Hi Ken, I've recently been running Bosch platinum single electrode plugs in the Berlina and they don't seem to last all that long. I have some 4 electrode plugs I'm going to try next. Would you mind providing heat range/part numbers for the two iridium plugs? Is there a Denso or an NGK iridium that works in a 2 liter quattro banger? I'm also intrested in the plugs for a 6. Stevan Thomas 73 Berlina Veloce 84 GTV6
In a message dated 4/28/2010 2:09:42 PM Pacific Daylight Time, [email protected] writes: > Date: Sun, 25 Apr 2010 14:31:56 -0500 > From: "KStevenson" <[email protected]> > Subject: RE: [alfa] My GTV-6 has developed a "miss" > > I have been using iridium plugs with great success in my Alfa engines. > Iridium has proven to be a superior, modern improvement in spark plugs. It > is not just a marketing gimmick. If you sign onto using iridium plugs, I > recommend opting for Denso not NGK. The Denso plug has a smaller electrode > which has proven to produce better power. Based on a Denso iridium white > paper, there is a trade off between power and a plug life based on > electrode > size. www.sparkplugs.com has been my source. > > In the Alfa V6 2.0 turbo, the iridium plugs wore away at the ground > electrode. The turbo environment is just difficult on plugs. Last change, > I > opted for an expensive Denso racing plug that has an iridium electrode, > plus > a platinum ground electrode. The jury is still out on getting my value for > the 3X extra cost of the racing plug. On the turbo engine, Alfa recommends > changing plugs every 20k Km (12k miles). There for a while, I had to > change > plugs each year due to mileage. For the turbo engine, 12k miles was not > just > a recommendation, it was required. > > Ken -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
