Noise levels for a 2.0 L FI set up - interior vs exterior padding |
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Noise levels for a 2.0 L FI set up - interior vs exterior padding |
Tdskip |
Dec 18 2019, 11:23 AM
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#1
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
Good morning, hope everybody’s having a good week so far. I know that from the factory there was padding in the engine compartment as well as having an interior back pad. My question is if I put additional sound deadening on the inside and then the back pad is that roughly equivalent to the sound pad that was in the engine bay originally?
I’m sure not having the pad in the engine compartment does lead to increased noise, but not sure how dramatic of an increase that would be with a fuel injected car. I know this is a subjective topic, but looking for experiences and thoughts if you don’t mind sharing them. I’d like the car to be civilized and usable for fall day driving without feeling overly fatigued ( which I am comfortable doing another vintage cars and don’t feel the need to have a modern vehicle to do ). Thanks! |
914Sixer |
Dec 18 2019, 12:28 PM
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#2
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914 Guru Group: Members Posts: 8,887 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
I am guessing that there is/was benefits to adding engine compartment insulation because 70,71, some 72 cars had none. Porsche engineers must have though it a plus. The negative side of if was the poor choice of material that held water and caused massive back wall rust. Wondering if some insulation on the engine lid might also help noise level in cockpit since the back window is also an entry port. Choice of exhaust is the big culprit in a lot of cases.
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Mark Henry |
Dec 18 2019, 05:03 PM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I am guessing that there is/was benefits to adding engine compartment insulation because 70,71, some 72 cars had none. Porsche engineers must have though it a plus. The negative side of if was the poor choice of material that held water and caused massive back wall rust. Wondering if some insulation on the engine lid might also help noise level in cockpit since the back window is also an entry port. Choice of exhaust is the big culprit in a lot of cases. It depends, granted my car has always had a sheltered life, but when I removed the back pad I didn't find a speck of rust. I cut a BFH in my firewall for access to the /6 but when it was done I cut to fit the stock back pad back in place. I installed it a half inch high at the bottom just to be sure water can't be trapped there. I also cut and replaced the inner rubberized tar mat. I have a weber /6 with a stock 911 banana, my interior noise levels are good, you can carry on a normal conversation with a passenger. I'm keeping the pad. BTW the "BFH" in this case = Big Fuching Hole (IMG:http://www.914world.com/bbs2/uploads/post-26-1497236248.jpg) (IMG:http://www.914world.com/bbs2/uploads/post-26-1497236287.jpg) |
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