Group buy interest-MPS Diaphragms, Just a thought. |
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Group buy interest-MPS Diaphragms, Just a thought. |
tracks914 |
Aug 12 2009, 09:36 PM
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#1
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Canadian Member Group: Benefactors Posts: 2,083 Joined: 15-January 03 From: Timmins, Ontario, Canada Member No.: 153 Region Association: None |
I'm having FI issues right now, lots of them. Today I got to the point of taking the MPS out of my 1.7 DD and put it into my 2.0 recent resto. I was surprised to see that the MPS out of my DD wouldn't hold vacuum. Being number 4 MPS to take apart this week I was only able to find one of them with a good diaphragm and that one I put into my 2.0.
Changing them really wasn't a big deal,(2 out of 10 for difficulty) but setting them up afterwords might be trickyer. As long as the original settings were maintained the car should run better than with a cracked diaphragm???? With most of these MPS's over 35 years old, there cannot be many of them still in good condition. I would be leery of buying used only to have it fail soon after buying. How hard would it be to have a batch of 200 diaphragms made up. I'm sure they would sell. BTW - took a good quality packing type tape and sealed up one side (outside) of the diaphragm and put it back into my DD. Very short term fix but it seemed to run a bit better for now. It can't be any worse than running with 2 big cracks 50% of the way around the old diaphragm. Just a thought. (IMG:style_emoticons/default/idea.gif) |
SLITS |
Aug 12 2009, 10:26 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
This was discussed many moons ago ad nauseum. Because of their compostion, they probably cannot be made in the US of the appropriate materials.
To create the die for stamping would have been costly from what I remember. Brett Instruments (now Fuel Injection Corp) tried using a steel stamping but due to flexibility characterics, it didn't work well. Best way is to buy used from any vehicle that used D-Jet (Audi, BMW, Volvo, VW, etc.,) and try to find one that holds vacuum. Remove the diaphram and place it in the one you need (or at least that's what I think would be the best solution). Otherwise ..... by an aftermarket EFI setup that uses current components. Geoff Blyseng used to repair them and had the ability to adjust them. |
bigkensteele |
Aug 12 2009, 11:14 PM
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#3
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Major Member Group: Members Posts: 2,197 Joined: 30-August 04 From: Cincinnati, OH Member No.: 2,660 Region Association: South East States |
Because of their compostion, they probably cannot be made in the US of the appropriate materials. Another case of our congress knee-capping US manufacturers with ludicrous regulations and then blaming those same manufacturers for moving jobs overseas. Just an observation. Not meaning to (IMG:style_emoticons/default/stirthepot.gif) |
McMark |
Aug 13 2009, 12:20 AM
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#4
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Then don't post inflammatory political comments that are irrelevant. (IMG:style_emoticons/default/rolleyes.gif) |
saigon71 |
Aug 13 2009, 04:52 AM
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#5
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Senior Member Group: Members Posts: 1,999 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
Doug:
I would be very interested in such a purchase. However, I question if it is even possible to do. I just went through this with my D-jet. Found my diaphram to be cracked, ordered two used ones (as you know, they are not cheap) and got only one that actually worked. Please let me know if you come up with anything. Bob |
tat2dphreak |
Aug 13 2009, 09:53 AM
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#6
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
Because of their compostion, they probably cannot be made in the US of the appropriate materials. Another case of our congress knee-capping US manufacturers with ludicrous regulations and then blaming those same manufacturers for moving jobs overseas. Just an observation. Not meaning to (IMG:style_emoticons/default/stirthepot.gif) wow, that wasn't just from left field, it was from the minor league ballpark across town... (IMG:style_emoticons/default/WTF.gif) I don't know about the MPS composition, but I agree with SLITS, replacing it with a modern replacement or using a used one is the only ways I can see to fix the issue. but there has been talk of Bosch re-manufacturing many parts again... and I would hope the MPS or MPS diaphram would be high on that list. |
brant |
Aug 13 2009, 03:17 PM
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#7
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
from my memory and the old discussions
the diaphram had nothing to do with congress or small business its the actual material that is the problem the original diaphram had (was it?) beryllium in it the alloy characteristics made it good for the specifications that were used to design the MPS the replacement diaphrams of other alloys do now work well due to their different compound characteristics... I'm not blaming congress for trying to reduce radiation and cancer safety.. by the way to the original thread starter. you MUST have your MPS recalibrated to keep the motor happy and get the correct AFR's now that you've "rebuilt" it. brant |
SLITS |
Aug 13 2009, 04:11 PM
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#8
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
It's a Beryllium / copper alloy that cannot be produced in the US as the "B" part is the problem.
