Exhaust system noise - help please.

Miata Parts, Intakes, Superchargers, Headers, Exhausts, Shocks, Springs, Sway Bars, Brake Kits, Autocross and track mods.

Re: Exhaust system noise - help please.

Postby FrederickU633 » Tue Aug 14, 2018 8:15 am

I recently had the Max Power exhaust with ceramic header, Helmholtz mid pipe, and Super Q exhaust installed on my 2013 NC Club. I am experiencing the same high frequency metallic buzz under moderate acceleration from 2000-3000 rpm. It is a very annoying sound and greatly detracts from the exhaust note under other rpm/loads. Am I to infer from the posts that I need to remove the Helmholtz and install a traditional mid-pipe?
Please advise.
Posts: 1
Joined: Fri Jul 27, 2018 10:14 am

Re: Exhaust system noise - help please.

Postby Brian » Tue Aug 14, 2018 8:25 am

No, buzz is usually the description of heatshield issue. Run it on lift to track the source. In the end I think Ian's car has unusual engine noise which he is absorbing with more fiberglass, I will video his Helmholtz on return on my healthy 2007 and my bet is it makes zero extraneous sounds.
Brian Goodwin
Good-Win Racing
Site Admin
Posts: 8769
Joined: Tue Feb 15, 2005 11:44 am
Location: San Diego CA

Re: Exhaust system noise - help please.

Postby ArmS312 » Fri Dec 07, 2018 12:02 pm

I had the same issue. While doing my transmission swap I looked at the parking brake lines and one of them was in contact with the heat shield under the gas tank (right before the diff). I adjusted the parking brake lines and the sound disappeared!
Posts: 2
Joined: Tue Jun 19, 2018 2:42 pm


Return to Mazda Miata and Fiat 124

Who is online

Users browsing this forum: No registered users and 3 guests