With the wiring diagrams all now sorted out I turned my attention to the exhaust. Because I'm told that I still can't do too much physical work I turned to the trusty Fusion 360 to make sure all the sizes I had worked out were correct....
You can quite quickly see why I did so much work to the rear floor of the car and the weird design I have decided to go with for the silencers. There are a couple of reasons for this. Side exits are crazy loud as they act as megaphones, to keep the build as compact as possible first for weight, secondly because even with all that work there isn't enough room for more silencers.
The system design goes from the GT40 at 3" and cones up 3.5". The 3.5" then runs all the way back back to the Y pipe where it splits into dual 3" and into the two twin loop mufflers before allowing the noise to escape through the 2" x 5" oval tips. Conventional straight through inline pipes we all know and love as I said in a side exit configuration is very loud. Inverted multi-layer expansion-type silencers widely used by car manufacturers provides stable silencing. This is where the sound/gasses passes trough several divided silencer chambers but has the disadvantages of power loss, larger and heavier than other silencers. As a result of our quest for the ideal design for racing engines, Mugen developed the "twin loop-type silencer," in which the pipe is twisted into two loops and passes straight through the silencer twice. This could be considered the best arrangement as it combines uninterrupted free flowing pipes with a larger amount of sound absorption.... but proof will be in the pudding once it built...
Some pics.... I did get a little carried away in the end!!!!
