Reducing engine noise in cabin

[ls1frc]

Hello, does anyone have any suggestion on how to reduce engine noise coming through the dash/floor area? After I swapped my lifters for Morels, which are definitely noisier than stock, my headers amplify the valvetrain pretty hard into the cabin. It's getting to the point where I want to put the manifolds back on, but I figured before I did that, I'd try to reduce the noise somehow. I know the dynamat stuff seems to help, I am just not sure where to put it.

Would a hoodliner help?

https://www.amazon.com/Dynamat-11905-Hoodliner-Self-Adhesive-Deadener/dp/B00069QLVC

 

[Doubeleive]

you could try maybe lining the firewall inside and out I think that's about as good as you can do

 

[iamdub]

There's a pretty decent mat under the carpet on the firewall, but virtually nothing on the floorboards/floorpan aside from the jute pad and carpet. Line the firewall with as much as you can but pay extra attention to the floors. Use the stick-on sheets directly on the metal then a MLV (mass loaded vinyl) on top of that, then cover it with the factory jute pad and carpet. Stage 2 would be doing the doors, on the backside of the outer skin and on the inside shell.

 

[gooffeyguy]

Have some LizardSkin sprayed on the floor board and lower firewall area

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[ls1frc]

Ok I will buy some dynamat and give it a shot.

I guess I pull the two front seats, pull some trim, and peel the carpet back? Any pictures/guides on how to do this?

 

[GreyStone]

GL.

 

[ls1frc]

Here is the noise. It's the constant chirping/air noise.

 

[mikeyss]

Seriously.....I can't hear anything that should be complained about.

 

[GreyStone]

Here is the noise. It's the constant chirping/air noise.

is your engine cover on?

 

[ls1frc]

is your engine cover on?

Yes, engine cover is on.

 

[BG1988]

Hello, does anyone have any suggestion on how to reduce engine noise coming through the dash/floor area? After I swapped my lifters for Morels, which are definitely noisier than stock, my headers amplify the valvetrain pretty hard into the cabin. It's getting to the point where I want to put the manifolds back on, but I figured before I did that, I'd try to reduce the noise somehow. I know the dynamat stuff seems to help, I am just not sure where to put it.

Would a hoodliner help?

turn up the radio


Hybrid exhaust upgrade it's quiet sometime I have to check if the engine is still running

 

[ls1frc]

turn up the radio


Hybrid exhaust upgrade it's quiet sometime I have to check if the engine is still running

Honestly, that's what I do lol. When DVD is playing for my kid or a/c is on don't really notice it. Windows down, don't notice either.

 

[DRKN57]

Honestly, that's what I do lol. When DVD is playing for my kid or a/c is on don't really notice it. Windows down, don't notice either.

Sometimes the simple solutions are the best solutions. The A/C fan is so loud it drowns out most noise for me.


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[ls1frc]

Yeah I got used to it, doesn't really bother me anymore. It's worth it now that i know I dropped the 0-60 by a full second.

 

[DRKN57]

Yeah I got used to it, doesn't really bother me anymore. It's worth it now that i know I dropped the 0-60 by a full second.

Yup, that’ll do it.


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[BG1988]

Yeah I got used to it, doesn't really bother me anymore. It's worth it now that i know I dropped the 0-60 by a full second.

there is some oem engine bay sound dampening not sure of the part# though

go to a junk yard and swipe it off a hybrid from the firewall and hood it will quiet it by about 20-30%