And I don't consider BigKenSteele's comment to be inflamatory ... it's just the truth (and applies to many more things than this issue). Primarily what you want in a used MPS from ANY car is a vacuum test. If it holds, the probability is the diaphram is good. Other leak areas could be the seals around the electrical connector and/or the case halves. The rebuilders I talk to do just what I described earlier. Next best option would be for someone with adequate knowledge that can detail the electrical impulse characteristics to match up those characteristics with a modern MPS (like used on a Jeep). I don't have the knowledge so I ain't gonna try. As far as Bosch reproducing the MPS ... don't hold your breath as you might turn really blue. Market is to limited to gear up for production. |
underthetire |
Aug 13 2009, 04:58 PM
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#9
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Be, even be-copper is available in the US. It does not cause cancer or make your testies fall off. It's BE dust that causes problems very close to asbestos problems in the lungs. BE Copper has never been a problem, since the BE is bonded in the copper in small amounts. It can not get airborne to case problems. And you must be "allergic" or sensitized to BE to even be a problem. Wyman Gordon is the US's largest producer of BE products, and your golf clubs probably have BE Copper in them still today. Tooling however to stamp these out would be expensive.
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r_towle |
Aug 13 2009, 05:29 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 |
Like Slits said....we went down this road, but I wont discourage anyone from trying again.
At the time, we could not find a machine shop that would work on BE copper in such a small run. Like was said above, it is used in certain products, unfortunately, BE copper requires a sealed chamber to reduce the affects of the dust and the main shops that use it are aerospace shops.....and they dont sub out work. Given the current available bandwidth in the automotive industry, it may be easier to find a shop that will make a run or several hundred for a reasonable price. I suspect the deal would be easiest if you contact and find the BE machine shop that is setup to do this, then involve fuel Injection corp to see if the tooling still exists. I am willing to bet you could sell 100 right here. Rich |
underthetire |
Aug 13 2009, 05:50 PM
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#11
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Like Slits said....we went down this road, but I wont discourage anyone from trying again. At the time, we could not find a machine shop that would work on BE copper in such a small run. Like was said above, it is used in certain products, unfortunately, BE copper requires a sealed chamber to reduce the affects of the dust and the main shops that use it are aerospace shops.....and they dont sub out work. Given the current available bandwidth in the automotive industry, it may be easier to find a shop that will make a run or several hundred for a reasonable price. I suspect the deal would be easiest if you contact and find the BE machine shop that is setup to do this, then involve fuel Injection corp to see if the tooling still exists. I am willing to bet you could sell 100 right here. Rich Sealed chamber?? Not quite. Just need approved Hepa ventilation, and tyvek suits. I know of at least 2 shops in Santa Clara alone that do BE copper. They will not do straight BE. They are also starving to death in this economy. It would be a good time to try again. |
r_towle |
Aug 13 2009, 05:54 PM
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#12
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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 |
Like Slits said....we went down this road, but I wont discourage anyone from trying again. At the time, we could not find a machine shop that would work on BE copper in such a small run. Like was said above, it is used in certain products, unfortunately, BE copper requires a sealed chamber to reduce the affects of the dust and the main shops that use it are aerospace shops.....and they dont sub out work. Given the current available bandwidth in the automotive industry, it may be easier to find a shop that will make a run or several hundred for a reasonable price. I suspect the deal would be easiest if you contact and find the BE machine shop that is setup to do this, then involve fuel Injection corp to see if the tooling still exists. I am willing to bet you could sell 100 right here. Rich Sealed chamber?? Not quite. Just need approved Hepa ventilation, and tyvek suits. I know of at least 2 shops in Santa Clara alone that do BE copper. They will not do straight BE. They are also starving to death in this economy. It would be a good time to try again. Step up to the plate my friend... I know Geoff and myself have tried in the past. Let us know what you find out please...I would sure buy more than a few. Rich |
underthetire |
Aug 13 2009, 06:11 PM
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#13
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
