Hi, these guys are now shipping to Oz so I bought one to have a play with. I received the distributor and it looks fine, no problems with the seller. However, there was no information with it. Can anyone who has already installed one please supply the specifications such as timing advance etc and also some installation instructions such as how to set static timing. Any info gratefully received.
Rgds Pat
Is that coil designed to have a ballast resistor? Total resistance for coil plus ballast is often in the 3 ohm range.Finally installed mine. Seems to work fine right through the rev range. One thing I did detect is that the little heatsink gets very hot. Anyone else find this? I am using a Bosch hec713 coil which has a primary resistance of about 1.4ohms and resistance between the - or + and the centre HT terminal of about 8Mohm.
They are not discussing he 123 unit which is quite expensive, it is about a lower cost unit which is avialable on Ebay, the link can be found earlier in this long thread.i did not understood why you talk of 40 USD..the price is 10 times higher..or there is something i didnt catched up?
That is the point. If it is an older coil and the primary resistance is that low, it was likely designed to be used with a ballast. The switching transistor is probably switching about twice the current it was designed for causing excess heat.The heat sink for the ignition module likely would not be affected by a ballast resister, the ballast resister is for the coil. The heatsink is for the switching IC and the logic circuits which is going to get hot regardless, a bigger heatsink is the solution to this issue.
The 124 and most other modern electronic ignition coils don’t use a ballast resister as the coil is set up to not need one. Unless the directions show otherwise this shouldn’t need one.