does anyone know how much extra hp an ss/sc will gain with an electric exhaust cutout???

 

what mods do you currently have?

 

Do not post the same question more than once.

Read my sig. Moved to correct section.

 

none. its stock

 

Why would your first mod be an exhaust cutout! thats retarded

 

exhaust cutout on a stock 2.0 will lose horsepower

 

what would you suggest for a first mod then

 

Start by a CAI/ABM,then cooling mods, then exhaust and then a "Stage". Mounts and whatnot would also be good to throw in there somewhere

 

I was also planning on doing a header downpipe then a cutout, And leaving everything from the cat back stock. But was worried about not having enough back pressure, And was going to start a thread like this asking about it.


At what point would it be beneficial running a cutout?
What if i put the cut out after a highflow cat?

The reason i want to run the cutout is, like the stock exhaust just cruising but want to be able to make some noise at times

 

Most header/downpipes sound pretty raspy on the factory catback.

 

Damnit.. What exhaust would you recommend for quiet power?

 

I have a Vibrant header/downpipe and a custom Magnaflow catback full 2.5. I used two mufflers instead of one muffler and a resonator. Driving around it sounds pretty stock (atleast on the inside).When I get on it, it sounds good and not ridiculus. Here is the old thread. Note it was before the header/downpipe. Is about the same noise wise but it "smoothed" it out a bit so it's not so poppy.
https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/custom-exhaust-info-pics-vids-126913/

 

I pmd you to stop the thread jack lol

 

corsa touring

 

Hey question and sorta a thread jack... haha im running a zzp header and DP combe 2.5 and 2.5 exit on to stock catback with magnaflow muffler..... Sounds a little raspy woundering if I should look into a 2.5 cat-back? sound any better?

 

1. Do a search on backpressure, youll find a bunch of crap telling you how stupid you would have made yourself look if you posted a thread on backpressure. You really shouldnt be even thinking of an exhaust cutout at the moment, at all. Really, it would be a waste of money at this point in time. Wait till you have a little power. And more than just an intake and exhaust.

2. krazy, do you have a cat? If not, get one that will take away rasp. Cheaper alternative is a resonator. Cost is like 65 at a muffler shop (that price included to have it welded on for me)

 

sigh... you don't want backpressure. i don't know why so many people think they want backpressure.

 

Is this directed towards me?

Im a turbo guy, And with them backpressure is never even a thought. But with N/A and supercharged motors everybody always say you will loss power with a cutout,

I have done some research on backpressure but its been awhile, IIRC, Its not realy backpressure that is good, its the "scavenging" or what ever its called that you want which goes along with backpressure.

And my car just has an intake so its not 400hp flowing a **** ton of exhaust lol

 

yes, yes it was.

Notice how i said, you would have make yourself look stupid (i meant by posting another backpressure thread)

i did not say that you WERE stupid...

 

Well when it comes to this car i am stupid at times so its good...


Like i said all my know how and experience comes from turbo cars, So this is a whole new concept to me.

The only reason i wanted a cutout is so i could keep stock catback so its still quiet

 

scavenging and backpressure are 2 different things. backpressure is air going the wrong way through your exhaust. scavenging happens when a vacuum is created in the exhaust which helps pull the air out, letting the engine work more efficiently. scavenging is not something you want TOO much of though.

but backpressure is not good, regardless of na, turbo, or super.

the biggest thing you want is exhaust VELOCITY. you want to get the exhaust out as quickly as possible to make room for the new exhaust. go too big, and the exhaust pulses will run into each other, which in turn makes the engine work harder to push them out. go too small and again the engine has to work harder to force the air out. this is why exhaust size is an important thought. most people just slap on an exhaust and call it a day, because they want a loud car. aka ricers.

 

Thats exactly what i dont want, Im trying to keep it as quiet as possible.

 

http://www.youtube.com/watch?v=pV1mxz3Svjo

then your like me.

i dont know of many other's short of people buying hahn systems that sound as good as mine.

gmpp exhaust with 2 reversed glasspacks.

 

Does sound good....

 

actually listen to the hahn flyby after it goes past the camera man it sounds kinda like a honda. Not comparing it to hahn 3 inch, but my standards for exhaust is very high.