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Engine Noise in Cabin? by fffttt1
Started on: 05-29-2014 10:57 PM
Replies: 7 (177 views)
Last post by: Lou6t4gto on 05-31-2014 12:45 PM
fffttt1
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Report this Post05-29-2014 10:57 PM Click Here to See the Profile for fffttt1Click Here to Email fffttt1Send a Private Message to fffttt1Edit/Delete MessageReply w/QuoteDirect Link to This Post
I've heard that much of the engine noise in the cabin may come through the rear window. Has anybody ever tried installing basic hood scoops (like this, http://www.showcars-bodypar...X-hood-scoop-135.jpg ......only somewhat taller for more ventilation area). Maybe install some insulation under the rear deck lid and install the scoops facing rearward on each vent opening.
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bobace455
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Report this Post05-30-2014 12:57 AM Click Here to See the Profile for bobace455Send a Private Message to bobace455Edit/Delete MessageReply w/QuoteDirect Link to This Post
My 86 2.5 has a scoop similar to that mounted backwards on the rear deck. The PO cut a square opening on the deck and then put the scoop over it for ventilation. I think it is a neat look weather it helps with sound or not...
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PaulJK
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Report this Post05-30-2014 01:56 AM Click Here to See the Profile for PaulJKSend a Private Message to PaulJKEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fffttt1:

I've heard that much of the engine noise in the cabin may come through the rear window.



I don\t believe it. Much of my engine noise comes through the rearbulkhead and computer area. Also get road and engine noise through the "B-pillars" which are hollow and vent air from the passenger compartment to the outside. There are vents in the b-pillar that are at ear-level; they are behind the quarter windows.
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Csjag
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Report this Post05-30-2014 06:56 AM Click Here to See the Profile for CsjagClick Here to Email CsjagSend a Private Message to CsjagEdit/Delete MessageReply w/QuoteDirect Link to This Post
Its a moot point for me because I usually drive with the windows down but I bet some dynamat under the rear bulkhead carpet would help a lot.
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fierofool
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Report this Post05-30-2014 08:58 AM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageClick Here to Email fierofoolSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
This scoop is fully functional and has 8 openings to the engine bay. In addition to the side grills, it probably lends a lot to compartment cooling, but probably does nothing to reduce noise transmission. Take a look behind your ECM to see if your shift cable grommets have come out of the bulkhead. Lots of noise can come through those if they're out of place.
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84fiero123
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Report this Post05-30-2014 09:58 AM Click Here to See the Profile for 84fiero123Click Here to Email 84fiero123Send a Private Message to 84fiero123Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fffttt1:

I've heard that much of the engine noise in the cabin may come through the rear window. Has anybody ever tried installing basic hood scoops (like this, http://www.showcars-bodypar...X-hood-scoop-135.jpg ......only somewhat taller for more ventilation area). Maybe install some insulation under the rear deck lid and install the scoops facing rearward on each vent opening.


I'll tell you what I tell my Youngest daughter when I turn my tunes up, she likes country, I like old time Classic Rock and Roll,

"If it's to load, your to old!"

Simplest and best as well as most cost affective is earplugs.

I like the sound of the engine noise, tells me it's running right or not, many people don't, buy earplugs. Or do like my wife used to when she heard some new noise made by the cars/trucks we have owned over the last 30 years, Turn the Radio UP. She doesn't do that anymore since I explained the noises are telling you something, then tell me about them so I can fix whatever is making the new noise. That and when she didn't tell me right away and just turned the radio up things got worse, more expensive to fix. She is a Pollack, I think they are cheaper than Jews sometimes.

Other than that I got nothing.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't



Detroit iron rules all the rest are just toys.

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woodyhere
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Report this Post05-30-2014 07:10 PM Click Here to See the Profile for woodyhereClick Here to Email woodyhereSend a Private Message to woodyhereEdit/Delete MessageReply w/QuoteDirect Link to This Post
Does your Fiero have the weather-stripping between the rear window and deck? It was removed on a recall on a lot of cars. I bought my 87 new. After a few years there was a recall because of the bogus fire scares. When I picked up the car I could tell a huge difference right away. Sounded like the engine was in the passenger compartment. I bought a used seal from a fellow who listed several in the mall. The decrease in noise was dramatic. Don't forget the seals that go on the grills while your at it. It's a low cost definitely worth it fix.

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woodys 427

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Lou6t4gto
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Report this Post05-31-2014 12:45 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
If the SEAL on your rear glass is bad, you will get A lot of engine noise. just resealed mine. gong to put insulation behind the panel below the glass also.
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