glass packs good or bad

[gagwag]

My friend is putting a glasspack muffler on his jeep and is urging me to do the same what are the pros and cons of glasspacks.

[River Beast]

sound is what you gain....minimal flow increase due to turbulence caused by the design of the baffles in them... high-flow mufflers are a bit better for performance

[joe]

Yup you gain a lot of noise. They'll also get louder as they get older as the glass stuffing burns out.

[dnixon]

BAD!!!! AND SOUNDS DISGUSTING! AND ITS ONLY LOUD WHEN YOU ARE FULL ON THE THROTTLE!

oh yeah i am not a fan of Glass packs...

GO get some flowmasters you will be very happy with those.... ;)

[ August 01, 2003, 10:29 AM: Message edited by: SLOwag ]

[Bob Davis '80 Chero]

Pass on the glasspacks. When a young'un we'd put glasspacks on (no turbo/flowmasters way back then!) and get'm good and hot and squirt water up the pipe to clear out the glass. In one word- LOUD. If that's what you want with the resulting headache from all the noise, this is what you want. Not a good way to spend a trip IMHO. And this is just my .02 worth.

[Glenn_tx]

I've got a single glasspack on mine with the stock exhaust exiting behind the back wheel, it isn't loud at all. Since I took of the air pump it doesn't even backfire anymore. Also alot cheaper than flowmaster.

[gagwag]

If I get flowmaster should i get 40 Series?Someone said it was the original and the best.

[dnixon]

I am not sure on the series numbers... I have the very first original one before there were any series numbers.. but its LOUD.. especially with the 3" exhaust.. I guess it just depends on HOW loud you want it to be.. I like mine it sounds real good at around 1000 rpms... I love it.. when I get into the higher rpms it just has a low tone that isn't very loud at all...

[Stuka]

The number one thing to remember about glass packs is they sound like CRAP when new! They take a lot of miles to break in. The hotter you get them the faster they will break in also. I got *SO* many compliments on the exhaust note on my 65 mustang. People where always surprised it had dual glass packs. My cherokee has a single glass pack and its really starting to get a good tone now that it has baout 6k miles on it.

There is two types of glasspacks also. Red and blue, they use a different design for the internal baffles. And flow is increased quite a bit over stock.

Also they are technically not a muffler, as they dont muffle the sound with baffles like a muffler does (flowmaster, super turbo, whatever). They are a resonator, and they cancel out sound by bouncing it into itself on the inside.

As for sound, i will record mine if anybody wants to hear it, would only take a few minutes. At idle it has a nice tone, cruising around at partial throttle it has a rumble that I really like. At WOT it gets quite loud, but still good sounding. The only time I dont like it is if I am at a lower RPM and have to give it the gas. Then it gets weird sound thats hard to describe, but it only gets it because it isnt fully broke in yet.

[imported_Big Red]

I liked my glass pack but it was years old. It was so old, that it was silver not red. Anyway I have a new type of muffler on mine and I will not buy anything else now. It is a Raven muffler. It looks and sounds like a flowmaster but about 75% as loud. It is also about half the price!!