Exhaust Question

[junkydogg]

Wondering what to do with my exhaust, does it pay to buy a high flow muffler or just run a straight pipe in place of it?

 

[VinPecora]

Go with the pipe, sounds good, not to loud at all.

 

[junkydogg]

anyone know if this will have any effect on emissions? or backpressure?

 

[GM TURBO]

Muffler will have nothing to do with emissions and the reduction in backpressure will help spool faster. I am doing it and have had no issues at all.

 

[TurboRob]

My exhaust is stock from the converter forward with a straight pipe from the converter back. It definitely isn't too loud, but I do think it drones too much at highway speed for my tastes.

I plan on ordering an ATR exhaust from RK when I get around to it.

 

[Zac]

On 2002-04-09 09:52, GM TURBO wrote:
Muffler will have nothing to do with emissions and the reduction in backpressure will help spool faster. I am doing it and have had no issues at all.

Before I went for a ride in Daves truck, I wasn't sure that I would like no muffler. I thought it would be to loud. After riding in Daves truck, the straight pipe would get my vote. It isn't that loud and it sounds good.

Chris

 

[junkydogg]

Thanks For All The Info. I Appreciate It.

 

[AXXE]

If you go with the straight pipe, you may start to overboost, especially when it is cold out. I had that problem with a Dynomax muffler.

 

[junkydogg]

have alot of you experienced the overboost problem especially when cold out due to no muffler?

 

[Ian Turgeon]

id say alteas half the exhaust opening mods seem to result in overboosting and worsened boost control on the stock turbo/wastegate.

 

[sy1765]

my truck has had no mufflers or pipe past the cat for more than 6 months. i do suggest getting the pipe for your ears' sake. it is muthafukin loud and resonates the cab. boost control hasn't been an issue.

 

[CrazyAl82]

My exhaust is stock now, if i got the complete ATR exhaust (headers, downpipe, muffler,cat) and a new wastegate would that lessen the chance of overboosting as opposed to a straight pipe from the cat back?

 

[1TiTeTy]

that will keep your wallet from overflowing....

 

[GM TURBO]

With the ATR stuff - having the aftermarket wastegate will help. Overboosting can be cured. Some trucks are probably more prone to it than others. I was very fortunate and didn't have any when I went to the straight pipe. You might have some droning at highway speeds. I think mine is loud if riding in the back seat - but how many of us actually ride in the back seat? I don't even remember why I was. Hardly seems fair.

 

[InvisiBill]

Different people have different results. Some can practically take off the entire exhaust and not have problems, while others get mad overboost just by gutting the cat. In general, a less-restrictive exhaust will make boost harder to control, and the stock system can't handle much more...

 

[JustBeachin]

My Syclone came with a Cat, but no muffler(from the factory). The pipe that runs back from the cat has come loose from the cat, and is full of holes. It's a lot louder then my Typhoon. I'll probably take it down to the muffler shop and have them put a pipe from the cat back, and then see how it sounds. If it's too loud, I guess I'll need to put a muffler on it.

I did take it out for a few WOT runs, and you definitely hear it spooling up, and then hear it at WOT. I guess it won't be a sleeper if I don't put a muffler on it.