New Universal Ignition System

[pamcopete]

throtlsnapr

Suggest you take your trusty multimeter down to the local parts store and measure one right out of the box!

[sjkrebs]

the iridium plugs are "suppressing" plugs. It may or may not actually read 5k resistance when tested, but should be used with non-resistor type wires and caps, Just as you would use a resistor plug. However, from my what I've learned about them, you are going to want to use the high output replacement coil (mikesxs #17-6803), not the stock dual lead coil from the 80-84's with stock cdi, if you really want the extra 2 HP. Also make sure your charging system is in good working order.

[WA1DH]

I have Iridium plugs and non-resistance caps and wires - so I should be all set if I want to use the universal ignition system? I would just need to get the high-output coil?

[pamcopete]

kb1jec

Sounds like you're set to go. Suggest that you use MikexXS #17-6803 dual output coil ($32) and the ground clamp mounting clamps.

[throtlsnapr]

I figured on using the 6803 coil and run on atotal loss off well charged battery.(track bike)I assume this system wouldn,t draw down the battery any quicker than points?I have had no problems before but will be riding a 2 hour endurance.

[pamcopete]

throtlsnapper

The Hall sensor only uses 13 ma of current, so the current draw for the coil would be the major factor. The points coils are each 4 Ohms, but only one is on at a time for a 90 deg dwell angle ea, or a total of 180 degrees of camshaft rotation which is a 50% duty cycle. So, the current draw for the points system would be 12/4 = 3 X 50% = 1.5 Amps. If you start off with a fully charged 14AH battery, it will take about 9 hours for the battery voltage to drop to 10.5 volts.

MikesXS 16-6803 coil is a nominal 2.5 Ohms. The Universal Ignition System is a 180 deg equivalent Dwell angle system or 50% duty cycle as well, so the current draw for it would be:

12/2.5 = 4.8 X 50% = 2.4 Amps

If you start of with a 14AH battery it will take about 6 hours for the battery to drop to 10.5 volts.

In both cases the coil resistance increases with the heat, both from the coil itself and the engine heat. Mikes coil resistance will increase to 3 Ohms after the first hour of operation, so you will be good for more than 6 hours. The Hall effect sensor will work all the way down to 3 volts, so the failure mode will be a coil failure, probably at around 8 volts, which won't occur until well after the 6 hour discharge period and, of course, well past the time when you collect the trophy!

[compa]

Pete, What sparkplug do you recommend with your system. Did I read in another thread no to irideum (sp) also what plug connector, 0 ohm or 5 ohm

[pamcopete]

compa

I have no personal experience with iridium plugs. My earlier comments were in regard to a member who has developed a PM alternator that develops low voltage, so I suggested that his main concern was starting with a low or no battery setup (giant capacitor) and that in general, the more exotic plugs require a greater voltage to work properly.

My general recommendations for plugs and resistance are that you should have 5K min in each plug circuit obtained in one of three ways:

1. Non resistor plug, non resistor wire, 5K cap.
2. Non resistor plug, resistor wire. (10K), 0K cap
3. Resistor plug (5K), non resistor wire, 0K Cap

These reccomendations are for an electronic ign system, either the stock TCI or any after market electronic system.

[robertob]

I've read through your post and can't find the answer but forgive me if it's in there somewhere. What's the maximum current capacity of the power transistor? Enough to drive a couple of COP coils from a gsxr or similar?

[robertob]

Maybe i answered my own question - you're using MJH10012 NPN transistor with a 10A rating. So that means (assuming coils in parallel):

10A max current x 2 (50% dc) = 20A max current = 12v/X = 12/20 = .6 ohms *2 = 1.2 ohms per coil.

The gsxr coils I'm thinking of are like .8 ohms each so looks like it won't work (if those coils would even work that way)


[pamcopete]

robertob

The minimum reccomended primary resistance is 2 Ohms which is about 7 Amps @ 14V.

[robertob]

cool, thanks.

[pamcopete]

robertob

That's not the transistor I'm using. The current product uses an IGBT transistor.

[moya034]

Just figured I'd give a 1000 mile update and say my pampcopete ignition system is still working perfectly and the timing hasn't budged.

[throtlsnapr]

In regards to my question about total loss,well explained Pamcopete.You sure make the trophy part sound easy!Look for a PM.