PeachParts Mercedes-Benz Forum - View Single Post - Resistor spark plug converted into a non-resistor spark plug (with pictures)

JamesDean · #10 01-27-2014, 04:17 PM

Quote:

Originally Posted by lsmalley

This is a good point, I did not think about the degrading of the plug internally, but wouldn't also apply to the resistor as well? It is not a solid conductor and it too would be able to have a gap in between. On another note, the plug does have an internal spring which would make sure that there remains a solid connection between the conductors. I will pull the plugs in a few months to check the integrity of the components. Also, I do not understand what you mean about the fallacy in the modification using < 9VDC.

You would be surprised at the effect of contact area. Your copper replacement slugs might not be as smooth as the resistor's contact area. or maybe it its better, I'm not sure.

The voltage that passes through that area, normally, is between 20 and 30 kV, with a 5K resistor that's about 4+ amps of current. With the 9V that the volt meter can supply you only get 0.18mA. A fraction of how much current will actually flow through there. That will have an effect on your measurement to some degree.

Quote:

I have tried oreilly's, as a matter of fact I was on the phone with them today and they said they do not stock them, nor does pep boys, nor does autozone. They all cross referenced to a resistor. My location is Palm Springs and there are plenty of older and newer model MBs on the road. When I go to the junk yard I usually make it a habit to go and pull one of the plugs in the MBs there and I have yet to pull one where there was a non-resistor plug in it.

To be honest, I've not been able to buy the plugs for my m103's locally. I have been able to buy the plugs for the m116/m117 locally.