difference in glass packs

Can some one tell me the difference between an 18" and 24" glass pack? Beside the obvious 6", is there a difference in sound? performence? or if it matters if its going in a straight six or v8?

 

The 18" goes............ pop pop pop pop....pop

The 24" goes............ pop pop pop pop pop pop pop.......pop pop

 

I like that definition.

Thats about the way it goes.

V8 is going to have a lower tone, than lets say a flat six.

Just that extra 6 inches is going to muffle most of the nasty back pop noise and such.

My brother had his 18's dump in front of the rear wheel on his tug boat buick and they crackled like crazzzy.

 

The 24" will be a little more mellow than an 18" but it does depend a lot on the what you put in on and the brand of glasspack.There are soundbites on youtube.com of the different brands.

 

I have the 18" on the hemi, and it sounds great. I just picked up the 24" and was gonna put in my F100 with a 223 inline.

 

The longer they are, the more mellow "furple, furple" sound you get, as Harry Bradley used to say...

 

Ive welded them on back wards un-purpose to make it louder the glass smittys have perforated holes like a cheese grater so by mounting backwards they pretty much bypass the little holes and make a quick escape out the back. Another trick is to get them warm (take a nice 15-20 drive) and then go back and poor cold water in them this makes the fiberglass inside bust apart to be louder! oh by the way i think smittys are the best.

 

I like CHERRY BOMBS... They've been disturbing the peace since 1968...

 

Thanks fellas. I dont think Ill be pooring water in them, my neighbors are all pretty kool.

 

......Smitty's seem to work the best for me......they also last longer than the cherry bombs......also sound nice too......

 

It's SMITHY'S Fellas, not Smitty's

And Smithy's have been disturning the peace since 1928

 

I like their slogin.... Years ago I had a set that had a header flange welded on the inlet end... I wonder if Cherry Bomb still makes those??? Those type were great if you had plenty of ground clearance... Loud as hell too!

 

Don't know but Patriot does, had been since the 60's.

 

is there a difference in sound? performence? or if it matters if its going in a straight six or v8?

I tried a few differnt setups on my Ford Small Block Six builds. Longer Smithys definitely worked out best. Sixes are prone to drone at cruise and trad' glasspacks especially were bad. "turbo" baffled mufflers were raspy as hell, NAPA generic 2"I/O roundys' made hot cam six sound like an old truck.
On my daily driver, I wound up with two stock mufflers for ear comfort. With the duals still 1/2 the backpressure (?) .


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( hmmm, prone to drone - I like that)

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all depends on what ya wanna hear

 

I really wanna get Smithy's for my wagon. 350 SBC...and could use a hotter cam..but have been wondering about what length I want.

 

Here is a vintage pair of steel packed mufflers. Manufacturer unknown - 30in body.

 

when i decided to get glasspacks and twin pipes for my 1960 Buick (V8, 401 cid), the local shop (Abel's Muffler in Kansas City, KS) threw on there what they carried in stock--- 2 IMCO 22 inch glasspacks, and they're just fine.. not too loud, a nice low tone that compliments the car nicely.. a lot does depend on the engine, and how far back the mufflers are, and their length as well, plenty of threads on this subject.. look for one that's called "is there such a thing as quiet glasspacks" or something like that..

 

Thanks jazz

 

So have I =D

 

Has anyone tried these?

http://www.etrailer.com/Mufflers/MagnaFlow/MF18129.html

Of course a 3" inlet would be massive, so a guy would have to bottleneck it down.

OK, I found one a little more manageable.
http://www.autoaccessoriesgarage.co...hopping&utm_term=Magnaflow-Glass-Pack-Muffler

 

From what I have gathered, The longer the glass pack is the quieter they are, but like some have all ready stated, some have little indentations(small baffles) on the inside that sort of create a vortex and you don't really want those.

 

as others have said, the shorter the louder. BUT and this is a big but, its all where you put them at in the system. I have a 352 with headers, 2.25 duals and 12 inch glass packs, 10 inches is the actual case of the muffler and they are right in front of the axel of my F100. Then the pipes are straight out the back under the bumper with 2.5 inch rolled tips and it sounds good. Its not redicoulus at all like I thought it may have been because of where I put them.

I put 18k on my truck last year, LOTS of highway trips with some of those being 6 hrs at a time all the way to FL and I love how they sound. I want to try some porters on another project, but they are pricey compared to cherry bombs.

 

Jeez, lots of work to tune a brand new muffler!
In case anyone else is interested, Brockman Mellowtone makes 'packs in many different lengths, and in glass, steel, or no packing at all! How's that for choices?
I've got NOS Smithys on my 55 Olds since '82, bought them off a guy In Carlisle. Brocks sound just as good, and have used them on all my customs since. The newer Smithys, IMHO, don't sound the same.