colder plugs (grade 10) in 1060 motors?!?!

[Gabro]

i've been suggested to use DCPR10 plugs in my 1060 singleplug heads motor... i've never had problem using 9's what can I expect using 10's?!?!

any experience?

[T286]

Only needed if you raised the compression ratio,but it won't hurt to use
the rule of thumb is for the bottom 3 treads to discolor to indicate the right heat range

[Gabro]

i've not decked cylinders or heads, but compression ratio naturally increase while increasing bore!

i'll give a try at those plugs at the next change :)

[danman]

Use them only if you need to, if the plug is too cool the will not self clean correctly and the build up of carbon can cause pre-detonation. The first thing to establish is if there is not a lean condition...but just look at the plug, it will tell you all you need to know. And since NGK does not make a DCPR10, or at least here in the US, you will use either an NGK R2525-10 or Brisk makes really good surface discharge plugs...BOR10LGS for the surface discharge but you need to have an ignition amp with these as they require the extra power to make the spark happen. Other than that the Brisk plugs work well, I did have to add 3 milliseconds of fuel in the midrange with them as the plugs made a lean spot more prominent between 2.5 thru 10% throttle..after that the acceleration on Motor Incarnation Part III is stellar.