Quote:
Originally Posted by PORTMOODY
Quote:
Originally Posted by Biginboca
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I see, the bench testing proved they were rebranded bosch coils, but that audi post is contradictory. Although, the tester in the audi thread seems to sell them as well so grain of salt required. I looked through spool street and apparently PR was going to dyno test them and that thread seemed to die too. |
Ok help me out.
To update myself, I've been doing a little research on how modern ignition coils work.
I'm under the assumption that the coil is "charged " by a feed current flowing from the DME and releases a high voltage surge when the DME stops the feed current. It's a "one shot" deal. Build and release cycle.
There are segments within the DME program that call for multiple sparks per stroke but I assume these are part of a start sequence or low RPM warm up procedure. Either way, it's controlled by the DME a not the coil.
The best way to achieve a clean power stroke is through a good single spark with the correct timing and dwell. Dwell also controlled by the DME and needs to match the characteristics of the coil.
I am really trying to figure out why / how BMW screwed up the specification for the N54. It's hard to believe that it's something they can not overcome.
Found a good article for those interested.
http://dtec.net.au/Ignition%20Coil%2...alibration.htm