Quote:
Originally Posted by GySgtFrank
So which plugs are you using Peter? Just calling them rubbish without an explanation of why you believe them so, and no alternative selection, leaves us just a little short on useable information.  |
I have well over 1000 of these plugs taken out from every Mazda I recalibrate and set up (most are brand new lol), they are very prone to misfire (non audible) and always show less power and efficiency as a result of these non audible misfires. 300bhp level onwards I never ever use these nor recommend them.
The
NGK R7420 is the ideal spark plug (I pioneered the use of these in Greddy Trust brand 10 years ago, now everyone simply regurgitates that recommendation on other homo pay to play sites). It matches these for durability has no misfires, can be gaped to run high output, make more power, use less fuel, can be selected in the correct heat range.