emilio700

iTrader: (3)

What about a metal core cat? Be a little PC and shave a few db.

m2cupcar

iTrader: (5)

We ran a dynomax bullet on a spec miata for years and never had a problem. But I can say that it doesn't cut the sound down like a big glasspack or cat.

Braineack

iTrader: (62)

I'm still good for 1.5 years. I'll be throwing a 200-300 cell spun metal core in there...eventually.

I don't see how one could collapse....all a resonator is, louvered or not, is a drilled pipe with a shell welded around it. the dynomax happened to have holes drilled out, while the louvers have slots punched in. Unless they use some thin *** metal and drill the too liberally, I don't see it happening.


as far as testing....this may be a good chance to finally put the magnehelic gauge i have to work...

StankCheeze

iTrader: (1)

That's what I meant, bullet muffler. We couldn't figure out how they collapsed either. The outside of the pipe looked perfect. The inside looked like someone took a pair of vise grips to a coke can. These were all mounted mid-exhaust with no cat, so our theory is that they have serious problems dealing with heat. I've seen it first-hand twice and heard about it from quite a few others.

Splitime

iTrader: (24)

I've also seen resonators and flex sections buckle inwards.

In fact... the rattle/vibration I'm dealing with is either a joint in my exhaust or something crapping out in my resonator already.

Hopefully I figure it out tonight.

m2cupcar

iTrader: (5)

Fortunately (or unfortunately) my massive exhaust rattle turned out to be the heat shield on my universal catalytic converter - which is being swapped out for my 200 cell metal core this weekend... if the USPS decides to finally deliver my flanges.

urban

iTrader: (2)

yup, thats official

Braineack

iTrader: (62)

Going with clamps for now untill I can get it welded. Simply shoving it on my tailpipe and it reduces the overall volume just a tad, removes a but of resonance so it's not so annoying, shoudl be good. should have it finished in a bit, it's hot as a coffee mug out there!

miatamania

iTrader: (9)

It does help smooth out the sound a bit...not sure if it makes it quieter.

Braineack

iTrader: (62)

Drove about 45 minutes in stop and go traffic, much improved. The loud ricer whine is gone when I get in boost, and the overall booming resonance of the exhaust is gone. I iz happier.....I'll get some vids tomorrow when it's not raining.