Re: Glasspack installation (Was: Dynomax Thrush Glasspacks)

Chaseman · Post by **Chaseman** » Sat Dec 06, 2008 2:32 am

I just bought a 18" glass pack for my bone stock 1966 mustang 289 and my question is which way do I put it in? With the Louvers ( it's not perforated inside ) in the glass pack going with or against the exhaust .

td · Post by td » Sat Dec 06, 2008 8:21 am

Chaseman,

i would think against the flow, otherwise what muffling affect would it have? just my

i could be wrong. mabe someone else will chime in

willowbilly3 · Post by **willowbilly3** » Sat Dec 06, 2008 8:41 am

It probably won't make any difference. Does it go in the rear? Those old Fords with the mufflers back by the bumper sure have their own sound, kind of a moaner.

heep70 · Post by **heep70** » Sat Dec 06, 2008 10:44 am

I beleave if you install against the luvers it will be quieter and with the luvers it is louder.

Dragon · Post by **Dragon** » Sat Dec 06, 2008 12:40 pm

The leavers point forward or the muffler will be just a restrictor for no reason.

Chaseman · Post by **Chaseman** » Sat Dec 06, 2008 4:03 pm

willowbilly3 wrote:It probably won't make any difference. Does it go in the rear? Those old Fords with the mufflers back by the bumper sure have their own sound, kind of a moaner.

Yeah it is in the rear and with the oem style muffler on now ( that clangs and makes internal noises , just wearing out ) it does moan when I really get on it.
I added pictures of a louverd glasspack and a perfoated one. :Note the two glasspacks in pictures are different sizes.

Also to add something , I would have gone for a nicer quality muffler rather then a "summit glasspack" but I have a complete 2" H piped dual exhuast (from a 1973 mach 1) waiting for me down at my dad's house.
Which will be one of our summer projects.

papabug71 · Post by **papabug71** » Tue Dec 09, 2008 3:35 am

Odd. Mine have always been installed with the louvers facing back

. Always sounded good, but thet were always 30" or 42" monster glasspacks.

fireguywtc · Post by **fireguywtc** » Tue Dec 09, 2008 11:49 am

Direction is optional depending on the sound you desire. They can usually go either way in my experience.

Fordlorn · Post by **Fordlorn** » Fri Dec 12, 2008 7:03 pm

I've noticed the FE motors are much quieter than SBC engines. You put glass packs on a SBC and it is LOUD! You put them on an FE motor and they are nice and mellow. Just my

.

Dragon · Post by **Dragon** » Sat Dec 13, 2008 1:32 pm

I found that out too. I also discovered that a new F150 non company truck with louder than stock mufflers gets a ticket when my F250 can make over twice the sound and gets ignored.