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-   -   Current spark plug recommendations (https://www.miataturbo.net/engine-performance-56/current-spark-plug-recommendations-107336/)

poormxdad 09-14-2022 08:45 PM
Current spark plug recommendations
 
Gents,

I need new plugs. I've run NGK Iridiums on my track car for years. I've used the 6-11 and 7-11 since going FI. I've got a Rotrex equipped NB1 putting out about 225 rwhp with ~10psi boost. What's the current thinking on heat range and gap?

Thanks,

LeoNA 09-14-2022 09:40 PM
BKR7EIX, .032” gap. At 10psi, if you have a strong ignition I would try the -11 with the .043” (1.1mm) gap. If your not doing extended high speed driving, the 6 heat range would be fine.

Originally Posted by poormxdad (Post 1627938)
Gents,

I need new plugs. I've run NGK Iridiums on my track car for years. I've used the 6-11 and 7-11 since going FI. I've got a Rotrex equipped NB1 putting out about 225 rwhp with ~10psi boost. What's the current thinking on heat range and gap?

Thanks,


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