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> D-Jet MPS Diaphragm Replacement/Tuning Kits - In Stock, Sale price ends tomorrow night, 12/30/2012
ChrisFoley
post May 30 2012, 10:20 AM
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I'm offering a kit which includes a diaphragm, o-rings and paper gasket, to rebuild D-Jet MPS units.
I already obtained an acceptable quotation on the most challenging component - new stamped beryllium copper diaphragm pieces.
The sample I used for CAD was the "triple ripple" shape which I think is the most recent design from Bosch.

The mild steel hub pieces will be zinc plated just like oem. We will swage the hubs onto the diaphragms in-house.
Your adjusting screws which thread into the diaphragms will be re-used with new o-ring provided in the kit. A new o-ring to seal the housing is also in the kit.

A new full load stop screw is the centerpiece of a tuning kit which also includes a special 7mm hollow hex driver and correctly sized flat blade screwdriver.
The stop screw has an 8mm hex thru hole instead of the large slot in the originals.
Adjustments will be made without removing the stop screw.

Someone else might be interested in providing assembly/adjustment services. I could do that too, but we aren't set up for it right now.

CAD:
Attached Image

Production pieces:
Attached Image

Edit 12/08/12: Final Production begins soon.
Current prices: Diaphragm Kits-$127.95; Tuning Kits-$46.95; Both Kits Together-$166.95. Shipping Included
Order from our Whats New Page.
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saigon71
post May 30 2012, 11:13 AM
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Count me in for at least one kit.

Thanks for setting this up - there is definitely a need...good used ones are getting hard to find and cost a lot of ca$h. I hope we get enough interest.
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dknechtly
post May 30 2012, 11:30 AM
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Great idea. Hard to be patient for 4 to 5 months. I'd be game.
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TheCabinetmaker
post May 30 2012, 11:32 AM
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would these be for any mps, or particular ones? I'm in for more than one regardless.
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falconfp2001
post May 30 2012, 11:50 AM
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Would have been in on this if it were not for MegaSquirt. (IMG:style_emoticons/default/aktion035.gif)
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DRPHIL914
post May 30 2012, 11:52 AM
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(IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/pray.gif)

chris, this is great! not having this piece is the main reason we have not been able to rebuild these ourselves without scavanging from others-- and the last one i got from automotion/eckler's (IMG:style_emoticons/default/slap.gif) was crap!!! and got returned. I have a box of 5 or 6 that either need new diaphragm, o-rings or both... so i will be in for a couple at least.

p.j.w.
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rwilner
post May 30 2012, 11:59 AM
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QUOTE(falconfp2001 @ May 30 2012, 01:50 PM) *

Would have been in on this if it were not for MegaSquirt. (IMG:style_emoticons/default/aktion035.gif)


(IMG:style_emoticons/default/agree.gif) In fact, the MPS and its status as an unobtainium unicorn is probably the #1 reason I went the MS route.
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falconfp2001
post May 30 2012, 12:46 PM
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QUOTE(rwilner @ May 30 2012, 10:59 AM) *

QUOTE(falconfp2001 @ May 30 2012, 01:50 PM) *

Would have been in on this if it were not for MegaSquirt. (IMG:style_emoticons/default/aktion035.gif)


(IMG:style_emoticons/default/agree.gif) In fact, the MPS and its status as an unobtainium unicorn is probably the #1 reason I went the MS route.


(IMG:style_emoticons/default/agree.gif) Plus the trigger points are NLA also. Being able to service the MPS is OK but if there is still no complete stock of replaceable parts for the D-Jet system then new systems are the way people will keep 914s on the road.
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phatnine11
post May 30 2012, 01:35 PM
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Looks promising! Please keep us posted on the progress and let us know the final amount and where to send money.
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ChrisFoley
post May 30 2012, 01:47 PM
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QUOTE(vsg914 @ May 30 2012, 12:32 PM) *

would these be for any mps, or particular ones? I'm in for more than one regardless.

AFAIK the same diaphragm is used in all MPS models. Different ones I've seen are the result of revisions to improve performance.
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brant
post May 30 2012, 01:56 PM
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I think the difference in 1.7s/2.0s are due to tuning more than diaphram.
Th MPS should need to be recalibrated, just as it would if you changed out for a workable "used" diaphram.

I would be interested in one
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rhodyguy
post May 30 2012, 02:31 PM
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i would take at least 1.

k
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rick 918-S
post May 30 2012, 02:36 PM
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Absolutely. Number one part that is killing our F.I. You can purchase a used one and it could be fatigued and fail in a day. If it helps I would commit to purchasing two. Send an pm when you make it. Storms hit here so I may miss the notice.
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reharvey
post May 30 2012, 02:42 PM
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I'm in
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bdstone914
post May 30 2012, 03:33 PM
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QUOTE(falconfp2001 @ May 30 2012, 11:46 AM) *

QUOTE(rwilner @ May 30 2012, 10:59 AM) *

QUOTE(falconfp2001 @ May 30 2012, 01:50 PM) *

Would have been in on this if it were not for MegaSquirt. (IMG:style_emoticons/default/aktion035.gif)


(IMG:style_emoticons/default/agree.gif) In fact, the MPS and its status as an unobtainium unicorn is probably the #1 reason I went the MS route.


(IMG:style_emoticons/default/agree.gif) Plus the trigger points are NLA also. Being able to service the MPS is OK but if there is still no complete stock of replaceable parts for the D-Jet system then new systems are the way people will keep 914s on the road.



I have about twenty sets of trigger points if anyone needs them.
$25 a set shipped. I did find new sets still available for about $135
Bruce
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bdstone914
post May 30 2012, 03:37 PM
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Chris,

I know a board member here (MDShantz) that does recalibration of them. He may be willing to do that so members could get a finished unit. Question is what price will the market bear?

I have about 20 mps units most of which are leakers.

Bruce
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Ian Stott
post May 30 2012, 03:41 PM
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Chris, I am not as technical as you guys so I am not sure what this does or where it fits. I have a 73 2.0, stock except for points replaced with the Pertronix module. I want to stay stock and this sounds like something I will need in the future and may even need now but don't know it! Could you explain in laymans terms what this means to us non technical people, if I need one I'm in!

Ian Stott
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76-914
post May 30 2012, 04:31 PM
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It's a rebuild kit for your MPS. Get one. If you don't need it now, you will later. The people how can rebuild/calibrate the MPS units are many. The berylium diaphram is unobtanium. I'm in for 1 or 2. And a million thank you's, Chris.
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StratPlayer
post May 30 2012, 04:36 PM
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JeffBowlsby
post May 30 2012, 07:18 PM
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I'd be in for one at first to see how it all works. Then I could potentially need 20-30 more for the box O cores in my stash. I can also assemble/calibrate for others.

Put me on the list. (IMG:style_emoticons/default/biggrin.gif)
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