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440 ex, spark plug question
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Posted by: Honda_Matt

Dustin075 is building up his 440ex,

He's got a 440 wiseco 11:1
HD Studs
Cometic Gaskets
HC2 Cam
Edelbrock Carb
Curtis Sparks X-6
& possibly doing an airbox / airfilter mod.

Should he run the stock spark plug, or go colder or hotter?

Switch to Iridium? What are you guys doing with your 440 spark plugs?

Posted by: REDRIDDER

Iridium plug for an ex i dont think so? I would just stay with the NGKDPR8Z plug, just my personal preference.

Posted by: drew416ex

dpr8z or dpr9z

Posted by: TRXRacer1

quote:
Originally posted by drew416ex
dpr8z or dpr9z