 Air filter adapter for '73 1.7, Makes new filters work |
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| BillC |
 Feb 19 2017, 03:29 PM
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#1
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Senior Member  Group: Members Posts: 581 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region 
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I have a '73 1.7 liter 914 that has been running a stock air filter element for far longer than I've owned the car. I've been looking for a while to find a replacement air filter that would just drop in, but nobody seems to make them any more (I've searched on this board, and the questions go back a looong time).
However, it turns out that a NAPA Gold 2011 will work, if you make an adapter. Since I finally had a little spare time this weekend, it was time to make one. It's fairly simple: A piece of 16ga aluminum, with an inner hole to match the stock filter and an outer diameter to match the new filter. Around the outside perimeter, I added 4 small tabs, bent up to keep the new filter in place. I also put a ring of 1/16" thick weather stripping around the underside of inside perimeter, to seal the adapter against the bottom of the air filter housing. Here are a few pics: Here are the air filters, new on the left and original on the right.  Here's the adapter next to new filter.  Here's the new filter and adapter installed in the air filter housing.  With the adapter, the new filter fits in very nicely into the air filter housing. Now I'll be able to keep my car in clean, new air filters for a long time. |
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| 913B |
Feb 19 2017, 05:00 PM
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#2
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Senior Member Group: Members Posts: 855 Joined: 25-April 05 From: South Bay/SoCal Member No.: 3,983 Region Association: None |
Thats pretty cool. I will have to remember that next time I find a piece of aluminmum.
Great Job ! (IMG:style_emoticons/default/first.gif) |
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| boxsterfan |
Feb 19 2017, 05:22 PM
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#3
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
Super cool!! Way cheaper than ripping the motor out and stuffing in a /6!! (IMG:style_emoticons/default/smile.gif)
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| doug_b_928 |
Feb 20 2017, 02:14 PM
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#4
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Senior Member Group: Members Posts: 713 Joined: 17-January 13 From: Winnipeg Member No.: 15,382 Region Association: Canada |
Nicely done.
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| stinkindiesel |
Feb 20 2017, 04:18 PM
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#5
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Member Group: Members Posts: 184 Joined: 14-June 13 From: Georgetown, TX Member No.: 16,012 Region Association: Southwest Region |
The adapter is a nice solution.
I'm running a Wix 42110 with an internal dimension of 127mm, 76mm tall. This is very close to the OEM filter, though the OEM has a larger outer dimension. I had thought at first I might need to cut a gasket to make the Wix a little taller in order to seal well, but found I didn't need it. I think the NAPA 2110 is the same. Gary |
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| JawjaPorsche |
Feb 23 2017, 06:23 AM
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#6
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Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
Awesome! Made one yesterday from some aluminum flashing I still had left when I build my house. Thank you so much for the tip.
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