Date: Wed, 28 Apr 2010 21:25:13 EDT From: [email protected] Subject: Re: [alfa] My GTV-6 has developed a "miss"/irridium spark plugs
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 Stevan If can butt in here : Can't help with the GTV6 but for the Berlina the NGK B7ES is the correct plug and lasts way better than any Bosch plug I've tried. I used Bosch in various engine and the only one I kept using them in was the Formula Ford but we changed to new ones for qualifying and the races - expensive because these were the special competition types with small hex and special electrodes and cost heaps. NGK BP7ES may give you better running and performance than the B7ES. It's the projected nose type but for use in 2 litre Alfa engines, each plug will need to be indexed by marking the position of the ground electrode on the porcelain or body of the plug, then ensuring that the electrode ends up between the valves when the plug is installed. If this isn't done, you may hear the clicking sound of a valve (intake more often than exhaust) contacting the electrode. If you get fouling for any reason (state of the engine, tune etc) go to the hotter B6ES or BP6ES but these are definitely not suitable for high rpm use. Les Back from La Bella Italia.. and yes, I visited the Alfa Museum! -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
