is there anyway to measure the ouput from a COP (coil over plug)? i have a scope, just dont know what points to measure.
also what will be the easiest way to fire up a coil on the bench? i have a function generator, ps, scope.
how to measure Coil Over Plug output?
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Re: how to measure Coil Over Plug output?
i have 3 different audi coils and a bmw coil, just trying to compare if one give out a better spark than the other.
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jcarruthers
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Re: how to measure Coil Over Plug output?
Probably not very scientific but you could measure the gap it will jump.
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Re: how to measure Coil Over Plug output?
To measure the actual spark energy with sensors on the HV side is requiring instrumentation that I think no DIYer has at home.
If you work at a fancy lab you may be able to borrow a HF power meter equipped with high frequency HV sensors for voltage and current
However , there is an easier and less accurate way. Connect a COP and trigger up on a bench setup and measure the input voltage and input current with true RMS instruments ( A moving iron ammeter would be ideal) that goes to the COP unit at say 3000 rpm. Use identical spark plugs and let each COP unit get warm before you note the readings.
Make comparisons of the V*A that equals W input to the COP. The COP with the highest Watt is likely to have the most energy rich spark.
Crude, but useful method.
My guess is also that you will be able to distinguish between the different units based on sound level, at least with some practice. A blue fat spark is always nice.
You may want to be careful with the spark gap that you use. Trying COPS with a several mm long spark gap is tempting and looks cool, but may lead to partial discharges and shorts in the COP unit HV winding. For at least one make of COPs, worn out spark plugs and COP failures are very much interrelated.
Best regards
Heribert
If you work at a fancy lab you may be able to borrow a HF power meter equipped with high frequency HV sensors for voltage and current
However , there is an easier and less accurate way. Connect a COP and trigger up on a bench setup and measure the input voltage and input current with true RMS instruments ( A moving iron ammeter would be ideal) that goes to the COP unit at say 3000 rpm. Use identical spark plugs and let each COP unit get warm before you note the readings.
Make comparisons of the V*A that equals W input to the COP. The COP with the highest Watt is likely to have the most energy rich spark.
Crude, but useful method.
My guess is also that you will be able to distinguish between the different units based on sound level, at least with some practice. A blue fat spark is always nice.
You may want to be careful with the spark gap that you use. Trying COPS with a several mm long spark gap is tempting and looks cool, but may lead to partial discharges and shorts in the COP unit HV winding. For at least one make of COPs, worn out spark plugs and COP failures are very much interrelated.
Best regards
Heribert
If it is not understood , it will not work!