

The firing/timing mechanism is fairly straightforward on the 4 pickup coil units. With two inducers on the flywheel, it would be easy to determine precise timing for each of the 4 cylinders

 

With one pickup coil and one inducer on the rotor, it is seemingly a little trickier. The first thing is this system forces the wasted spark concept where every plug fires every revolution. What is a little more complex is the difference in firing of the the firing order. 1-3-2-4. The single pickup may trigger #1 & #2 on the leading edge of the inducer passing the pickup coil, then fire #3 & #4 when the inducer clears the pickup coil and the field collapses, but this is a SWAG, (Sophisticated Wild Ass Guess).

 

Gary

 

 

While WAGing it, at least on the 83's, I would like to add, that the cylinders timing is NOT symetrical, meaning that they do not fire at equal intervals between cylinders. If you recall setting of the cams and chain the timing procedure- too lasy to look it back up, TDC is not symetrical. Therefore it will never (with out VERY fancy electronics) be possible to reduce all 4 cylinders to just 1 pickup