Exhaust Tone

[Superdave]

glasspacks are insanely restrictive, you'd be better off putting a cat on it.. lol

[PCGUY112887]

Really? Do they get small on the inside or what?

[98malibu3.1]

Really? Do they get small on the inside or what?

They have a louvered core and yes, they get very small on the inside. Try a Magnapack from Magnaflow. I suggest a 4" round by 18" long in whatever size inlet/outlet you need. If that doesn't fix the rasp then you may need a cat as well.

[Superdave]

they flow less than 200 CFM whereas an aerochamber flows like 441 CFM...

[Azrael]

Most of the cheap glasspacks are bad for flow. I have a cheap cherrybomb one right hear that's ment for 2.5" pipe but it tapers down to a 1.9" diameter internally.

[Rhedalert]

I have dual aerochambers, but in 2" pipes (after the Y split) with a basic aftermarket resonator, and a hi flow cat. I get no rasp at all, although idle is a tad too loud.

[PCGUY112887]

Humm now to figure out, is it the highflow cat or the resonator taking away most of the rasp...

I rather not put in a cat if I don't have to. What kind of resonator do you have?

I really need to get a vid for you guys... school and work makes me busy!

How much will a (small?) exhaust leak change sound? I think the weld where the pipe splits is leaking on the bottom, since last time I looked when I started the car up it spit out moisture from the bottom that area.

[pontiacdohc@gmail.com]

if it sounds any thing like my car when you fix it let me now what you did cuz i hate the rasp over 3k

http://vids.myspace.com/index.cfm?fuseaction=vids.individual&VideoID=7817426

link ^^^^^^^^^^^^^^^^^^^^^

[PCGUY112887]

It's very hard to make out the sound in that video... but mine sounds different.

You have a DOHC and I have a cammed pushrod, so our sounds are going to be a good bit different.

[pontiacdohc@gmail.com]

i still dont understand why mine sounds like that all it is two 2 1/4 summnit turbos with no cat! is it the 24 vavle that makes it sound like that

[IsaacHayes]

I'm betting the cat will help the most.

[PCGUY112887]

Maybe... but that is also the most expensive method. Makes me mad that I went to the trouble of going to a place that would do no cat illegally for me, for it to now work against me.

I was looking around at cheaper methods, what about a dynomax bullet muffler? Looks good but I fear it won't do enough...

[2.8RS]

I have a Magnaflow universal muffler on my Camaro with a Magnaflow highflow cat and that helped out alot with rasp. It's a stock 2.8 but you really don't notice the rasp till ~4200 RPM. I don't have a vid but I could make a quick one tommorrow.

[PCGUY112887]

Well in my efforts to stay catless (since I figured out I would have to move my wideband if I wanted to put a cat in)... I found this

http://vibrantperformance.com/catalog/product_info.php?cPath=1021_1033_1055&products_id=46&osCsid=3a19d1cc45ca012cc8a20c891a688563

Anyone ever heard of vibrant performance? It's not the cheapest resonator but it is the biggest.

[Superdave]

a hi-flow cat is like $50.. MUCH cheaper than that resonator.. LOL

o2 bungs are about $5-$10 on Summit IIRC