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08-24-2020, 11:20 PM
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#1 |
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VIP Member
Join Date: Nov 2009
Location: Egg Harbor Township, NJ
Posts: 1,469
Likes: 1,452
Liked 4,365 Times in 501 Posts
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Re: Wire Shielding EMI or RF Noise?
I’m using copper tape as a shield on the cam signal, crank signal, and their shared signal ground. All 3 wires come out of distributor together along with 12v power and I have the shielding grounded at one end only. I separated the 12v wire right out of distributor as close as I could and put a ferrite bead on it. I also put ferrite beads on water pump 12v, alternator charging wire, and twisted the coil pos/neg wire from ignition box to coil and put one bead on the twist. Am I using them in the right spots? Should I put ferrite beads on the already shielded signal wires also? Thanks.
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08-28-2020, 07:28 PM
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#2 |
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Senior Member
Join Date: Dec 2008
Location: Rainy Washington
Posts: 609
Likes: 12
Liked 223 Times in 73 Posts
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Re: Wire Shielding EMI or RF Noise?
Ok finally got to look at both data loggers samples, The fast system sample is .05 seconds and my tach samples at .01 seconds. I know i can export my fast system to excel, i will check to see if i can export my tachfact software to excel also and the overlay a same run to see what is looks like. My tach down loads look much smoother then the fast system, I could be it is filtered some?
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James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023 |
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08-29-2020, 05:54 PM
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#3 |
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VIP Member
Join Date: Nov 2009
Location: Egg Harbor Township, NJ
Posts: 1,469
Likes: 1,452
Liked 4,365 Times in 501 Posts
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Re: Wire Shielding EMI or RF Noise?
Yes I believe the tachfacts is being filtered and you are correct is it actually a better sample rate than the FAST. Mine does look better on tachfact but definitely not as nice as the super stocker looks on there. I went overboard with wire shield and ferrite cores so I will see what happens.
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