Quick question, currently running ms2 on sbc 350 tbi. My wiring loom is running through a grommet in the firewall but I'm looking to clean it up with a 22 pin weatherpak connector.
Specifics aside, if I split the tach wire in the middle and install it into a connector with a plastic housing next to other wires, will I run into interference problems?
Running shielded tachometer wire through a connector
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Re: Running shielded tachometer wire through a connector
It should be OK, but I would arrange the connector pins so that something tame (like a few shield or ground pins) are closest to the tachin signal pin.
Re: Running shielded tachometer wire through a connector
Can I ask just how often you remove the loom? Adding an extra connector where not essential is never a good idea.GZinga wrote:Quick question, currently running ms2 on sbc 350 tbi. My wiring loom is running through a grommet in the firewall but I'm looking to clean it up with a 22 pin weatherpak connector.
Specifics aside, if I split the tach wire in the middle and install it into a connector with a plastic housing next to other wires, will I run into interference problems?
If a screen really is needed, such a connector needs to provide that screening too. So would have a metal body connected to it.
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Re: Running shielded tachometer wire through a connector
The main reason is because this is on an old jeep. I live in KY and between the hot summers and cold winters the less holes I have in the firewall the better. The 22 weatherpak connector solves this problem and a few others. It also does make pulling the engine harness that much easier.DaveEFI wrote:
Can I ask just how often you remove the loom? Adding an extra connector where not essential is never a good idea.
If a screen really is needed, such a connector needs to provide that screening too. So would have a metal body connected to it.
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Re: Running shielded tachometer wire through a connector
Use an extra pin for the shield. Keep those pins away from others that may create noise. That is your best bet.
Re: Running shielded tachometer wire through a connector
Do this. Twisted screened pair, pass the screen through on a separate pin at the connector, ideally all of them away from the ignition and fuel injector pins, connect the screen to a 0V pin on the MS ONLY and job is a good'un.Paul_VR6 wrote:Use an extra pin for the shield. Keep those pins away from others that may create noise. That is your best bet.
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Re: Running shielded tachometer wire through a connector
That's also how I did mine with the 22-position bulkhead and I have zero noise on my VR sensor input. I just ran all the noisy stuff on one half of the connector and the sensor stuff on the other side and left any spaces possible open between them.