i need an extremely quiet muffler for my gsl,
im gonna go ahead and put my header on it but i want it to be quiet,
im not to concerned with exhaust flow,

so whatever the quietest muffler you have heard post it here,

also preferably under $100.00

 

Exactly what i am looking for

jr

 

here ya go, not sure about the price tho

 

You could get one at a muffler shop for around 80 bucks and it might last couple month or so before it burns out from the much hotter exhaust of the rotary, I had one last me about 3 and a half months, it gradually got louder and louder. Then I spent the extra money and got one from Racing Beat. Their Prima Flow mufflers are pretty quiet on a stock engine and added with the presilencers, which I haven't used myself, but by the name, I'd say they would quieten things down pretty much. Granted, these mufflers r expensive, but u'll never have to buy another one, unless of course u sell the car with it on it. Or u could get another stock one from a junk yard, I've done that too.

 

Why not stock?

 

Because Stock is great when the car is stock. When you have headers and a straight pipe to the exhaust (muffler) it sounds like the infamous "chainsaw on crack".

For an upgraded exhaust, you need an upgraded muffler.

I agree with the previous posts. Go Racing Beat Primaflow. It sounds like stock at idle, and only slightly deeper and louder while accelerating.

 

hmmm....
under a $100.00
under a $100.00
under a $100.00

people always miss that ****,
then when everyone says theres nothing cheaper i always find it,
post it,
then am thanked for it.

why me?

 

I've got a 1982 honda accord presilencer, and a canadian tire $39.95 canuck bucks muffler, and it sounds deep, and pleasing to the ear, and hasn't burned up yet (after 3 months of spirited driving, and high temps)

Jeff

 

free at my house just pulled an aftermarket off that worked with headers and a striaght pipe

 

get me a pic,
if it looks nice i'll throw you some cash to send it up my way whenever you get the chance

 

You don't need a muffler, just weld the pipe shut, that'll make it REAL quiet.

 

I was wondering if adding a resonator to the system would quiet it down some, and cool the exhaust temps down a bit. The stock set up has two pre cats a main cat and a huge freaking muffler. that equals a lot of open space for the gases to expand as well as loads of area to be quieted down. If an after market exhaust system removes the pre cats and changes the main out for a smaller model I suspect that explans the huge increace in volume that us poor bastards who can't afford $400++ exhaust systems live with. I am going to have my exhaust shop try to incorporate a fairly good sized resonator after the cat to see if that will bring the noise level down. on a different note, can anyone tell me why a rotory is so much hotter than regular motors? I know they rev high and that they fire 3 times per rotor every revolution. I can't belive that thoes two things alone account for us being that much hotter than a high rev 4cyl or a really souped V8.

 

A hemi muff..

 

A couple more factors on the heat. First, rotarys do not
have valves, or heads to absorb some of the heat. Also,
the exhuast port sleeve prevents heat absorbtion by the
rotor housing, thus forcing more heat downstream.

Also I have the old "Rotary Engineering" exhuast on my '82. It consists of a header, 2 stainless steel glass packs to absorb some heat, and then a boinger turbo flow muffler in the back. I have put over 30,000 miles on this system nad the muffler is still good. Very quiet, very mellow no "tinny" sound at all. I like it!

 

well another factor and the biggest for heat is the fact that the engine likes to run rich.
thats why it spits flames when you change the exhaust and remove the smog pump,

it sounds like your muffler might do the trick,
i dont want that metallic noise

 

That has very little to do with it. Rotaries are much more thermally inefficient than piston engines. Even though there's a 50% longer burn than a piston engine of the same RPM, it's harder for the flame to burn quickly enough because of the poor chamber design (inherent in the rotary) and this causes EGTs to be much MUCH higher than a piston engine. Even when a "perfect" mixture burns completely it is still very hot when the exhaust port opens.

My header and the first half of my midpipe were bright blue after a day of hard running. Pretty cool to look at.

 

The stock muffler is part of a system. The stock exhaust manifold is part of the system. So are the converters. (On '79-80, the thermal reactor and heat exchanger approximate the sound-reduction qualities of the exhaust manifold and heat exchanger)

When you remove the front half of the exhaust system and put on a header, you are also basically removing three of the "mufflers" in the exhaust system.

 

well, i was going to take a few quotes from some of the earlier posts, but i'm too lazy to cut and paste now ...

so ... here goes my two cents ...

finding a "good" muffler for less than 100 bucks is not an easy thing to do. it can be a pain, but they do exist. i'd still recommend the RB mufflers over any of them, but i used to run a Walker/Dynomax Super Turbo and it was strong enough, but it was just a bit louder than the RB unit or the stock muffler. i think the key to keeping quiet is getting something 2.25 inches or less and you must use some sort of presilencer. i think the key to strength is making sure that it's not packed with anything but stainless steel wool, and it must use thick-walled steel at the very least. for the guys running glass mufflers ... i promise you ... it's just a matter of time.

the Rotary Engineering system wasn't stainless steel. it was powder-coated regular steel. and they are pretty strong and pretty quiet for the steet, but if you run out of tune, they WILL be destroyed! when i did my first 13B swap, i had to tune the Dell'Orto, and there was a backfire ... it blew up all 3 mufflers in one shot, and the one at the end (the turbo-type one) actually got torn into 2 pieces!!! but besides that, they're not available any more since Rotary Engineering no longer exists. however, you could re-create that system with parts from various sources.

i thought that exhaust temperature increased as you leaned out ... not getting rich???

i think i covered everything that i wanted to cover ... exhale!

 

im only quoting racing beat
e-mail them and tell them there wrong

 

Kinda off the subject, but I want to deepen the exhuast note on my bridgeport with a better then stock replacement muffler. I however, DO NOT want a 4" hole in back. I hate that look, its not a honda. I'd be cutting out the stock muffler and wielding in a better one. Any sugguestions on brands and ones that look stock. I like the dual look, but want a deep note.

 

Get the Racing Beat muffler. Quite, durable, and it makes good power. It's over $200 new however.

 

When my 85 GSK overheated, I had the egine ported and an aftermarket, racing exhaust system put in (this was back in 94. One of the reasons I eventually got rid of the 85 was that it was just so damn load. My girlfriend at the time (now wife) said she could hear me coming from a 1/4 mile away. When I hit the gas it sounded like a hotrodded lawn mower.

So my question is, when you guys say quite (i.e. - Racing Beat muffler is quite) is it on par with the noise level of a stock muffler?

Thanks!
-Mike

 

easy the quietest muffler is the 80mm (3.15") racingbeat/mazdatrix. sure its a straight through prescilencer and its not under 100$ but it did quiet down my turbo noise and make my car bareable to drive around the blocka few times.

 

My merkur seams to be a lot hotter than my mazda. No way for all the turbo's heat to escape...and they go through exhaust manifolds and batteries like mad! Just a quaint little 4 cylinder turbo, lol.

It's hard to find a good quality header that will not crack!

Wacky Rotary: Unless you have a turbo under that hood you wont need a 4 inch tube coming out of the back of your car.
It's just rice

 

I was told that the Dynomax mufflers will hold up to the heat the Rx7 makes. The car I bought has one on it,
It is a streetported motor, header, cherry bomb, dynomax muffler. This car is VERY loud and can be heard 2 miles away and not even getting on it hard.
Do not know how long it had been on there but it seems to be holding up.