 Fun with MPS diaphragms |
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| JeffBowlsby |
 Aug 1 2017, 10:38 PM
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#1
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914 Wiring Harnesses  Group: Members Posts: 8,510 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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Thought you might be interested to see some of the diaphragms I have come across, from various MPS cores. All are from either 1.7L or 2.0L 914 MPS cores.
1st on the left is unbelievable...looks like the bottom of a soup can or someones creative attempt at hand making a diaphragm. The two on the far right are essentially identical, an original on top and one of Tangerine Racings excellent repro diaphragms below it for comparison. This late style diaphragm is from the 73-76 2.0L MPS's. Attached thumbnail(s) 
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Replies(1 - 9)
| 914Sixer |
Aug 2 2017, 04:44 AM
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#2
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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The early ones are probably what prompted the design change to make more rings in the diaphramgs to keep from blowing them out.
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| rmital |
Aug 2 2017, 08:03 AM
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#3
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Northeast optimist Group: Members Posts: 1,947 Joined: 12-December 05 From: Park Ridge, NJ Member No.: 5,268 |
love seeing this stuff, thanks for posting Jeff... (IMG:style_emoticons/default/flag.gif)
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| Dave_Darling |
Aug 2 2017, 09:38 AM
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#4
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Hey, wait--the original diaphragm on the right looks like it has a brass threaded part! Tangerine's is steel or other white metal! You might lose concours points for that, if the judges have Xray vision!!! (IMG:style_emoticons/default/biggrin.gif)
--DD |
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| 76-914 |
Aug 2 2017, 09:47 AM
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#5
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,502 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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Yep, Thx for posting this Jeff. (IMG:style_emoticons/default/beerchug.gif)
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| ChrisFoley |
Aug 2 2017, 10:40 AM
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#6
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I am Tangerine Racing Group: Members Posts: 7,926 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(Dave_Darling @ Aug 2 2017, 11:38 AM)  Hey, wait--the original diaphragm on the right looks like it has a brass threaded part! Tangerine's is steel or other white metal! You might lose concours points for that, if the judges have Xray vision!!! (IMG:style_emoticons/default/biggrin.gif) --DD It's probably just plated with yellow cad instead of zinc. I don't think I've seen any that way previously and was planning to comment on it too. |
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| JeffBowlsby |
Aug 2 2017, 11:21 AM
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#7
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914 Wiring Harnesses Group: Members Posts: 8,510 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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QUOTE(Racer Chris @ Aug 2 2017, 09:40 AM) QUOTE(Dave_Darling @ Aug 2 2017, 11:38 AM) Hey, wait--the original diaphragm on the right looks like it has a brass threaded part! Tangerine's is steel or other white metal! You might lose concours points for that, if the judges have Xray vision!!! (IMG:style_emoticons/default/biggrin.gif) --DD It's probably just plated with yellow cad instead of zinc. I don't think I've seen any that way previously and was planning to comment on it too. I have several of those, let me dig them out and see if that one is an anomaly. |
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| ChrisFoley |
Aug 2 2017, 11:27 AM
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#8
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I am Tangerine Racing Group: Members Posts: 7,926 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(Jeff Bowlsby @ Aug 2 2017, 12:38 AM) ... 1st on the left is unbelievable...looks like the bottom of a soup can or someones creative attempt at hand making a diaphragm. ... That looks almost exactly like the ones we remove from units rebuilt by FIC. They cut away most of the original diaphragm from the hub and crudely solder a mostly handmade brass piece (with pressed ribs) in its place. |
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| worn |
Aug 2 2017, 12:13 PM
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#9
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can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(Jeff Bowlsby @ Aug 1 2017, 08:38 PM) The two on the far right are essentially identical, an original on top and one of Tangerine Racings excellent repro diaphragms below it for comparison. This late style diaphragm is from the 73-76 2.0L MPS's. And again time to thank you Jeff as master curator and guru, and Chris for taking the trouble to correctly reproduce the parts. You are bad, and nation-wide. So to speak. |
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| r_towle |
Aug 2 2017, 04:27 PM
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#10
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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You need a new definition of fun!
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