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How best to quieten a noisy 3" exhaust?
Posted: Mon Nov 10, 2014 9:52 pm
by C-Gazer
RecentlyI installed a new 3" home made SS exhaust using a Magnaflow cat, 14" Magnaflow muffler and resonator on my turbo NB. The set up is slightly more noisy than the old mild steel exhaust it replaced and I was hoping to quieten the setup for street use say with a baffle/ silencer in the tip which I can remove for track days. What have fellow MX-5s done to their systems to enjoy quiet steet driving but have a full flow 3" exhaust for track days? Car Chemistry a US company recommends permanently installing their CC Baffle after the cat to reduce noise and not effect performance Has anyone tried this style of baffle?
Re: How best to quieten a noisy 3" exhaust?
Posted: Mon Nov 10, 2014 10:19 pm
by chrons_rotary
Either a tip baffle, or get a larger non-straight through rear muffler to replace the current one when on the street.
Re: How best to quieten a noisy 3" exhaust?
Posted: Tue Nov 11, 2014 1:28 am
by Okibi
I'm a fan of the varex mufflers but if a silencer will fit that'd be a cheaper option.
Re: How best to quieten a noisy 3" exhaust?
Posted: Tue Nov 11, 2014 9:36 am
by 16bit
i have a couple of glass pack tip baffles that work really well but they don't get made any more.
company was stebro but i think they are bust.
if you can find tip inserts they do work, well mine do.
not much help i know!
Re: How best to quieten a noisy 3" exhaust?
Posted: Tue Nov 11, 2014 12:49 pm
by rascal
I had my local exhaust shop add flanges just in front of the rear muffler.
Then made up a second exhaust with super restrictive (ie quiet) muffler.
This way can just swap between quiet & race mufflers with 5 mins work..
Re: How best to quieten a noisy 3" exhaust?
Posted: Wed Nov 12, 2014 7:46 pm
by SuperMazdaKart
For my Familia GTR 3" exhaust I had one of these put on.
