Glas pack internal sizes
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From: Central TEXAS
Glas pack internal sizes
I got 2 free newer glass packs and the pipes attached to it are 2 -1/4" I am going with 2-1/2" system and was wondering if the internals were the same on all glasspacks of the same brand. For exaple, when I look at the specs for a cherry bomb it shows the same dimensions for everything like muffler OD, etc (except for the length of course). Could I just weld my 2-1/2" pipes to these or is the internal size smaller because it was originally for a 2-1/4"? I'm not sure if I'm being 100% clear on this question.
stephen
stephen
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From: Metro Detroit (Redford)
If it has 2.25" pipes, probably is 2.25" in the bombs also. Can you see down them with a flashlight? Bend a wire for a end width and run it down and see if you get binding inside.
You're going 2.5 inch on what? Single pipe I hope. Duals will likely be too much at 2.5 inch unless you have a 460 or something like that.
You're going 2.5 inch on what? Single pipe I hope. Duals will likely be too much at 2.5 inch unless you have a 460 or something like that.
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From: Central TEXAS
ok, a little more info. It is a 460 with about 400 hp. Yes, I am going true duals. Let me restate my question. If I had 2 cherry bomb mufflers, one with 2.25" in/out and the other with 2.5 in/out. Would the internals be the same? The cherry bomb book shows all the OD's to be the same, just the overall length to be different. Since all the other dimensions are the same I would assume the internals would be the same. I want to use these 2 cherry bombs on my application (2.5" true dual)
stephen
stephen
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From: Metro Detroit (Redford)
If thy are actual "Cherry Bomb" brand, then check this out:
http://www.greenfries.info/Resonator.htm
Guy tore Cherry Bombs apart and determined 1) they are cheap, and 2) they are restrictive.
I would want to ensure you don't restrict that 460. It is not worth the savings IMO and you should seek out some quality mufflers of the correct size for your engine. Check out they have Cherry Bomb type at flowtechheaders.com as well as the Purple Hornies. Many options for good mufflers out there. Actually, Hooker may have better mufflers than Flowtech (both owned by Holley). Call their tech person and discuss. They can tell you which mufflers/bombs will last longer and which will be non-restrictive. A few phone calls can save a lot of grief.
Lastly, can you run a wire down the bombs? Take a coat hanger and bend the end to 2.375" wide (should be the ID of a 2.5" pipe) and see if it will go through. Bet not. I bet those free bombs are 2.25 at best. You can put them up on Ebay or put them on wifes car--haha, wouldn't she love that!
http://www.greenfries.info/Resonator.htm
Guy tore Cherry Bombs apart and determined 1) they are cheap, and 2) they are restrictive.
I would want to ensure you don't restrict that 460. It is not worth the savings IMO and you should seek out some quality mufflers of the correct size for your engine. Check out they have Cherry Bomb type at flowtechheaders.com as well as the Purple Hornies. Many options for good mufflers out there. Actually, Hooker may have better mufflers than Flowtech (both owned by Holley). Call their tech person and discuss. They can tell you which mufflers/bombs will last longer and which will be non-restrictive. A few phone calls can save a lot of grief.
Lastly, can you run a wire down the bombs? Take a coat hanger and bend the end to 2.375" wide (should be the ID of a 2.5" pipe) and see if it will go through. Bet not. I bet those free bombs are 2.25 at best. You can put them up on Ebay or put them on wifes car--haha, wouldn't she love that!
Posting Guru
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From: Rio Rancho USA
With 400 hp you obviously put at least SOME money into the engine. Dont cheap out on crap mufflers that will kill flow.
I have been warning about this for a long time. Cheap glasspacks are just that- CHEAP.
I have been warning about this for a long time. Cheap glasspacks are just that- CHEAP.
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From: Central TEXAS
actually I got by fairly cheap- just had to look hard for deals. I personally like the sound of glasspacks and these were free. Maybe its a small town country farm boy thing, but i like the sound. I didn't realize that they kill flow that bad. I will look for something else. Thanks for all the advice.
Posting Guru
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From: Rio Rancho USA
Not all glasspacks are created equal. There are good ones out there. Just do some research into what you are buying and you should be fine. Usually just looking through a glasspack will tell you if its restrictive or not.
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Hotshot
Joined: Mar 2007
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From: Pa
Dynomax Welded Ultra-Flo mufflers have a glass packing (Oval and Round Available) and are of better quality than a regular round glasspack muffler. You put some coin into your truck, don't cheap out and put on crappy mufflers.
Stick the free glasspacks on an old tractor.
Stick the free glasspacks on an old tractor.
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From: Metro Detroit (Redford)
What about stainless steel wool packing instead of glass? I believe they make the SSW for motorcycles, but do they for cars?
My pref would be not do the glass packs as I hear too often the glass gets bad.
Something like a chambered muffler would be good.
Check out Hooker Aerochambers or Bear River Converters.
My pref would be not do the glass packs as I hear too often the glass gets bad.
Something like a chambered muffler would be good.
Check out Hooker Aerochambers or Bear River Converters.
Hotshot
Joined: Mar 2007
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From: Pa
Originally Posted by TallPaul
What about stainless steel wool packing instead of glass? I believe they make the SSW for motorcycles, but do they for cars?
My pref would be not do the glass packs as I hear too often the glass gets bad.
Something like a chambered muffler would be good.
Check out Hooker Aerochambers or Bear River Converters.
My pref would be not do the glass packs as I hear too often the glass gets bad.
Something like a chambered muffler would be good.
Check out Hooker Aerochambers or Bear River Converters.
I personally like fiberglass packing, I think it makes the muffler sound better as it wears out. He likes the glasspack sound, so I figure a glass packed muffler would get the sound he was after. There are good chambered mufflers on the market as well.
I don't know if theres a muffler out there that would sound bad on a 400hp big block V8.
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From: Rio Rancho USA
Steelpack mufflers sound really good. Very different from a regular glasspack, IMO. The last time I heard them was on a stock 289. Deep rumble at idle, and an absolute roar at WOT. Sounded much bigger than it really was.
Problem is they can be very hard to find.
Problem is they can be very hard to find.
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From: Metro Detroit (Redford)
Originally Posted by kens64
Problem is they can be very hard to find.
I suspect fiberglass would give a muddy sound if not just right.
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From: Central TEXAS
In highschool we used to get the glasspacks hot and then shove a water hose up the tailpipe and hit em with a hammer. We were trying to make them louder, thinking there was some glass (window like) that we could remove.
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From: Rio Rancho USA
Originally Posted by TallPaul
And costly, I bet. Gotta be stainless or will turn to a pile of rusty powder.
I suspect fiberglass would give a muddy sound if not just right.
I suspect fiberglass would give a muddy sound if not just right.
Last edited by kens64; Nov 15, 2007 at 02:48 PM.
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