spark plugs..... what do you use

[Mazdarotaryparts]

As said above 9s are the ones you need,

You only ever need hotter (7\'s or 8\'s) if you either have an engine that has low compression that floods or you only go 1/2 a mile to the supermarket

You defiantly don\'t want any colder, indeed if you run 10\'s or colder you risk the car not firing up on a winters morning

Here is a link if you wish to buy 9\'s , I am told by our customers that we are the cheapest around for these plugs

   http://www.mazdarotaryparts.com/bfd-si013-ngk-bur-9eq-spark-plugsb-759-p.asp

Hope this helps

[neil_jdmr]

306 bhp and 9\'s allround with a hiccup

[prince_of_tokyo]

i run 10.5\'s in summer, but now as the weather has got a little chilly have switched to 9\'s all round as advised by clive and laeeq and it runs spot on...

Malik

[20B_boy]

Try sparkplugs.co.uk, they are usually the cheapest and deliver uber quick from experience. Note that there are BUR9EQ and BUR9EQP, the latter being the more expensive platinum variety.

[joshrulz]

I use 2 x B9EGV & 2 x B10EGV NGK plugs, running about 400bhp, did switcg to 10\'s & 11\'s but they had a tendancy to foul up if i was sat in traffic for too long!

same setup as me.  i actually had b9egv in the top but when i cruised along in 4th or 5th around 60kms the engine would momentarly completely die and fire back up straight away with in a second. so put b10egv in the top and problem fixed.
 
there are cases of these egv plugs braking the ground electrode but very few, just dont use iridiums as they a fuse welded together and the rotary gets hot enough to make fall apart