12-16-2008, 12:22 AM
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#21
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Let's Play Army!
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exhaust system is Header->downpipe->Cat->pipe->muffler (if you take out the resonator, like I did)
catback is a word used to describe the setup, it's not a part.
my piping is stock, and IIRC it's 2 1/8" ID. 3" would be too much for a NA setup on the 2.4. would be perfect on boosted though.
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Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-16-2008, 12:23 AM
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#22
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Let's Play Army!
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Quote:
Originally Posted by whiterider00
think i would have enough room with it only lifted up in the front? only have one pair of stands.
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if the only thing you're doing is the header, you should be good doing just the front. Get it as high as you can without putting the stands on the suspension though. firm on the "frame"
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Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-16-2008, 12:27 AM
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#23
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V.I.P. Member
Join Date: Nov 2003
Location: lookin' at you in the rearview
Posts: 779
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The exhaust system is typically the manifold/header, down pipe, flex pipe, cat, resonator, muffler, and the piping connecting them all. I have a header into 2.5" mandrel bent and I wouldn't go any bigger for NA.
Also, when you connect the header back to the head there is a specific torque sequence that you are suppose to follow. Starting in the center and working out at a certain value then do it again to a higher setting. This prevents warping of the head. The connection really does not need to be uber tight either, that is what the gasket is for.
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I'm on a boat.....
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12-16-2008, 12:35 AM
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#24
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Let's Play Army!
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^ Thanks! I didn't know that, but I figured it was common sense. lol I treated it like the lugnuts, "trying" to do the star pattern.
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Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-16-2008, 12:49 AM
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#25
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GL Member
Join Date: Dec 2007
Location: Honolulu, HAWAII!
Posts: 683
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i have the ecotec. seems most recommend about a 2.5" piping. already got a header and a muffler. does getting a highflow cat really help?
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sigs are annoying
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12-16-2008, 10:11 AM
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#26
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Let's Play Army!
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if you already have the muffler and header installed, don't bother. if you don't have them installed already, sure go for it. the stock Cat flows fairly nicely, if it's in good condition.
Just by luck, I purchased a high-flow cat online. days later (before the high flow arrived) the stock one clogged and burnt up...so I needed to replace it anyway.
__________________
Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-16-2008, 09:14 PM
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#27
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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ive been thinking about replacing the cat while i was under there, seeing as the original one has 165+k on it, but there doesnt seem to be any issues with it, and im quite tight on money, so ill probly leave whats there, especially since i may not be able to weld it all up. really looking forward to getting the header on tho...
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12-16-2008, 10:08 PM
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#28
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Let's Play Army!
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Location: Lockport, NY
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when there are no problems, I've heard that factory cats can last up to around 400k. I wouldn't replace it unless there's a problem. If you do, keep the old one...maybe you can sell it. hehe
__________________
Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-17-2008, 10:06 PM
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#29
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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it would end up taking more time and money than i really want to spend to replace the cat too, so its just the header for now.
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12-20-2008, 08:21 PM
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#30
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GL Member
Join Date: Oct 2006
Location: Oshawa
Posts: 323
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Quote:
Originally Posted by AlbinoMonkeyRat
if you already have the muffler and header installed, don't bother. if you don't have them installed already, sure go for it. the stock Cat flows fairly nicely, if it's in good condition.
Just by luck, I purchased a high-flow cat online. days later (before the high flow arrived) the stock one clogged and burnt up...so I needed to replace it anyway.
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curious to know what the symptoms are that would indicate a bad converter? It's not an issue that I have ever encountered. Just curious...
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12-20-2008, 08:27 PM
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#31
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Let's Play Army!
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Location: Lockport, NY
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well, depends on how bad it is. if its absolutely clogged, exhaust pressure could build up and eventually cause misfiring. if its just not converting well, the sensor will pick it up and shoot you a dummy light.
