(I am posting this on
SCCA forums as well as on the Vorshlag forum)
So after 18 months of ownership we finally pulled the GIANT foglights off of my 2011 Mustang GT that we run in STX (ignore the "STU" markings in the lower left picture - with the new ST classification rules we cannot run this car in STU on wider tires any longer - its STX or nothing; I'm not complaining, just explaining). They don't weigh much, but hey, every little bit helps. Removing them uncovered the factory air inlet for the engine. Doh! That LF fog light has been blocking that opening from day 1, so its never going back on. So this would end up being sort of a "ram air" inlet... MOAR POWER! (just what this car doesn't need)
Now looking into this opening there's going to be more air going in via this hole. How well can I seal this to the air inlet, which is 4-5" behind the foglight opening? I mean, does the allowed "cold air" modification extend into the foglight hole?
14.10 ENGINE AND DRIVETRAIN
C. The air intake system up to, but not including, the engine inlet may be modified or replaced. The engine inlet is the throttle body, carburetor, compressor inlet, or intake manifold, whichever comes first. The existing structure of the car may not be modified for the passage of ducting from the air cleaner to the engine inlet. Holes may be drilled for mounting. Emissions or engine management components in the air intake system, such as a PCV valve, or mass airflow sensor, may not be removed, modified, or replaced, and must retain their original function along the flow path.
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Notice the bolded part in 14.10.C above, which is where I am concerned. We
are allowed to remove the foglights (
via 14.2.C), so can my allowed cold air extend to the
opening of the foglight hole? And if so, is drilling a hole to mount the "air horn" an allowed modification? I'd think the wording "Holes may be drilled for mounting" kind of covers that.
My goal is to make some sort of sealed tube that goes into the foglight opening for some sort of "ram air" effect. Again, not critical at autocross speeds but when we're bombing around a big road course at 150mph+ it doesn't hurt. I also want to make a fog light "mesh grill" for both fog light openings, to keep rocks and track debris from smashing into the now uncovered evap core / radiator behind the foglights (this car get's tracked a lot and being sprayed with rocks isn't unheard of) This mesh would be more of a "comfort and convenience" mod, via Stock class rule 13.2.A, and not in any way performance enhancing. Right?
Lastly, when we make the foglight mesh grill covers, for the RF foglight hole I'd
like to make a little air deflector to direct air from that opening towards the evap core/radiator as well... but I can't see where that mod is allowed, so if not it won't happen.
waiting to see...