They are not fun, its almost 3 hours to do all 16 plugs. Thanks Ford
JimIII
---------- Post added at 05:17 PM ---------- Previous post was at 05:11 PM ----------
The tune calibration really has not that much to do with the heat range of the plugs. Roush tune's most of their vehicles, Raptors included with a very rich Fuel curve and aggressive timing curve. They add fuel for protection, which kills power. And then ramp up the timing to get the power back. However they do not have the "Know How" to the alter the throttle and transmission tables to get better performance and drive-ability like you see from our JDM Custom tune! We dial in the Air fuel to what is desired of a Supercharged engine, right around 11.5-12:1 AF. Then we scale the timing back, to a much safer level. After that we implement our throttle and transmission changes and you end up making 50-60 more HP with better driveability, fuel economy, and shifting! It's a whole new truck!
The Roush tune being aggressive on timing is more likely to damage or burn up a spark plug. And being so Rich with fuel they will quickly foul out the plugs. I would be very surprised if you could get to 100K with out changing them, I would never attempt that! Especially since they practice using the stock spark plugs which are hotter firing plugs! When you ramp up the timing and create a hotter spark from boost, power, etc...you stand more chance of detonation. Going to a Colder spark plug like the NGK Iridium 6510's we use here your much less likely do damage a spark plug! If you burn the tip off a spark plug you can damage your motor severely! I think it's just laziness on their behalf as to why they don't change the spark plugs. Nothing to do with the Calibration.
JimIII
