Do LT headers amplify valve-train noise?
Thread Starter
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
Do LT headers amplify valve-train noise?
I just picked up my car w/ the re-ring and Kooks 1 3/4ths w/ cats installed. It sounds great, but I notice alot more valve-train noise. Is that a normal thing for LT headers? When I roll into the throttle it's there. Car runs fine and I guess it'd make sense for those big pipes and collectors to make it louder. Could I have an exhaust leak?
Race Director
Joined: Jan 2001
Posts: 11,183
Likes: 85
From: Castle Rock CO
St. Jude Donor '15
Re: Do LT headers amplify valve-train noise? (Cobra4B)
After I put coated mid-length headers on my LS1 T/A, I had a much more pronounced valvetrain noise. I usually did not hear under acceleration from in the car, but it was definately audible with the hood up or idling in a confined area. This noise also got a bit louder when I did the H/C package on it. I think this was due to the higher rate valve springs.
Todd
Todd
Intermediate
Joined: Dec 2003
Posts: 31
Likes: 0
From: Houston Texas
Re: Do LT headers amplify valve-train noise? (BLK 98WS6)
If what you are hearing is getting faster with the RPM of the engine, its the sound of the exhaust pulses hitting the collectors. It can also be the valvetrain too, becasue with the factory manifolds being thicker they obsorb some of the noise that GM didnt want you to hear from the engine. With the headers being not as dense and the cast iorn factory manifold, they transfer more noise.
HTH
HTH
Drifting
Joined: Nov 2002
Posts: 1,776
Likes: 5
From: Midlothian Texas
St. Jude Donor '12-'13-'14-'15-'16
Re: Do LT headers amplify valve-train noise? (Cobra4B)
If anything the headers should help cover the valve train noise.
If it is ticking your headers are leaking. :D
If it is ticking your headers are leaking. :D
Le Mans Master
Joined: Jan 2003
Posts: 6,298
Likes: 0
From: Tyler TX
Re: Do LT headers amplify valve-train noise? (Stang Killer)
If what you are hearing is getting faster with the RPM of the engine, its the sound of the exhaust pulses hitting the collectors. It can also be the valvetrain too, becasue with the factory manifolds being thicker they obsorb some of the noise that GM didnt want you to hear from the engine. With the headers being not as dense and the cast iorn factory manifold, they transfer more noise.
HTH
HTH
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Instructor
Joined: Jun 2002
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From: Pottstown PA
Re: Do LT headers amplify valve-train noise? (Dugmole)
If anything the headers should help cover the valve train noise.
If it is ticking your headers are leaking. :D
If it is ticking your headers are leaking. :D
Easy to tell with a mechanics stethascope.
Now with the C5 and Kooks, what I am hearing is the exhaust pulse more clearly.
Mike
Mike
