i gree with all but the bolded above. but then again I have had nothing but problem swith it.

 

Thanx for the info and yes you do have to watch out for water when you have a deleted air box. I am going to go on ebay and see if I can get one of those filter covers to stop moisture from entering.

 

So just because some of us prefer to buy tested and designed parts to install on our car we know nothing or are unable to do it ourselves. First off an exhaust system is not the easiest to make without a bender, even then you have to have a lift to be able to get under that car. With out that and a nice size shop it’s not worth the aggravation of building it. You could take it to a local muffler shop but then it could take several tries to get the sound you want. And even then you might not have a good build quality. With a system build by a company you know you have a decent product that is backed by warranty.

Now the intake; the stock intake is built very well for the least amount of Hp loss and the air box mod is a good way a squeeze out a few more Hp. I didn't really feel comfortable sticking a new filter in there and hoping it would stay. The stock air box was designed for the bottom to be put on and to hold the filter in there. I purchased a New CAI because its designed to hold a high flow filter. Doing something half assed is no way to do a job. I had the air box mod done for one month and was getting a CEL. After I got my CAI it went away and I haven’t had one since, now have had 5,000 miles since install. The added whine is nice but it is only a plus to the added performance. Some people like the whine and only do these things to get it.

I have a lot of tools and for the most part am able to build most anything. For the last three years I have worked on my '57 truck. We have built everything for it except for body panels, exhaust and the new interior leather. New mounts for the tranny, radiator, everything was done from scratch. Now with this car it’s nice not to have to do that and there is virtually no down time when adding a new upgrade. I installed all my parts myself with the help of my brother or father when needed.

I know you weren't talking to anyone in specific but i just wanted to add my two cents.

 

GMPP Manifold ??? Do you mean The GM exhaust manifold if so where can I get this ? I would love to replace the manifold on my cobalt.

 

go to www.gmpartsdirect.com in the upper left corner type in Part Number 19131972. It is $281.40 without shipping.


Also... Shops that have a Mandrel Bender are few and far between. They are very expensive. I agree with doing work yourself but who has a pipe bender at their house. I know i don't. Most of us would have to take it to an exhaust shop. As far as the AirBox mod, you may be able to hear the whine and quicker acceleration but something that is designed and tested have results to prove it makes more hp sounds better to me. Don't get me wrong, i understand not everyone make's a lot of money and are trying to be creative but with a CAI from K&N or Injen the air may flow better with a metal pipe than the factory plastic piping and also being a bigger diameter with a high flow air filter will allow more air into the engine.

 

And you don't really need to make alot of money to afford thing, just make sure to spend wisely on things you want and save up. I sure as hell am not rich, i work my ass of pay my bills, pay for school, i'm lucking to not have to pay rent but all it takes it hard work and you can get things you want/need

 

I totally agree. You have to make sacrifices. If you want something, you have to give up something else

 

Yes you make a very good argument and I agree these are my plans please tell me what you think:

Get the following items:

1) GMPP Manifold
2) Injen Intake


Get the following exhaust mods:


Leave Catallyc converter intacted replace muffler with a magnaflow muffer, also replace last 1/3 of exhaust pipping with 2.5' exhaust at local exhaust shop.


What kind of hp gains should I expect? Will i run any risk of damaging my car with these mods " the cel codes with intakes that supposibly make your car run dangerously lean scare me".

Also what kind of sound do you guys think I should expect would it sound like that video posted of that "no offense" horribly sounding corsa exhaust ?

 

What problems are you having with the GM Extrude Honed Manifold?

 

you wont have a CEL with that exhaust set up but you have about a 50/50 chance with the intake.

 

As long as you get the right muffler for the job it won'ts sound bad. Did you like the other video of the corsa exhaust, the one i made?

 

I currently am running NO muffler and sounds good but at times is just a little too loud. the shop that did my work has some stock srt-4 exhaust laying around and since they just use resonators and no mufflers and sound awsome (personal prefrence) im thinking of just using the resonators off them? any sugg??

 

Get a muffler on that thing, its gotta be annoying as hell. Even if its a cheap one put something on it. and get a video of it

 

I agree with the sound of the exhaust. My friend has a SRT-4 w/ Stage 2 and it sounds awesome. Best sounding stock exhaust on a 4cyl IMO

 

I know it wont be just like the srt but it almost sounds like them now without the whistle noice and mines just a TAD LOUDER, so yea i need something to quit it down

 

Originally posted by ChevyPowered

Now the intake; the stock intake is built very well for the least amount of Hp loss and the air box mod is a good way a squeeze out a few more Hp. I didn't really feel comfortable sticking a new filter in there and hoping it would stay. The stock air box was designed for the bottom to be put on and to hold the filter in there. I purchased a New CAI because its designed to hold a high flow filter. Doing something half assed is no way to do a job. I had the air box mod done for one month and was getting a CEL. After I got my CAI it went away and I haven’t had one since, now have had 5,000 miles since install. The added whine is nice but it is only a plus to the added performance. Some people like the whine and only do these things to get it.



