Re: EMI / RFI and setting timing = problems
 

You remarked about everything being grounded etc. If you ground the shielded cable pickup wires, you just created a magnetic for EMI problems.
I did this, so I learned from experience.

Re: EMI / RFI and setting timing = problems
 

Art, you are correct any shield should only be grounded on one end, by grounding both ends you're making an antenna.

Re: EMI / RFI and setting timing = problems
 

OK
So what the heck is the ground for?
http://static.summitracing.com/globa...8862_cp_ml.jpg

Re: EMI / RFI and setting timing = problems
 

True LOL

Re: EMI / RFI and setting timing = problems
 

Joe the ground is for the shield, it should only be connected at 1 end to ground.

Re: EMI / RFI and setting timing = problems
 

I dont follow..there's one pigtail.........how could you connect it at both ends?:confused:

Re: EMI / RFI and setting timing = problems
 

Art had commented about grounding shields, yes this harness has only 1 lug end but others have exposed wires or cable that some people connect to ground. By connecting both ends of a shield to ground you can actually induce EMI issues. If you have connected the lug on that cable to ground then that is correct. Most older MSD systems would work perfectly with an unshielded crank trigger jumper or pickup when they introduced the digital systems unshielded wiring caused lots of problems.As I stated earlier, the switch from analog to digital systems opened up a lot of issues for quite a few racers.

Re: EMI / RFI and setting timing = problems
 

Yeah . Me being one of them:)

Re: EMI / RFI and setting timing = problems
 

Just something everyone should know about timing lights;
The inductive pick up in most utilize ferrite. This is a magnetic ceramic material used to make the nest that the wire fits in in the pick up.
Ferrite is a very fragile material and if it cracks the performance of the pick up will be compromised.
better timing lights usually have the core encapsulated to help prevent this but I have a $400 Snap-On one that I once cracked the core trying to fit it on some real fat wires.

So what you think is noise could be a timing light problem.