Replace
both the factory
S4 side mounts with
a larger front mount.
Using stock ICs
(designed for 10psi)
with a chipped ECU
requesting TWICE
the stock boost
raises
turbo outlet (T-out)
to 200°F
over ambient. Stock
ICs lack both the
surface area and
mass to maintain
a safe intake air
temperature (IAT).
The ECU cuts power
by retarding timing,
reducing boost,
and running rich
to reduce EGT or
knock,
each time it senses
just high IAT,
DUH.
Anytime
your S4 is in heavy
traffic, stopped
at a light, or under
heavy load, your
S4 side mounts become “inter-heaters”.
Only after driving
continuously off
boost above 35mph
(45mph on tight
finned RS4 cores)
for 3-7 minutes will
IAT drop low enough
for ignition timing
and performance
to return, DUH.
This
FMIC increases power
with drastically
cooler IAT mostly
at mid to high RPM
where the stock IC
is overwhelmed by
200°F
over ambient T-out.
Enhanced knock resistance
yields improved
engine torque from
more ignition advance,
even on pump gas.
Cooler IAT yields
denser A/F charge
which means more
O2 is burned per
engine cycle which
improves the engines
volumetric efficiency,
DUH
