slowscott

iTrader: (8)

Will aiming the dumps outwards help with the resonation at ~1500? Mine make it sound like a honda is chasing me for about 200-300 rpm on slow take offs.

thanks

lastcall190

iTrader: (36)

I have 'em angled out about 30*... I have the same sound you describe, but other than that, I can't complain, and IMO it's quieter than my LM was. Try a 45* angle and see if that helps.

-J

black_knight

iTrader: (1)

Make sure it isn't your trunk cover thingy rattling.

orangeapeel

iTrader: (18)

Dumps = rattle

That is just a fact.

black_knight

iTrader: (1)

It's not the dumps that rattle. It's everything that's loose in your car. I don't have anything loose, so I get no rattle.

slowscott

iTrader: (8)

Maybe it could be something rattling but i could swear it was the actual exhaust noise. I'll have to ask someone if they can hear it fromt he outside.

Ls1_axxxman

iTrader: (2)

Mine does the same kinda thing, its just the nature of the beast. No matter how you angle em, you're gonna get some resonation.

s346k

iTrader: (4)

mine don't do it.

perhaps muffler placement helps?

ClemsonT/A

iTrader: (2)

My duals dont make any sound that sounds even remotely close to a honda. I do have some rattles but I need to go under there and tighten things up a bit.

Fenster

iTrader: (3)

100% agreed. Of course I have Flowmaster Delta Flow 1 Chamber mufflers... so... yeah

I do get some resonance in the car about 1900 rpm for a split second if I am slowly accellerating in 6th gear, but thats it...

DirtyJohn

iTrader: (8)

I'm guessing the effects will be minimal, but ive always had mine turned out.
And yeah, i get that too, maybe not at that exact RPM range, but close.
I think its a frequency thing of the pulses, and unless you get the resonation out from under the car completely, its just gonna happen.

black_knight

iTrader: (1)

For the record, my setup has no rasp and has magnaflows with turn-ins. But if I leave that flap that covers the trunk down, it rattles with a very raspy sound. I leave it up for now, but I'm going to get some foam or something to shut it up. If I were you, I'd seriously look at something loose causing your noise. If not something in the car, then a loose heat shield or bad hanger. Duals should sound smoooooooth.

slowscott

iTrader: (8)

I think i narrowed it down to one of the passenger side primaries being extermely close to the body. Hopefully I'll have time to do some hammering today.

white_camaro

iTrader: (13)

angling the pipes at a 45 degree angle definately helped with my resonance and rattling. I also think it looks better, more professional.

orangeapeel

iTrader: (18)

That was my point. Just in a shorter set of words.

Azhigher

iTrader: (1)

Angling helped for me.