Nope, the directions say the 6 and the gap is different for the different years.
Larry White Knight 1991 Crystal White #99 CSP Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo Honey B 1992 Sunburst Yellow #99 SM2L JR Supercharger Whooosh 2004 Titanium Mazdaspeed MX-5 LowCountry Miata http://www.lowcountrymiataclub.net Masters Miata RAGS 074 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry Alster Sent: Thursday, March 20, 2008 8:46 AM To: [EMAIL PROTECTED]; 'Steve Kiffmeyer' Cc: [email protected]; [EMAIL PROTECTED] Subject: RE: NGK spark plugs for turbo 99 Depending on the model year???? Larry White Knight 1991 Crystal White #99 CSP Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo Honey B 1992 Sunburst Yellow #99 SM2L JR Supercharger Whooosh 2004 Titanium Mazdaspeed MX-5 LowCountry Miata http://www.lowcountrymiataclub.net Masters Miata RAGS 074 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, March 20, 2008 8:43 AM To: Steve Kiffmeyer Cc: [EMAIL PROTECTED]; [email protected] Subject: Re: NGK spark plugs for turbo 99 Didn't FM go from the ZRF7 to recommending the ZRF6? Wallyman Inactive hide details for "Steve Kiffmeyer" <[EMAIL PROTECTED]>"Steve Kiffmeyer" <[EMAIL PROTECTED]> "Steve Kiffmeyer" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] 03/20/2008 07:17 AM To <[email protected]> cc Subject Re: NGK spark plugs for turbo 99 Both are the same except: The 6 and 7 numbers designate heat ratings. The 7 is a colder heat range than the 6. The colder range is better for forced induction. It helps prevent detonation. The ZFR designates an extended plug, which is good for forced induction. It gets the spark farther into the combustion chamber for better flame front. The -11 designates that it is pre gapped at 1.1mm. Not sure what the F designates....anyone? I would stick with the ZRF7F as heat range is the most important for forced induction. Both are extended plug which is good. Steve ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, March 20, 2008 12:17 AM Subject: NGK spark plugs for turbo 99 > > What's the proper part # for the NGK plugs for turbo use? The ones I > had in my car before are ZFR7F-11, but I checked the the new ones that > I was about to put in and they are ZFR6F. > > --Ian > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
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