That right there is a good tip.
full exhaust on..now WTF?!
Thread Starter
Instructor
Joined: May 2006
Posts: 233
Likes: 0
From: Jacksonville FL
full exhaust on..now WTF?!
I got the lg pro long tube headers with off road pipes leading to a corsa indy car cat back...Now my car sounds like ****.. I LOVE loud exhausts...Now my car actually pops and backfires maybe? I know about the motorboat sound when ya let off the gas but it pops with a loud bang when dethrottling....Also the car sounds real good under part throttle, but hen i press the go pedal, it sounds like open headers, not crisp at all..Is this normal? I changed to colder plugs b/c Im ordering a blower soon, did this cause the problem?
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
I had the Indy's on my car with LT's but with Hi-flow cats. I didn't get a lot of popping and the car screamed at you WOT. It actually sounded like an Indy car and like is was revving about 8k. It was a little too loud and I was short shifting all the time to keep it quiet. Tried the Zo6 Ti's for a while but I missed my loud pedal. Now I'm running GHL's w/ 6in cans and it's perfect.
Race Director
Joined: Mar 2005
Posts: 10,091
Likes: 17
Originally Posted by WKMCD
I had the Indy's on my car with LT's but with Hi-flow cats. I didn't get a lot of popping and the car screamed at you WOT. It actually sounded like an Indy car and like is was revving about 8k. It was a little too loud and I was short shifting all the time to keep it quiet. Tried the Zo6 Ti's for a while but I missed my loud pedal. Now I'm running GHL's w/ 6in cans and it's perfect.
Instructor
Joined: Jun 2006
Posts: 222
Likes: 1
From: Rapid City SD
Sounds like classic exhaust leak. Start checking your connections. It's probably not really a backfire(caused by timing problem) it's air gettng sucked into a leak and igniting in the pipe. Very common. I used to used a lit cigarette and hold it by the exhaust connection points while someone held the accelerator at an elevated rpm. The smoke will be drawn into a leak.
Le Mans Master
Joined: Oct 2005
Posts: 5,446
Likes: 0
From: Kailua HI
Originally Posted by BloodRayne
I got the lg pro long tube headers with off road pipes leading to a corsa indy car cat back...Now my car sounds like ****.. I LOVE loud exhausts...Now my car actually pops and backfires maybe? I know about the motorboat sound when ya let off the gas but it pops with a loud bang when dethrottling....Also the car sounds real good under part throttle, but hen i press the go pedal, it sounds like open headers, not crisp at all..Is this normal? I changed to colder plugs b/c Im ordering a blower soon, did this cause the problem?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Melting Slicks
Joined: Aug 2005
Posts: 3,398
Likes: 2
Originally Posted by BarneyZ
FWW I've read some posts, and had one very experienced installer tell me that the slip-fit connections used by LG make that system prone to exhaust leaks.
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
Originally Posted by briann510
slip fit? do it right and weld them
This was my biggest reason staying w/ the Kooks they use a flange type design and it doesn't leak.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
My LGs don't leak at all, and the popping with an O/R X pipe is normal. However, if it's loud like a backfire, you've got a leak, or reversed O2s. The latter should make the car run rough, as well. The bandclamps that come with the headers are very easy to work with, and leak-free for over 3 years. I did change out from Borla Stingers, to a Magnaflow catback, because of excessive noise.
Burning Brakes
Joined: Mar 2006
Posts: 1,195
Likes: 25
From: Tacoma WA
When I added B&B Bullets, there was a lot of pop and gurgle on Decel (factory H pipe) and when i added the Dynatech SupermaXX Headers (pictured above) i was afraid i'd get TONS more - but the x-pipe does a really good job of equalizing the pressure and really reduces the pop... now it only happens a little, and usually when it's cold.
I will add however, a good tune can clear up some of your problem. I read that certain tables can have a large effect on your car during decel.
GL
Dan
I will add however, a good tune can clear up some of your problem. I read that certain tables can have a large effect on your car during decel.
GL
Dan
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Originally Posted by BloodRayne
I got the lg pro long tube headers with off road pipes leading to a corsa indy car cat back...Now my car sounds like ****.. I LOVE loud exhausts...Now my car actually pops and backfires maybe? I know about the motorboat sound when ya let off the gas but it pops with a loud bang when dethrottling....Also the car sounds real good under part throttle, but hen i press the go pedal, it sounds like open headers, not crisp at all..Is this normal? I changed to colder plugs b/c Im ordering a blower soon, did this cause the problem?
I hve TPIS Headers with a Slip Fit, Gutted Cats and an X pipe with Corsa Indys..
Yes it's loud and as someone said before.. The Xpipe makes it sound like a indy car reving to 8000 rpms..
I do get burble on decel.. Also if I did into the pedal hard and then lift.... I bbbbbdddddddddddddddddddddd BANG!!!
Scares the **** out of the drivers behind me..I am sure it's a leak at the slip fit.. Caus I can see soot there.. I could care less..
Thread Starter
Instructor
Joined: May 2006
Posts: 233
Likes: 0
From: Jacksonville FL
Originally Posted by chuckster
I hve TPIS Headers with a Slip Fit, Gutted Cats and an X pipe with Corsa Indys..
Yes it's loud and as someone said before.. The Xpipe makes it sound like a indy car reving to 8000 rpms..
I do get burble on decel.. Also if I did into the pedal hard and then lift.... I bbbbbdddddddddddddddddddddd BANG!!! Scares the **** out of the drivers behind me..
I am sure it's a leak at the slip fit.. Caus I can see soot there.. I could care less..
Yes it's loud and as someone said before.. The Xpipe makes it sound like a indy car reving to 8000 rpms..
I do get burble on decel.. Also if I did into the pedal hard and then lift.... I bbbbbdddddddddddddddddddddd BANG!!!
Scares the **** out of the drivers behind me..I am sure it's a leak at the slip fit.. Caus I can see soot there.. I could care less..
BANG!
Burning Brakes
Joined: Sep 2005
Posts: 987
Likes: 1
From: Braidwood Il.
Exhaust leak
A good way to find where you have a leak in your exhaust is, get the car up on a rack at a repair shop, start the engine and get an old blanket or a big cover, bunch it up and hold it over the ends of the exhaust pipes, it will hiss very loud wherever there is a leak in the system.