Like Slits said....we went down this road, but I wont discourage anyone from trying again. At the time, we could not find a machine shop that would work on BE copper in such a small run. Like was said above, it is used in certain products, unfortunately, BE copper requires a sealed chamber to reduce the affects of the dust and the main shops that use it are aerospace shops.....and they dont sub out work. Given the current available bandwidth in the automotive industry, it may be easier to find a shop that will make a run or several hundred for a reasonable price. I suspect the deal would be easiest if you contact and find the BE machine shop that is setup to do this, then involve fuel Injection corp to see if the tooling still exists. I am willing to bet you could sell 100 right here. Rich Sealed chamber?? Not quite. Just need approved Hepa ventilation, and tyvek suits. I know of at least 2 shops in Santa Clara alone that do BE copper. They will not do straight BE. They are also starving to death in this economy. It would be a good time to try again. Step up to the plate my friend... I know Geoff and myself have tried in the past. Let us know what you find out please...I would sure buy more than a few. Rich I'll get in touch with the lead in one of the shops, see what he says. |
r_towle |
Aug 13 2009, 06:16 PM
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#14
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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 |
Like Slits said....we went down this road, but I wont discourage anyone from trying again. At the time, we could not find a machine shop that would work on BE copper in such a small run. Like was said above, it is used in certain products, unfortunately, BE copper requires a sealed chamber to reduce the affects of the dust and the main shops that use it are aerospace shops.....and they dont sub out work. Given the current available bandwidth in the automotive industry, it may be easier to find a shop that will make a run or several hundred for a reasonable price. I suspect the deal would be easiest if you contact and find the BE machine shop that is setup to do this, then involve fuel Injection corp to see if the tooling still exists. I am willing to bet you could sell 100 right here. Rich Sealed chamber?? Not quite. Just need approved Hepa ventilation, and tyvek suits. I know of at least 2 shops in Santa Clara alone that do BE copper. They will not do straight BE. They are also starving to death in this economy. It would be a good time to try again. Step up to the plate my friend... I know Geoff and myself have tried in the past. Let us know what you find out please...I would sure buy more than a few. Rich I'll get in touch with the lead in one of the shops, see what he says. Fuel Injection Corp/Brett Instruments may have tooling. Rich |
tod914 |
Aug 13 2009, 07:54 PM
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#15
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
How is Fuel Inj corp reproduceing the diaphrams? Was just thinking that Rich.
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r_towle |
Aug 13 2009, 07:56 PM
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#16
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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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tod914 |
Aug 13 2009, 07:59 PM
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#17
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
Looks more like brass/copper, I just took one apart to reseal it. Seems the curves are not as smooth as the original materials from what we seen on prior posts with graphs.
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SLITS |
Aug 13 2009, 09:10 PM
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#18
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Well, if Bob Smith (Fuel Injection Corporation) would let you talk to Don (ex-owner) of Brett Instruments, you might get some information. I had one run in with him and won't talk to him again ... I don't even like to sell them cores.
Secondly, you would have to talk to Bosch GMBH to find out the characteristics of the alloy they used to match the flex characteristics. Like Porsche and many others, they may not be forthcoming with the information. I suppose you could have one analyzed to see if the alloy could be duplicated. I'm speculating here ... I know the rebuilding end (the exowner of Python is a personal friend), but I don't know the production end of the disc other than the die would probably be very expensive. I know that Python Industries and Fuel Injection Corporation, for two, would probably be interested in obtaining them. MB owners were clamoring for rebuilt MPSs at one time (not to mention Volvo, BMW, VW, etc). Getting rebuilders to pay their bills might be quirky. (IMG:style_emoticons/default/dry.gif) None are doing really well at this time. Thirdly, could one access the seals used around the electrical plug and housing halves. I have seen some rebuilt that used gasket material in an attempt to get a seal, Geoff used a WaveTech to calibrate them as far as I remember. You would have to have a new unit to get the values as I remember. Oh well .... Good Luck ... I would like to see it happen |
r_towle |
Aug 13 2009, 09:15 PM
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#19
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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 |
Search here or on the other site.
A metal guy tested the hardness etc and posted the results. This is 3-4 years ago. Rich |
SLITS |
Aug 13 2009, 09:21 PM
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#20
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
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