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    Hood insulation: needed?

    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?

    #2
    i think its mainly so people don't burn there hands on the hood
    88 325is Five Speed
    Lachssilber

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      #3
      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.
      Originally posted by Wh33lhop
      This is r3v. Check your vaginal sand at the door.

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        #4
        Originally posted by slaterd View Post
        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...

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          #5
          no, not needed. I strip it from most of the cars I own.

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            #6
            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.
            Originally posted by Wh33lhop
            This is r3v. Check your vaginal sand at the door.

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              #7
              I pulled mine and haven't looked back.
              1986 911 Supercharged Frakenstrat/Stripped
              1987 325is Delphin/Black (Olga)
              1988 M3 Zinno/Natur (Elsa)

              Manual or STFU

              E30 Chapter of BMW Car Club of America
              E30 Oktoberfest 2017

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                #8
                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.

                >> 1988 3.1 ITB E30 /// 2002 E46 M3 6MT / 2008 335xi 6MT / 1991 S38B36 E30 (sold)

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                  #9
                  It is only for sound insulation.
                  Build thread

                  Bimmerlabs

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                    #10
                    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?
                    Different strokes for different folks.

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                      #11
                      i was lookin for advice on this too lol i am taking mine off its falling apart any way hahaha
                      Buy e30 cup holders
                      http://www.r3vlimited.com/board/show...41#post4159541

                      Buy BMW Motosports handles
                      http://www.r3vlimited.com/board/showthread.php?t=302846

                      Buy BMW MOTORSPORT valve covers http://www.r3vlimited.com/board/showthread.php?t=330146

                      sigpic

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                        #12
                        I swear, everytime I would open my hood I'd be sweeping that shit off of everything. Like owning a cat.
                        Different strokes for different folks.

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                          #13
                          Originally posted by Threehz View Post
                          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
                          88 325is Five Speed
                          Lachssilber

                          Comment


                            #14
                            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.
                            Different strokes for different folks.

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                              #15
                              bump, does this actually reduce sound or no? My hood insulation is ugly as shit
                              Originally posted by TSI
                              ♫ Rust flecks are falling on my head...♫
                              OEM+

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