Help! Which direction do the glass packs go?

[Pokageek]

I look inside the tube and see lots of cut holes. They are open facing one direction and closed in the other direction. Is the air supposed to flow INTO the holes? OR into the closed side ..? Here's what it looks like below:

____________
< o < o < o < o <----is the exaust supposed to flow INTO the holes?
< o < o < o < o -----> or is the exaust supposed to flow not into holes?
-------------------

 

[Bens95cobra8594]

I don't think it matters with glasspacks. A friend of mine had some in a '57 Chevy (sorry) and he tried both directions. The tone just changed a little.

Maybe I'm wrong, but I really don't think it matters.

Peace and elbow grease!

 

[drakesdad]

I've never paid any attention....didn't think it was a certain way.........but I only put them on old trucks and jeeps................get ready for snap, crackle and pop..................I think I would run straight pipes before those on a stang...

 

[The Green GT]

straight pipes

Id make it flow INTO the holes to give you a littl more backpressure.

 

[Pokageek]

Thanks guys. I am learning more about them than I knew as I was doing a little searching. It seems some just have holes and some are "louvered."

These I am talking about are louvered. They look like this 0> 0> and they stick out a bit and protrude into the inside of the pipe catching the air .. Whereas the ones that are not louvered have less back pressure and are not pro-truding into the inside of the pipe.

Given that. I don't want to lose any or hardly any HP yet I am looking to cancel out a bit of the "drone." So considering I have the louvered type, should I put them in the direction where they are "catching the air into the louvers? o the other way where they are kind of flowing over the louvers and the air is not caught as aggressively?

Oh, also My exaust looks like this: headers->HIGH flow cats-> soon to be glass packs->2 chamber flows.

 

[The Green GT]

wait so you are gonn ahave glass packs AND flows?

 

[Pokageek]

Yep. My eyes are 20/10 meaning I can see objects at 20 feet that the avg person can't see until they are 10 feet up on it. My hearing is the same. I can hear like a freaking dog. So .. the drone goes right down into my ears.

 

[95five-oh]

Glass packs are meant to go with the holes facing forward, so that the exhaust flows into them and deadens the sound a little more and adds some backpressure. But of course you can put them on either way, my freind and I put LT's and backwards glasspacks on his 302 f-150...without cats. Sounded good but my god you could not take it on the highway lol.

 

[trav_19]

unfortunutly the previous owned liked the sound of glasspacks and my stang has them on it....first mod i am doing this winter is putting flowmasters on it....but if you want to run glasspacks put the louvers so they catch the air passing through them...:SNSign: