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.

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...

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.

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.

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.

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

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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.

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

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.