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patriot sidepipe glasspacs burnout.
#568459 June 14th 2012 9:30 am
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jjames Offline OP
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i have the patriot shielded sidepipes, they look and sound great new, however the glasspacks burnout every every 6 months or so. so i have to get a replacement muffler. is this a typical problem with glasspack? maybe i should go with something else like flowmaster, that doesn't use a glasspack. any suggestions?

Re: patriot sidepipe glasspacs burnout.
jjames #568461 June 14th 2012 9:53 am
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Glass packs are supposed to burn in after a few hundred miles. Thats where they get their sound from. I usually look for old sets of glass packs in the JY when i go, cuz the old burned up ones usually sound the best. If you dont like the sound, then i'd say go for a flowmaster or equivelent.


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Re: patriot sidepipe glasspacs burnout.
draggnastro #568484 June 14th 2012 12:23 pm
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so i guess they're expected to burnout, and get louder. but there seems to be some disagreement whether they sound better.

Re: patriot sidepipe glasspacs burnout.
jjames #568504 June 14th 2012 1:58 pm
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i wonder if my engine is running to rich?

Re: patriot sidepipe glasspacs burnout.
jjames #568511 June 14th 2012 3:03 pm
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Any muffler that uses "glass" to get that "glass pack" sound or to help control the "loudness" as some people put it will in time blow out the "glass" and get louder. Not just the "glass packs" but a lot of the brand name systems also use glass and they will all get that "throatier" sound in time.....As for if that "sound" sounds better is just a matter of opinion...... same as anything..........not better, not worse, but just different.......

Last edited by soundhd; June 14th 2012 3:05 pm.

Recently purchased (10-2021) a 1991 Chevy G-20 “Shorty”. Past vans are a 1976 Chevy G-10 (purchased new in 1976 & sold in 1995). A 1978 Chevy G-20 Shorty purchased in 2010 and sold in 2015.
Re: patriot sidepipe glasspacs burnout.
jjames #568523 June 14th 2012 4:21 pm
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If it smells really strong of gas or the tips of the plugs are dark brown or wet then its running rich.


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Re: patriot sidepipe glasspacs burnout.
jjames #568553 June 14th 2012 5:34 pm
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i'll have to pull a plug, i guess. i do get black smoke at times, and the tips of,the exhaust pipes are black inside, no cats. 9-10 mpg city driving. a gassy smell at times, but i couldn't say it was strong though. engine is a 350.

Last edited by jjames; June 14th 2012 5:35 pm.
Re: patriot sidepipe glasspacs burnout.
jjames #568926 June 16th 2012 1:49 pm
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had a broken plug in one cylinder. looks like detonation. replaced plugs. exhaust is sounding much better now. gonna start using 89-91 octane gas from now on.

Last edited by jjames; June 16th 2012 1:51 pm.

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