Hood insulation: needed?

[BROKINBIMMER]

I was thinking of purchasing hood insulation back on, which was missing when I originally purchased the car. Does this help with some of the engine noise?

[Herr Faust Schinken]

i think its mainly so people don't burn there hands on the hood

[slaterd]

Believe it or not the insulation on the hood takes out the majority of the noise in the cabin. Without it the noise from the engine goes right through the hood and straight through the windshield. Glass is one of the worst sound deadening materials besides obvious metals, at least as far as I know.

[BROKINBIMMER]

Believe it or not the insulation on the hood takes out the majority of the noise in the cabin. Without it the noise from the engine goes right through the hood and straight through the windshield. Glass is one of the worst sound deadening materials besides obvious metals, at least as far as I know.

Is that why all I hear is my M20 singing tick tick tick...

[iamsam]

no, not needed. I strip it from most of the cars I own.

[slaterd]

Yep, when I bought my e30, the hood insulation was practically non existent...and yes that ticking was LOUD especially went on on-ramps!! I eventually got a newer one to replace it. I mean it wasn't a night and day kind of difference but it was definitely quieter in the cabin.

[enigmaticdream]

I pulled mine and haven't looked back.

[Raxe]

I didn't have it for years, then installed it one day and ripped it back out 10 minutes later. It doesn't affect the noise as far as I noticed, but it rubs on the intake manifold which is a big no-no.

[nando]

It is only for sound insulation.

[Threehz]

Yes, it's purpose is sound insulation.

Mine was shredded and falling apart when I bought the car so I stripped it, and I've been debating whether to get some fresh ones. Only reason I haven't is cost.

There are different kinds as well... I think the difference is older/newer models? (don't quote me)

My '91 uses the three-piece foam whereas I've seen the fibergass/paperboard type on other E30's.

Anyone know the differences between these?

[E30Jigzaw]

i was lookin for advice on this too lol i am taking mine off its falling apart any way hahaha

[Threehz]

I swear, everytime I would open my hood I'd be sweeping that shit off of everything. Like owning a cat.

[Herr Faust Schinken]

Yes, it's purpose is sound insulation.

Mine was shredded and falling apart when I bought the car so I stripped it, and I've been debating whether to get some fresh ones. Only reason I haven't is cost.

There are different kinds as well... I think the difference is older/newer models? (don't quote me)

My '91 uses the three-piece foam whereas I've seen the fibergass/paperboard type on other E30's.

Anyone know the differences between these?

my 88 325is has the fiberglass kind I'm kinda considering switching to the 3 piece kind

[Threehz]

If it is a late-model 'upgrade' it actually probably is better for sound reduction and can't be much heavier if at all. Definitely looks much cleaner than that fiberglass board.

[lolcantturn]

bump, does this actually reduce sound or no? My hood insulation is ugly as shit