D-Jet MPS Diaphragm Replacement/Tuning Kits - In Stock, Sale price ends tomorrow night, 12/30/2012 Options

[ChrisFoley]

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:


Production pieces:


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.

[JeffBowlsby]

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)

[rwilner]

I haven't seen Scott post in awhile but he was calibrating MPS's for a few members, he might be interested in doing it as a service.

[scott_in_nh]

I haven't seen Scott post in awhile but he was calibrating MPS's for a few members, he might be interested in doing it as a service.

Sorry for the lack of posts lately, The car is running great so I've been indulging myself in RC Helicopters....

I have access to the proper meter at work, but would consider purchasing one if I could break even doing some calibrations.

My experience indicates that at a minimum the factory calibration is way to lean if you have an aftermarket exhaust.

It also indicates that another couple of turns out gets you a good running car, but I think the right way to tune these is on the car with an oxygen sensor.

My theory is that with tightening emission standards they set cars to lean kill in the seventies, add 10% ethanol and you are leaner, popular mods and you are leaner still....

So be careful in what settings you ask for or be prepared to be dissapointed!
Chris I don't need one right now (I have a good copper one for now), but would be interested down the road.
If I "had" to buy one now to make it worth it to you I would.

[914_teener]

I haven't seen Scott post in awhile but he was calibrating MPS's for a few members, he might be interested in doing it as a service.

Sorry for the lack of posts lately, The car is running great so I've been indulging myself in RC Helicopters....

I have access to the proper meter at work, but would consider purchasing one if I could break even doing some calibrations.

My experience indicates that at a minimum the factory calibration is way to lean if you have an aftermarket exhaust.

It also indicates that another couple of turns out gets you a good running car, but I think the right way to tune these is on the car with an oxygen sensor.

My theory is that with tightening emission standards they set cars to lean kill in the seventies, add 10% ethanol and you are leaner, popular mods and you are leaner still....

So be careful in what settings you ask for or be prepared to be dissapointed!
Chris I don't need one right now (I have a good copper one for now), but would be interested down the road.
If I "had" to buy one now to make it worth it to you I would.

I agree from experience.

Recieved a rebuilt unit from FI Corp. They sealed the end so I would assume initially it was set. The car ran "ok" but I have found that it IS running lean...especially under full load.

I think they are also running a steel diaphragm as Ron says, so I am not sure if that is the problem or not. I know this....when I ran the original....it ran better through mid-range and top end for sure.

I am committed to FI but am yet to be convinced that the MS is better although the conversions done by a few look interesting.

I will be installing an AFR meter in the car and then reset the load settings if I can on the rebuilt unit.

I have digressed from the original post..... I am interested Chris.