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Registered
Join Date: Mar 2002
Location: Thousand Oaks, CA
Posts: 249
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Plug alternative for 2.2S w/mfi
Hey, all
I am about to go through the Check / Measure / Adjust procedures on my 2.2S MFI, and wanted to try an alternate plug. I have been happy with the stock Bosch W3dpo so far, but now have an MSD unit which recommends a much wider plug gap. To date, I have not been able to figure out how to adjust the gap on the side-firing Bosch platinums, and am looking for a good, traditional style electrode plug that I can adjust the gap on. Research shows that the NGK plugs seem to be favorite alternatives, but what would be the proper one for an early S? Thanks,
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Kevin G., '72 T Targa |
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11-08-2002, 06:15 AM
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Registered
Join Date: Jul 2001
Location: Springfield, MO
Posts: 1,422
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I used champions (gasp! gasp!) in my 2.2E. They worked very well. (Just another Wal-Mart type of decision)
Good luck, David Duffield |
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11-08-2002, 06:30 AM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,500
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I used NGKBPR7ES in my 2.4E with MFI. When I was getting a lot of fouling I went with the hotter BPR6ES. That plug will support a gap up to .060. However I ran mine at .032.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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11-08-2002, 06:53 AM
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Join Date: Mar 1999
Location: Vancouver,Wa.
Posts: 4,457
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I have a 9.7:1 compression ratio in my 2.7L and run BP7ES gapped at .045 (MSD, their high vibration coil, & 8.5mm Magnecore wires). The Webers are set to run rich.
I would think 7s or maybe 8s with the cleaner running MFI. At a buck & a bit a plug, a guy can afford to experiment.
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JPIII Early Boxster |
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11-08-2002, 09:12 AM
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Join Date: Feb 2000
Location: Dallas, TX
Posts: 4,612
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Kevin,
I asked a similar question in which I listed plug recommendation from other threads. Go here to read the entire message.
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Neil '73 911S targa |
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11-08-2002, 09:34 AM
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Registered
Join Date: Mar 2002
Location: Thousand Oaks, CA
Posts: 249
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Muchas Gracias mi amigos!
Strange that the hot/cold numbers go in different directions between Bosch and NGK. Talk about confusing to know-nothings like me. According to the chart provided by Neil K's link, the NGK BPR9ES is the closest match to my current W3DPO's. But based on the type of driving I do, (Stop & Go commute, and highway) I should be using a hotter plug such as the BPR8ES or 7ES as recommended by Mr. Stein, with the potential for the 6ES if I get fouling. Looks like I will ride the fence and start with the 7's and go from there. Time to Play! Thanks!
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Kevin G., '72 T Targa |
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11-08-2002, 10:01 AM
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Registered
Join Date: Nov 2001
Location: Los Angeles
Posts: 937
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Kevin, for what it's worth, I commute in my 72T in LA everyday. Started with Bosch (had always used them in Porsche and VW's) and at recommendation of Steve W and others on this board went with the BPR6ES. Car is much happier. My MFI system needs to be cleaned out and rebuilt, so it runs rich, as a point of reference - but I'm sold on NGK. In LA, I'd go hotter (no pun intended) rather than colder....
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Scott |
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11-08-2002, 12:59 PM
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