Well chevypowered apparently you didn't read my post. First off I didn't do anything half assed. Secondly I described how I fixed the bottom of the filter so it would never come out. I guess you don't listen. I know it is hard to hear that you wasted your money but it is plain simple fact. If you look at how I did my air box mod you will find it is quite different than anyone elses. You will also find that I used gutter strap to support the bottom and screwed everything back into their stock location without the bottom of the air box. Perhaps you should pay more attention to a post before you go disagreeing with it. I would invite you to come and hang like a monkey from my intake while it is on lifts. I gurantee before that filter falls off you will fall of from being tired of hanging there. I am not trying to flame here so don't get the wrong idea. Fact is that there are many many many parts that you can fab and will look perform and operate the same as parts that you can buy. Anyone that has ever worked on anything in their lives know this.


What I want to do is show people you don't have to spend that money to get the results they want. With a little hard work and brain power you can pretty much do anything to your car. Maybe a CAI from a vendor is 2% louder but I can't tell. I had one in a box and after hearing my setup vs 2 other setups I sent it back and got my money back. Now would I have done that if it didn't sound almost exactly and perform almost exactly if not exactly in the same manner ? NO. Getting air into and out of a vehicle really isn't rocket science.

 

Again I read in a couple more posts following that something like you may get more air flow with a high flow filter. PLEASE READ MY POSTS.


I have a high flow filter. Check my sig it is a k and n. The tubing isn't doing as much as you beleive it is. Jeez I will never try to help anyone out on this forum again !

 

I did read your post on how you installed your filter and with out pictures of the actual work all i can see is some jerry rigged box. I used a hose clamp for mine to hold the filter on and it wouuldn't move but it still made me nervous. I never said your work was half assed jut that the general airbox mod was and how most poeple would do something to make it work. All i am saying is that yes all the parts can be made but in general there will more time spend on a home made system than a designed one. I have to work on my truck alot to fix little things here and there, nothing on that is halfed assed or not done properly, we built everything from autocad drawings that we made, its just when you have something that has not been tested you have problems, and i would rather not even have to think about that in my daily driver. I see my money as well spent.

 

It is money well spent but wouldn't you agree if you had the time it would be money well saved ? All that is going on under my filter if you can picture it. The filter is there then there is two pieces of gutter strap across the bottom like this X then the four corner are screwed into the four exisiting area where the factory bottom was mounted. Hell if you wanted to feel really safe about it go get some chicken wire like people use for grills and use that to mount the filter. It is completely pourous so all the air will get through and very strong for that application.

I am not saying spending your money on that stuff is wrong. Hell if you got it and you want to spend it go for it. It looks great and performs well..... Im just saying if you want to save $$$ or you are just a cheap ass there are other ways.

I actually think we are agreeing with one another just in a very circular way.

 

No i knew you had a high flow filter i saw that, none of my posts question it. Neither did i comment about the tubing. We are just debating, and its kinda stupid becuase its all personal prefrence. I f you got the money and don't mind spending a little extra get the parts form the companies, if not you have a good way of getting some more horses with a slight sacrifce or durability depending on how its done. You should get a dyno done on your car so we can see what the increases look like. Have a nice day. And we are agreeing but it is in a "circular way" I didn't mean to sound rude or anything i just like to put my two cents in.

 

Good debate. How is your engine running with a 2.7 and no injector or plug swaps ?

 

I live at 7000 Feet so i get about 12.2 psi with the 2.7. I recently took it off and put my 2.9 on and am enjoying the better MPG. I got plugs on the way and will get stage two kit when it comes out.

 

Wow that freaking sucks 12.2 with a 2.7 ???? Elevation is a biiiiooootch. I was at 12.5 stock. With my 3.15 I am hitting 14.5 with the BPV mod. What plugs did you get ? Yesterday I ordered the range colder plugs by NGK from SFPH. When the stg2 comes out I am going to go with a billetflow 2.9 inch pulley. Billetflow is about 2 miles from my house so..... works for me. Remember that the spin rate on the m62 is 14000 rpm. I dunno if a 2.7 would be good for normal elevation drivers. I think that puts you at 20 psi.

 

I also got the NGK plugs. I've been watching what JMC has ben doing, he has the 2.6 with no problems, i usually only run the 2.7 if i'm going to a car meet or something like that. I'm confident with the blower being able to handle those speeds but to be safe i try to use the larger one when i don't need all the power. I plan on getting the 3.1 as well then it should further help my MPG and i'll have something if i go back to sea level.

 

Yeah JMC seems to know what he is doing. I don't know about a 2.6 at sea level but if it works great. I know at that rate you need to machine the snout. That is just something I am not willing to do. The 3.15 works great and gas mpg is not that affected.