One of the main reasons I failed the first noise test was induction noise. I had a pod filter directly connected to the throttle body, with no air box or resonators. When you nudged the throttle, you could hear it take a breath and gulp air in. On sharp throttle inputs it made very impolite noises, and on wide open throttle it whistled like it had a turbo. To fix all of this I have plumbed in a factory airbox and resonator up in the nose cone, and the routed air piping back to the throttle body. This is the 2.75" aluminum and blue silicone joiners you can see in the photo. Because of the height of the engine and the intakes on the passenger side, I have had to route this plumbing down the less ideal drivers side, directly above the exhaust headers. To deal with the heat, I have fabricated brackets to keep the plumbing off the headers, and also some additional brackets between the block and the chassis. These are to hold up a heat shield that will keep the headers and the plumbing separate.
The net result is that there is now zero induction noise at idle, and no change in noise for any throttle position....problem solved!
p.s. Also noticed we passed 10,000 page views this week! Thanks to everyone who has followed this build and checked back in on the progress.
