It's better to never grow up, and definitely record a video. There aren't many on Youtube with the 430 exhaust.
You mentioned you had a control switch. i am assuming that doesn't come with the 430 exhaust. Can you point me in the direction of how you did the ECU and Control Switch? (I don't want my neighbors to hate me.)
No, the control switch does not come with anything. Maybe Capistro .. they provide a remote control fob to toggle the bypass valves. And, I made no modification to the ECU for any of this. In effect, the 360 ECU will control the exhaust bypass no differently than it does now. And, I too wanted to maintain harmony with my neighbors.
Here is how I did it ...
Look at the photo I am attaching. This is the left side, but the right side is similar. You need to purchase two automotive control relays and I recommend a pair of wiring harnesses as well. I bought four 30/40 Amp relays and wiring harnesses on Amazon.com for $5 ... see attached photo.
There are two leads going to the bypass valve control solenoid that come from the ECU. One is constant power (purple) and one is switched ground (yellow/blue). Your colors may vary. You need to splice into the constant power to provide power to the coil side of the relay. I used terminal #85 on the relays as the positive side. The negative side of the relay coil is then tied to the same as the other solenoid. I used #86 as the negative side of the relay coil. Since the mount for the relay is so close to your splice points, I did not fuse these leads.
You then need to cut the negative side lead of the solenoid (the yellow/blue wire) and connect that to the normally closed switch of the relay. This usually indicated as terminal 30 on the relay. Then connect the corresponding terminal, #87A, back to the solenoid. So when the relay is NOT energized, this circuit is complete and the ECU will control the bypass valve. When the relay is energized, this circuit is broken which then keeps the bypass valves in the OPEN position.
Now back to wiring the relay coil to your control switch. You will be controlling both relays with a single switch. So you wire the relay coils terminals (#86) together and then route a single conductor to the passenger compartment. This conductor is routed behind the left side panel inside the engine bay following the wiring harness that you will see that goes into the passenger compartment. You do not need to fuse this conductor as you on the negative side of the relay.
Now, what to do with this wire once inside the passenger compartment. I have a 360 Modena which has two blank panels in the center console with the hood (bonnet) release switch and the fuel door release switch. I used one of those blanks to mount my control switch. If you have a Spider, those panels are occupied, in which case you may have a blank position on your dash … maybe to the left of the steering column. But that position will require routing the wire to the back side of the dashboard.
You have two choices for a switch. You can get a Ferrari switch and use it (expect to pay $50 to $80 for a used switch and several hundred $$ for a new one). Make sure you get a latched switch and not a momentary-on switch. For example, the switch called the “Sport” or one that might be used to control lights (e.g., rear fog lights) will work fine. Do not get the ASR switch as that is a momentary on switch. I elected to use a non-Ferrari SPST toggle switch and mount in in the center console. Take the wire you routed from the engine bay, connect one side to a terminal on the control switch and the other terminal to any ground on the car to complete the circuit. When the control switch is open (i.e., in the OFF position), the ECU will control the bypass valves. When you close the switch, you are actually interrupting the circuit to the vacuum solenoids and leaving the bypass open all the time.
In an earlier post I included a schematic on how to connect the relay to the control solenoids. Check out that schematic. If you have difficulty, any competent automotive mechanic should be able to follow the logic.
Note the image of the mounting position of the relays is with the rear bumper removed.