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Re: Spark Plug Gap for Turbo MX5
Posted: Mon Jun 18, 2007 10:24 am
by lowmiata
antmx5 wrote:Hi All,
I've done a search, but couldn't find any info on this? Do the Turbo MX-5's run a smaller spark plug gap to the NA (naturally asipirated) one's?
Thanks
yes colder and gapped
I cant remember what the gap was soppose to be and cant remember if i wrote it down anywhere
i would have to pull one out to check
Posted: Mon Jun 18, 2007 11:36 am
by ampz
Colder and gapped?!!
Same plug higher number? (IE: NGK bk7 something)
Posted: Mon Jun 18, 2007 11:36 am
by Uncle Arthur
If the standard plug for the MX5 is the NGK BKRE6, then the colder plug is the BKRE7 (or the other way around).
Basically you should go one plug temp range cooler to help avoid detonation (along with increased fuelling, 1 deg timing retard for every PSI of boost at each rev range, plus an IC of some kind).....
www.miataturbo.net IS your friend
Posted: Mon Jun 18, 2007 11:52 am
by ampz
Found it.
LinkyLucky it was cold last night
Posted: Tue Jun 19, 2007 10:06 am
by Garry
Yeap, the NGK '7's work well in the SP too. Though mine are still using the stock gap. They fixed my little pinging problem right up.
Posted: Wed Jun 20, 2007 2:47 am
by Sean
I run 7s gapped at 1mm in most conditions.
If I ran big boost (over 15ish psi) I found the spark would break down.
For big boost we gap down to .8mm (idle is a bit dodgy when cold with such a low gap) and run an 8
I'm running NGK \"V Power\" range of plugs, only cost a few bucks each and run like a dream.