While both the Technical Service Bulletin (TSB) documentation itself and the modification of the Ford Mustang in the aftermarket, by owners & tuners alike, is not anything new, the fact it is making substantial buzz within online communities and forums, is. The infant-aged Coyote 5.0-liter V8 power plant found in the late-model Mustang and F-Series trucks is now subject to scrutiny; not necessarily of the bad kind as a result of Ford’s craftsmanship, but how it is handles being “adjusted” by aftermarket players and wrench-turners out there, seeking to milk more out of the engine beyond the 400+ hp mark.
The TSB states that any modifications to the engine’s factory Powertrain Control Module (PCM), air induction system (air box, air filter, zip tube) or any sort of supercharger are probable to cause potential issues with not just Ford’s warranty coverage, but traumatic engine damage. Such explained damages could be (and not limited to): piston damage, knock-induced damage due to timing advancement, lean fuel trim, and catalyst damage.
Well, it is not any secret YMMV when it comes to tweaking and tuning any manufacturer’s final product, but let’s be honest, enthusiasts have been doing this for years now. So what does this mean, at a higher level? Is the tuning market being culled a bit? Ford, and many other manufacturers (globally), are producing equipment that is about as good as it gets from the factory, so is there less room for bolstering to higher performance than there once was? Is this a good thing or a bad thing?
As far as this specific example goes, take a look at the TSB itself, and decide for yourself if this is the dawn of a new precedent, not just with Ford, but industry-wide…
OfficialTSB documentation –> tsb11-07-07-1
Source: Ford Motor CompanyCategories: Ford, Mustang Tech