Switched the muffler out on the car to make it quieter.
The previously installed muffler was a motorcycle muffler which featured two types of glass packing surrounding a straight thru steel mesh tube. I opened the muffler up and found that some of the glass packing was blown/burned out in a few areas. The canister of this muffler is about 18” long with a diameter of 4.5”. This muffler was very loud and had a lot of drone at idle. It did sound awesome when the throttle was full on.
Installed a newer muffler. This one is off a motor cycle. It is longer than the old one. When you look down the pipe there is a mesh tube and what looks like a baffle, so it is not a straight thru design. The muffler is labeled Yutaka 2334 and seems to be off of a Honda CBR600. The muffler has a 2-2.25” inlet and a much smaller outlet. The muffler is a lot quieter and should be quiet enough for the inspector.
Had to find and issue with the brakes that the mechanical inspector noted. Symptom observed was brake pedal slowly lowering when pressure is applied.
Looked around for a while, and found that brake fluid was leaking slightly around the proportioning valve I have installed. I purchased the adjustable prop valve from Flyin’ Miata, and it came with metric M10x1.0 to SAE adaptors, as the Miata brake lines are metric and the prop valve is SAE. The fluid leak appeared to be between the adaptor and prop valve body. I tightened the rear and began to loosen the front brake line when the adapter sheared off. Will need to get more adapters and am looking at getting a different adjustable proportioning valve that has a built in sensor to indicate when there is hydraulic fluid pressure loss/differential from front to rear.
Hooked up the brake system and found a leak at the willwood proportioning valve again. Took a look at the CPP prop valve I ordered from summit tools and the front and rear plumbing are seperate so we used the CPP prop valve to just run the rear brake lines thru. Hooked it up and bled the brakes to get all the air bubbles out. Went thru about .5 litre of brake fluid. Brakes are firm now with no leaks at the prop valve or elsewhere.