Not too crazy about BB bullets
Burning Brakes
Joined: Jul 2007
Posts: 881
Likes: 2
From: hill billy hell
not to steal thread but
nothing to do with exhaust sound, Exhaust sound is mainly determined through
compression and cam specs. Also they did not do it for higher compression.
The LT1/4 had higher compression (10.4:1/10.8:1)
than the LS1 (10.2:1)and the LT1 engine (Gen II)had 18436572 firing order.
This was quote from tech article
"The other big ignition story with Gen III is a different firing order. Gone is the time-honored 1-8-4-3-6-5-7-2 sequence. This new engine fires 1-8-7-2-6-5-4-3. The cylinders are numbered the same: left bank: 1-3-5-7 and right bank: 2-4-6-8. The reason for the new firing order is better idle stability and less vibration."
Here is link if anyone cares
http://www.corvetteactioncenter.com/...27s+LS1+Engine
No intent to make anyone angry
Instructor
Joined: Oct 2005
Posts: 122
Likes: 0
From: Tri-Valley(East Bay) CA
Mine really woke up after about a month of having them on. I'll admit that I was a bit disappointed when I first installed them in the beginning, but now they seem alot louder. Plus, I just received my Long Tubes and X Pipe so it should really wake things up!
Safety Car
Joined: Jul 2006
Posts: 4,325
Likes: 0
From: You can't get there from here NJ
St. Jude Donor '08-'09
For me, the modular motors from Ford sound the best. As for my Vett exhaust, I am done spending $. This is the 3rd system I've had on my Vett. My Corsa Indy's actually sounded nice, but since I don't drive my Vett every day anymore, I wanted to get loud and had hoped that this system would do the trick. I will need to see if I start to like the sound, if not, oh well........I'll deal with it as is 
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
Just was bugged over this statement. The firing order change has
nothing to do with exhaust sound, Exhaust sound is mainly determined through
compression and cam specs. Also they did not do it for higher compression.
The LT1/4 had higher compression (10.4:1/10.8:1)
than the LS1 (10.2:1)and the LT1 engine (Gen II)had 18436572 firing order.
This was quote from tech article
"The other big ignition story with Gen III is a different firing order. Gone is the time-honored 1-8-4-3-6-5-7-2 sequence. This new engine fires 1-8-7-2-6-5-4-3. The cylinders are numbered the same: left bank: 1-3-5-7 and right bank: 2-4-6-8. The reason for the new firing order is better idle stability and less vibration."
Here is link if anyone cares
http://www.corvetteactioncenter.com/...27s+LS1+Engine
No intent to make anyone angry
nothing to do with exhaust sound, Exhaust sound is mainly determined through
compression and cam specs. Also they did not do it for higher compression.
The LT1/4 had higher compression (10.4:1/10.8:1)
than the LS1 (10.2:1)and the LT1 engine (Gen II)had 18436572 firing order.
This was quote from tech article
"The other big ignition story with Gen III is a different firing order. Gone is the time-honored 1-8-4-3-6-5-7-2 sequence. This new engine fires 1-8-7-2-6-5-4-3. The cylinders are numbered the same: left bank: 1-3-5-7 and right bank: 2-4-6-8. The reason for the new firing order is better idle stability and less vibration."
Here is link if anyone cares
http://www.corvetteactioncenter.com/...27s+LS1+Engine
No intent to make anyone angry
Racer
Joined: Apr 2004
Posts: 391
Likes: 7
From: Garland Texas
Your right knowledgefreak but i try to stay out of the pissing matches that get started here some times. That is why i said it sounded like a Ferrari lol. The cams have to be changed to handle the firing order and that effect the sound. A cam for a ls1 is not the same as a cam for a
lt4 and so on, and a vett will not sound like a ford or will a dodge sound like either lol. 
lt4 and so on, and a vett will not sound like a ford or will a dodge sound like either lol.
Burning Brakes
Joined: Jul 2007
Posts: 881
Likes: 2
From: hill billy hell
Your right knowledgefreak but i try to stay out of the pissing matches that get started here some times. That is why i said it sounded like a Ferrari lol. The cams have to be changed to handle the firing order and that effect the sound. A cam for a ls1 is not the same as a cam for a
lt4 and so on, and a vett will not sound like a ford or will a dodge sound like either lol.
lt4 and so on, and a vett will not sound like a ford or will a dodge sound like either lol.
Hey I am with you all. Do not get me wrong. I just do not see what
firing order had to do with running more compression. Call me a noob.
Because I am old school 18436572
Race Director
Joined: May 2007
Posts: 10,805
Likes: 706
From: Feverish All Over
Sound
I've seen guys in other threads note that the Chevy firing order is different from Ford, hence the different sound on Stangs. It's kind of like DNA that an exhaust system mod will not be able to change completely...
Do a search on "firing order" to learn more....
Do a search on "firing order" to learn more....
