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-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   Best spark plugs to use? Hi-tec or Standard? (http://forums.pelicanparts.com/porsche-911-technical-forum/269910-best-spark-plugs-use-hi-tec-standard.html)

kach22i 04-26-2006 04:19 AM
Quote:
Originally posted by kach22i
I just removed the Bosch platinum W5DPO plugs from my 1977 2.7L. I have never seen more carbon on any plug - ever. With 6,000 miles on them they looked like they had been in since 1977.:eek:

I put some NKG BP7ES plugs in, changed the rotor and distributor cap. I still need to do the timing but a huge improvement already.

At $2.16 a plug I'm going to change the plugs every year.:)
Photos.



http://forums.pelicanparts.com/uploa...1146053884.jpg

kach22i 04-26-2006 04:22 AM
New verses old-part 2.
http://forums.pelicanparts.com/uploa...1146054171.jpg

rnln 06-13-2007 11:04 AM
Anyone can post the model of Bosch copper cores?
Thanks.

jpahemi 06-13-2007 06:56 PM
kach:
NGK also makes Iridium plugs with the same heat range as the ones you show; they make make a good alternative to the standard "ES" type.

jp

rnln 06-16-2007 09:11 PM
I went to Autozone today after making a call. They have many Bosch which has the copper core, and many NGK starting with BPxxx. I lean over the Bosch since this is a German car. NGK would be my first choice if it's a Japanese car, but there are many Bosch plugs with copper core there. The one their computer recommended is BPRxxx and I forgot the model you guys recommended so I had to run home, got on the imternet to find BP7ES and they do have it for only $1.95 each. Good deal and only a mile away.

Now question on gap. What I found after searching here is between 0.024"(0.6mm) and 0.032"(0.8mm) is ok. Is this true? Any exception?

Thanks all.


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