| MCowher |
A friend of mine used to work in car audio years ago, and has suggested using "resistor" spark plugs to help with any alternator whine I'm getting...
I've got mine down to a pretty minimal level by using a dedicated ground wire that's connected to my front passenger seat's seat bolt, but my PAC AAI-NIS is farther away and is not grounded to that same point.
Do our Murano's already have "resistor" spark plug technology, and it not, would they help with alternator whine? |
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| Kris |
| In "good old days" actually the high voltage cables had resistors build in. I am pretty sure MO has something "equivalent"... |
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| njjoe |
MCowher-
Yes, the MO comes equipped with NGK resister plugs. The NGK part number is PLFR5A-11.
According to the NGK website, this plug has the following features:
"Platinum plug, 14mm, 26.5mm reach, 5/8" hex, gasket seat, resistor, projected tip, extreme long life double platinum, fine point platinum on center electrode, platinum tip laser welded on ground electrode, .044"gap
NGK extreme life plug. By using the highest platinum content in the industry, NGK has created an extremely long life spark plug. Laser welded platinum tip on center electrode and platinum tip on the ground electrode. The center electrode is taper cut which aids in focusing the spark while reducing the voltage necessary to start the combustion process, this will provide better throttle response, improve efficiency and allow a smoother idle."
I hope this helps.
-njjoe |
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| MCowher |
That's perfect! Thanks!
Now I can go down other avenues to eliminate the remaining alternator whine (only audible at high volume). |
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| GMTURBO43 |
| I've always found whine issues to be ground related. |
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| Kris |
quote:
Originally posted by GMTURBO43
I've always found whine issues to be ground related.
On what GROUND......:2: |
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| GMTURBO43 |
quote:
Originally posted by Kris
On what GROUND......:2:
There are a few ways I could respond...
"On the grounds of experience."
"I said wHine - not wine." :)
"I got upset with the whining and smashed the amp on the ground of the garage." |
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| Kris |
quote:
Originally posted by GMTURBO43
There are a few ways I could respond...
"On the grounds of experience."
"I said wHine - not wine." :)
"I got upset with the whining and smashed the amp on the ground of the garage."
:7: :claphead: |
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| Tyler_Canada |
| I assume you ran your RCAs on the opposite side of the vehicle as your power wire, and that you used good shielded RCAs? |
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| Eric L. |
A little unrelated, but looking at other forums, the VQ engines seem to perform best with the NGK Platinums. I would not use any other type of spark plug.
The box for the NGK Platinum plugs are very cool - it says "Laser Platinum" on it. |
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| cschmidt |
Mark,
I'd love to come see your Murano and get some ideas for mine. Give me a call or email sometime.
Chuck
chuck.schmidt@att.net |
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| hfelknor |
Alternator whine is generally associated with grounding, as noted.
BUT, it is often associated with a phenomena known as a Ground Loop.
This is when multiple devices, etc are grounded........to multiple grounds...........all of which are not "true" or complete grounds. When there are voltage potentials between "grounds" you have a recipe for interference.
One way you car break it up is to disturb the "loop".
Try partially pulling one of the RCAs out, so that the center conductor is making contact, but the outside part of the plug is not.
If that doesn't do it, try lifting the ground from one or more devices. Isolate the amp for instance.
and if all else fails, there ARE Alternator Whine FILTERS that are available.
Homer |
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| MCowher |
Well, I was finally able to get rid of 99% of the alternator whine by adding a ground loop isolator between my NavBox audio outs and the PAC AAI-NIS audio inputs.
I also had to insulate the ground from the Navbox video OUT to my Video distribution amplifiers video input. I just used a RCA jack rubber cap and poked a hole in the end, so that the positive pin could still be connected.
I thought I would be able to use a second ground loop isolator for the video, but when I hook it inline to the video, I get no video signal coming through for some reason.
Most of my devices related to my XBox (Xbox, NavBox, rear seat monitors, audio amplifier) were connected to the same ground, but the PAC AAI-NIS has it's own ground (part of the molex connectors) , so I guess that was the source of the ground loop was coming from...It also seems that the video amplifier was producing some ground loop (or other interference), even though it's ground was the same as the Navbox ground.
The bottom line is that I'm happy now...I can only hear a tiny bit of alternator whine if I crank up my volume all the way up.
Thanks for your help guys! |
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