Re: spark plugs

["Ron Buchalski" <rbuchals@xxxxxxxxxxx>]

Paul,

Your best bet is to stick with the OEM plugs for your M3.  You're getting 
maximum ignition performance with them.  The newer BMWs (with individual 
ignition coils for each cylinder) can deliver plenty of energy to the spark 
plug.  So, to match the high energy capability of the individual coils, the 
OEM plugs allow a much larger spark.

The Bosch platinum multi-electrode plugs are designed for cars with weaker 
ignition systems, so they'll produce a "better" spark with a lower voltage.  
Also, the platinum electrode lasts a long time, so it satisfies those "no 
tuneups for 100k miles" claims.

When you put these plugs into your M3, they won't make as good of a spark as 
the OEM plugs will, and you'll notice the difference right away.

- -rb

>
>Date: Wed, 14 Feb 2001 15:48:42
>From: "Paul Frederick" <pfrederi@domain.elided>
>Subject: spark plugs
>
>Can anyone give me any insight on this? I had the OEM spark plugs in my '95 
>M3 since I first had the car and i figured I would upgrade to the bosch 
>platinum 4's hoping to somehow improve performance. But instead it seems 
>that I have lost some power since putting in the bosh plat 4. Now I seem to 
>have a flat spot when I hit the gas. I thought these spark plugs are 
>supposed to be better than the oem.
>Also, is there any special programming that has to be done to the jim c 
>chip to accomadate these spark plugs(plat 4) so that they are used more 
>effeciently?
>
>
>TIA
>Paul F.
>BMWCCA186412

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