__________________
Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-20-2008, 08:51 PM
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#32
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GL Member
Join Date: Oct 2006
Location: Oshawa
Posts: 323
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cool. Thanks for the info!
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12-20-2008, 09:24 PM
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#33
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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suprised i havent had any issues with mine. cars been lowered for about 8 months, and the cat seems to be the lowest part of the exhaust, thus hitting on speedbumps, and steep inclines, but havent got any codes or change in performance.
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12-24-2008, 05:16 PM
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#34
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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no sense starting another thread with the same topic, so ill ask here: did anybody who installed the header wrap it first? i ask because my brother just wrapped the headers for his 87 grand prix, and has some left over. just wondering what peoples thoughts were. he told me it voided any warranty on the headers tho, but what can really go wrong besides some rust?
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12-24-2008, 10:31 PM
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#35
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GLS member
Join Date: Aug 2006
Location: Grand Forks, ND for school; Langdon, ND home
Posts: 2,632
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wrap stops more heat from emitting off the header and supposedly forces the heat to move father down the exhaust b4 it escapes. and commercials say that happening would give you more power, but i highly doubt it.
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2001½ F150 XLT Crew Cab- true dual glasspacks with x-pipe, AEM intake, SCT X3 with VMP custom tunes, full stereo system, HID 55w heads and 35w fogs, 35% tint front and 20% rear, Lightning tail lights
04 F6 Sno Pro Team edition- MBRP race can, ODS clutch kit
01 YZ125- bored out to 144, PnP cylinder and head, Pro Circuit WORKS suspension, many other mods
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12-24-2008, 10:58 PM
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#36
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Let's Play Army!
Join Date: Nov 2003
Location: Lockport, NY
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as long as the air coming out of the engine isn't obstructed, it doesn't matter how hot it is. The stock heat shield is on there to protect the gas tank from the heat from the exhaust.
__________________
Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-25-2008, 12:22 PM
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#37
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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ill probly do it anyway since the stuff is so inexpensive. cant hurt right?
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12-26-2008, 12:40 AM
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#38
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Let's Play Army!
Join Date: Nov 2003
Location: Lockport, NY
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unnecessary added weight...plus if you get moisture in there, it makes the pipes more susceptible to rust. more cons than pros. better off just going without it.
__________________
Quote:
Originally Posted by black
holy crap, i just farted at work and the whole office stinks!!!!
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RIP to my Alero @ 112000 miles. COD: thrown rod. TOD: 430pm, Dec19, 2011.
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12-26-2008, 10:25 PM
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#39
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GLS member
Join Date: Mar 2008
Location: MA
Posts: 1,304
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i dont think its gonna make any difference with the weight of it, its just fiberglass cloth. and there is a silicone based spray that you put on after wrapping them to prevent moisture. but i know when my brother did it he was covered in fiberglass fibers, and he had a hell of a time doing it. havent decided yet tho. if i get the header before my next paycheck, im just gonna put it in w/o wrap. if i get more money before the header, i may wrap it before installing.
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12-27-2008, 01:06 AM
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#40
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GLS member
Join Date: Sep 2008
Location: The Dotte of Michigan
Posts: 1,145
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Quote:
Originally Posted by whiterider00
i dont think its gonna make any difference with the weight of it, its just fiberglass cloth. and there is a silicone based spray that you put on after wrapping them to prevent moisture. but i know when my brother did it he was covered in fiberglass fibers, and he had a hell of a time doing it. havent decided yet tho. if i get the header before my next paycheck, im just gonna put it in w/o wrap. if i get more money before the header, i may wrap it before installing.
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Wear rubber gloves
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1999, RED Alero GX
Mods: WAI/CAI Intake w/ K&N Filter, Dynomax Muffler, B&M Shift+ Drag DR-9 Wheels, Yokohama YK520 Tires
Soon to come: Full 2.5'' Exhaust, Re-Worked CAI Utilizing Factory Air Box, AAS Body Kit, KYB Struts, Sprint Springs
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