Changes by last author:
Changed:
| The transformer cores are firghtening small. We are checking if they are surely ment for inductive (not CDI) operation. |
| The transformer cores are firghtening small. We were note sure they are inductive (not CDI) operation. But they seem to work well with inductive. |
| The 12V is promising, why would a CDI coil have 12V printed on it ? |
| The 12V text is promising, it would not make sense for a CDI coil. |
| The engine didn't start since the first (Beru) coils are on (with the longer HV connection). |
|
2.5 msec (VBatt=14V) seems to be a bit too high current: Using 3 x 0.1 Ohm 5W in parallel (as measuring resistor, in series with one coil's primary winding), at 1200 RPM * (9mV / 0.033 Ohm) DC mean current was measured (on ONE coil, that is fired every crankrot), which means mean current while the coild is charged: * Idc = 0.009/0.033 * 60000/1200 / 2.8 = 4.87 A notes: ** the 60000 msec / 1200 is the time of 1 crankrot at 1200 RPM ** 0.009 / 0.033 is the 9mV / 0.033 Ohm ** / 2.8 is for the the 2.5msec actual dwell (as read from LCD; higher than 2.5 msec because the VBatt was lower than 14V The peak current is twice as much, that is 2 * 4.87 = 9.74 A, which is a bit high (5..8A is usually best) Marcell recommends trying 2.1 msec dwell and measuring again. |