.
Dual Mode Exhaust
Switch; ITEM EXS
For Z06
and 2008 with NPP Option. A switch to turn this function on and off when
you want is a must. If nothing else, to hear the gurgling and popping when
backing off at low speeds! The stock system shuts down below ~3000 RPM
depending on year and model. Now you are in control.
We found a place to put the switch that is
hidden from view, easily and readily accessible while driving and requires
drilling one small hidden hole! If you want to return to stock a small
black rubber plug will go unnoticed (but anyone buying the Corvette will
want this feature-even a purest!) The PDF shows step by step construction
with photos including how we made the hidden switch holder etc. There is no
need to go to the fuse panel in the engine compartment, the fuse that
operates the Dual Mode Exhaust on both Z06 and 2008 NPP option is in front of the passenger foot well. No alterations of the panel or wiring required, just plug in
an “Add-a- Circuit” the way we show you and crimp on the proper size wires to
an Off-0n Switch. Routing the wires is a snap since your not
going very far and none pass through the firewall etc. Just tuck them
in where we show. Our design maintains the 10 amp fuse and draws no
current when the car is off.
Using The Switch Is A Great Way To Increase
Gas Mileage!
No it's not the
improvement from lower exhaust restriction, doubt if that is measurable!
It's the fact that when you hear the exhaust noise and the burbling when you
decelerate at low speeds you only need to go slow! Seriously I have
found that I do not put my foot to the floor as often when I have the
exhaust opened. No need to get to 3000 rpm to get the great sound.
In fact if you wanted you could use lower octane gas and if you keep your
foot out of the throttle and keep rpm's high so your not lugging the engine
it may not even have to detune itself to the 87 octane program! Yes it
does have such a program and detecting a slight knock it will revert to
reduced timing, for a least a short time!

Want More Information on Ways
of Saving Gasoline?
YES, We're Aware A Remote Relay Can Be Used!
We were aware this control feature can be
accomplished with a remote relay. In fact such a relay was purchased well
before the Corvette for another project! Never did use it for what it was
intended. They
are
available from eBay for ~$15 for 15 amp capacity. See the one
we have, photo left.
Why not use it for this project? Using
a remote is fine when next to a garage door that can be seen to open and
close. Some days that happens sooner than others. However how do
you quickly know if the exhaust loud mode is on or off? Can’t
tell. If going through a quiet area you want it off "NOW" – not when
the remote decides to operate with a delay! Also to avoid drawing power
when the car is off (since the GM circuit is powered on when the car is off) requires more complex wiring and when
the car is started is it off or on? With a simple $3.00 switch you can
see what position it is in, instantly. Your choice. However for
a total of about
$15.00 you can add a switch by simply plugging in an “Add-A-Circuit” wired
per our detailed simple instructions. You can hide the switch in the front cup holder
as we did (might as well add a useable cup holder anyway, see our reports
page) or wherever you like! We think it’s a
better choice than a remote relay. My wife also likes it since the switch is
accessible to her as well so she can shut off the noise!
Go to Reports Page