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I need some suggestions about my exhaust problem. Yesterday I installed Pacesetter Long tubes and ORY.(I have a Corsa Sport Exhaust) Only to find that it is raspy around 3,000 Rpm and again at 5000 Rpm, below this it sounds fine at part throttle but wide open it shrieks:( . I'am kind of on the fence of putting the stock manifolds and y pipe back on , I really enjoyed the exhaust note prior to the long tubes. Let me know what you guys think.
Mine was raspy at 3K and up w/LT's and Y. Swapped mufflers and it was a deep and less raspy up high. Think thats why all these guys run Magnaflows
i bet if you put some cats in the off road-y it would take away alot of the raspiness...
try a glasspack/race muffler. Right now i'm running cats and straight 3" pipe on stock manifolds...i get the rasp right around 18-2500, before or after, just sounds mean.
Yea originally I had cats for the setup but after I got the setup bolted up the cats were too long with the ball and socket style collectors I had installed on the long tubes.So I had to ditch the cats in order to get y-pipe to fit.Quote:
Originally Posted by mitch cobb racing
ya, it would suck to have to mess with the ORY or get a new one with cats or something, but i know that when i took my cats out it got alot louder and redneck/raspier....
Mitch do you like the Dynatech's on your truck. How is the over all fitment and sound?
:thumb: x 3048713 for the dynatechs if you have the money. they arent cheap, but the fit great with no rubs or anything, no rust or anything after about 30,000 miles and the overall quality is great. i guess they sound good, ive never heard another 6.2 with another type of headers...
Quote:
Originally Posted by mitch cobb racing
Do you have a sound clip or video , so I can hear what it sounds like?
YouTube - exhaust clip v. 3
but keep in mind, this is a 6.2 with L92 heads and two 14" resonators as mufflers.... true dual 2.5" ,erged into a single 3.5" after the mufflers...
you may wanna try a big case magnaflow, something in the area of 18-24". I hear that will cut down on the raspyness and just make it deep and ballsy
If you feel like selling that Corsa, lemme know.
mitch i love the tone. but no cats? unfortunatly im in a county that requires them. A cam and that tone will sound mean. Hope to get something similar soon!
you needa go north then!!! good ole' Dawsonville!! my exhaust guy was happy when he didnt have to deal with putting cats in...
Lets just put my tag in your name and ill just run around metro ATL with open headers LOL
with your simple mods how much did you notice with the nelson tune?
:lol: i doubt you want to put a car in my name, insurance would probably go up!!! haha
with your simple mods how much did you notice with the nelson tune?
hey buddy ,i had the same thing happen ,i added dynomax bullets on the end as resonators and it solved the raspiness.good luck.
the way i did my mods and tune, not much. but thats just because with the NNBS trucks you cant tune the engine and trans thru a mail order tune, so when i just got the motor tune, it wasnt a huge difference. then i did the intake and exhaust, then the trans tune and then nitrous... but when i got the trans messed with it was a pretty big difference!
Quote:
Originally Posted by pl4yboy
I love the Corsa:)but the long tubes might be coming back off.
Thanks for the info.Quote:
Originally Posted by Ramsey
How you guys pass inspection without cats?
Drive up here and I'll show you. :naughty: Bring cash :LOL:
:LOL:Quote:
Originally Posted by GasGuzzler
Too bad it's a NBS or I'd buy the headers too lol.
Lower your truck, a lotQuote:
Originally Posted by Nick107
I had the same problem with the raspy exhaust, I cured it by installing a 14'' glasspack muffler at the end of the tailpipe right before the exit. I also have a single 18'' magnaflow... It still has great tone but without the crackle at different rpms...
YES!! Well, they haven't caught on that i don't have them, but it still fails the actual emissions part lol. The two speed test gets me for high HC levels at idle, so it looks like i HAVE to add cats. Looking at Magnaflow metallic spun hi-flows.:(Quote:
Originally Posted by vista4.8
I am also hoping adding the cats will cut out some of the raspiness my exhaust seems to have (stock manifolds, true dual to 40 Flowmasters).
I know someone that put a stock muffler from something else back on then put a Magnaflow right at the rear.
The guy can fess up if he wants to. He has F-car headers too.....
What is the smallest cat you guys have seen, when I say smallest I mean overall length?