NGK or Bosch plugs

E28 technical advice asked and given! Troubleshooting, modifications and more.
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2002b13
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NGK or Bosch plugs

Post by 2002b13 »

Just bought an 87is. Sorry for the elementary question.
Cactus
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Post by Cactus »

One is the factory choice, the other is just as good.

Do you prefer Shell gas or Chevron?
Nebraska_e28
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Post by Nebraska_e28 »

Should this be in Tech Talk?
oldskool
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Post by oldskool »

If you reach your pretty little finger up top and press the "Search" button, all your queries will be answered. Somewhat surprising however, is that a search of "chicks with dicks" yields nothing.
Cactus
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Post by Cactus »

oldskool wrote:If you reach your pretty little finger up top and press the "Search" button, all your queries will be answered. Somewhat surprising however, is that a search of "chicks with dicks" yields nothing.
Now this thread will come up in a search for chicks with dicks.
Mike W.
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Post by Mike W. »

Either is fine as long as Platinum isn't part of it.
WilNJ
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Post by WilNJ »

Cactus wrote:
oldskool wrote:If you reach your pretty little finger up top and press the "Search" button, all your queries will be answered. Somewhat surprising however, is that a search of "chicks with dicks" yields nothing.
Now this thread will come up in a search for chicks with dicks.
QFT

http://www.google.com/cse?cx=0026292941 ... 20dicks%22
Brad D.
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Post by Brad D. »

This has been discussed ad nauseam with pretty concise results. Use Bosch WR9LS if you can find them, or NGK ZGR5A if you can't. Don't buy anything platinum or anything with more than one electrode.
Jeremy
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Post by Jeremy »

Brad D. wrote:This has been discussed ad nauseam with pretty concise results. Use Bosch WR9LS if you can find them, or NGK ZGR5A if you can't. Don't buy anything platinum or anything with more than one electrode.
WR9LC work well too and are more available. They just don't last nearly as long.
wkohler
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Post by wkohler »

This really should have an FAQ on the subject in the Tech FAQ section.
Cactus
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Post by Cactus »

wkohler wrote:This really should have an FAQ on the subject in the Tech FAQ section.
Who would make such a thing, I wonder.
alabbasi
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Post by alabbasi »

NGK still sells non resistor plugs , Bosch does not. If your car requires non resister plugs then NGK is your only option unless you want to spend big bucks on Beru plugs or the likes.
Jeremy
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Post by Jeremy »

alabbasi wrote:NGK still sells non resistor plugs , Bosch does not. If your car requires non resister plugs then NGK is your only option unless you want to spend big bucks on Beru plugs or the likes.
There's no problem with using a resistor plug where a non-resistor is factory AFAIK. The resistor is for noise suppression, and most BMW motors spec them for this reason.
Brad D.
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Post by Brad D. »

Jeremy wrote:
alabbasi wrote:NGK still sells non resistor plugs , Bosch does not. If your car requires non resister plugs then NGK is your only option unless you want to spend big bucks on Beru plugs or the likes.
There's no problem with using a resistor plug where a non-resistor is factory AFAIK. The resistor is for noise suppression, and most BMW motors spec them for this reason.
This is correct.
alabbasi
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Post by alabbasi »

Jeremy wrote:
alabbasi wrote:NGK still sells non resistor plugs , Bosch does not. If your car requires non resister plugs then NGK is your only option unless you want to spend big bucks on Beru plugs or the likes.
There's no problem with using a resistor plug where a non-resistor is factory AFAIK. The resistor is for noise suppression, and most BMW motors spec them for this reason.
Coming from the MB world, people recommend against using resistor plugs for cars in the same area as the E28. From my understanding, the resistance is already built into the wires and other ignition components. Thus adding resistor plugs will add to the resistance and cause your ignition system to go be out of spec.

This may not be the case for BMW's. I don't know as I'm still learning the car.
demetk
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Post by demetk »

Wires are spec'd for 6k ohms resistance. Spark plugs are also spec'd for 6k ohms resistance. This gives 12k ohms total resistance.
dsw99a
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plugs

Post by dsw99a »

As much as i want to be a factory man. my 87 528e loves the platinum +4. I know a lots of people here hate em. Ive got an open loop, so dont know if that comes into the equation, listen and learn your car, sometimes it takes some trial and error. Be one with your e28.
Jeremy
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Re: plugs

Post by Jeremy »

dsw99a wrote:As much as i want to be a factory man. my 87 528e loves the platinum +4. I know a lots of people here hate em. Ive got an open loop, so dont know if that comes into the equation, listen and learn your car, sometimes it takes some trial and error. Be one with your e28.
My car (82 528e at the time) liked them when they were first installed. I found that they fouled quickly (10-15k miles) and were impossible to clean properly. Too much money for plugs that only lasted 15k miles. The silbers wear like iron and are easy to clean the carbon/ash off of with a wire brush if required. I'll admit that I went to coppers on that car though. They were cheap, so when they ashed up I just replaced them.
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