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> Blend door foam, non Porsche question
narino
post Aug 25 2020, 08:35 PM
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My apologies if this is posted under the wrong topic section. I'm tearing my hair out and stuck. Unfortunately the mustang forums I post to had no replies.

I'm working on my other girl's heater core (91 mustang), and decided to redo all the foam on the blend doors. I saw on the interwebs that older cars supposedly had used 100% wool felt prior to foam becoming the popular material of choice. So I bought some, and stuck it on. Unfortunately the felt is too thick and it's not letting the door make a good seal when closed, see pic below. I have not been able to locate any thinner 100% wool felt. Supposedly the readily available 100% polyester felt found at craft stores will deteriorate after a few years. I also read the open cell foam from the big box stores would also fall apart after a few years. I really do not want to do this job twice. So here I am, with less hair and stuck.

Does anyone have any tips or a source for some felt or foam that would work for this application? Any insight would be greatly appreciated.

Thank you,

Jorge

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Chris914n6
post Aug 25 2020, 11:33 PM
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Maybe it was wool in the 60s mustang but the 914 uses foam. All the later cars I've seen have been closed cell foam which is what Vintage Air & others use.

In that application I doubt it was a whole sheet. More likely just the perimeter.
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Arno914
post Aug 26 2020, 03:08 AM
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Hello Jorge,

Maybe filter material (filter fleece) that is used to protect fans in tooling machines from dust will work? Should be available in industrial supply stores.

Greets, Arno

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narino
post Aug 26 2020, 08:27 AM
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Chris - I'll give Vintage Air a call. Maybe I can buy some foam from them?

Arno - Good idea with the filter fleece. If I can't find a foam source I'll buy some and see if fits.

Thanks guys!

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Chris914n6
post Aug 26 2020, 12:21 PM
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QUOTE(narino @ Aug 26 2020, 07:27 AM) *

Chris - I'll give Vintage Air a call. Maybe I can buy some foam from them?

It's readily available on amazon/ebay/aliexpress. It's also used in car sound deadening with PSA (Pressure Sensitive Adhesive).

example
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burton73
post Aug 26 2020, 12:41 PM
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Felt that is used for the bottom of furniture legs. Different thickness and it is very dense.

Take a look


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BillC
post Aug 26 2020, 01:48 PM
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Can you slice that layer of felt in half? Make it half the thickness?
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theer
post Aug 26 2020, 03:35 PM
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I googled “automotive wool felt” and found material as thin a 1/16”.

Unfortunately, it’s sold by the yard, so probably way more than you need. Try an car upholstery shop?
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narino
post Aug 26 2020, 03:55 PM
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I knew you guys would come up with a few different ways to attack the problem! In between the different wools/felt or foam one should be the right fit.

I'll report back once I test them out and find the goldilocks answer.

Thanks all!

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