ECU/MPS Compatibility for 2056, D-Jet Experts? Options

[BeatNavy]

Getting everything together to install a 2056 into my '72 and swap out the steady, reliable 1.7L I've been running. The 2056 is '73 but came with '74 ECU/MPS combo. The part numbers are 049 on the MPS and 044 on the ECU. Sometimes I'm not sure if I read that ECU/MPS compatibility table on Anders D-Jet site correctly. Is the 049/044 a winning combination?

Also, I've read here that a 2056 really should run with an adjustable MPS. A couple of months ago I converted my 1.7L MPS to adjustable with the Tangerine kit. Any thoughts on whether I could effectively run my MPS (007) just by adjusting it appropriately, or are there other compatibility issues? Or do I need to make that '74 MPS adjustable?

Thanks for the help.

[JeffBowlsby]

Hey Rob, I'm no DJet expert but I think there are som issues here.

An 049 MPS is a 1.7L MPS. It cannot be recalibrated to the needs of a 2056 engine.

The 044 ECU is the 1974 2.0L ECU and that should work for the 2056.

You need an 043 MPS that is recalibrated for a wider pulse width range than the standard calibration, not the 007 MPS (is that a 1.7L MPS also?) The 1.7L MPS does not have the adjustability range of the 2.0L MPS's because it lacks an internal spacer.

Almost all MPS are adjustable, a few of the earliest MPS for early D-Jet VWs and Benz's are not, but they are not in the 914 dialogue.

[BeatNavy]

Hi Jeff -- thanks for the reply. Now I see where the 049 is listed as a 1.7L MPS on that site. Yeah, I'm not reading that table correctly.

So I have a 007 and a 049 MPS, neither of which are really compatible with that ECU or 2.0L, right? I should be looking for a 043 MPS.

[Bleyseng]

As long as:
You have a stock grind cam with your 2056 the 044 ECU is fine.
The 049 can be adjusted to run with the 2056 no problem as it can be reset to the 043 specs.
The 007 can be adjusted too to run with the 2056 IIRC

If you have a nonstock cam like a Raby 9550 or a Web73 only the 049 can be adjusted to run with the 2056 because it doesn't have the inner cast stop ring in the cover which limits the amount of travel/adjustability for WOT

Make sure you have the correct 012 CHT!

[BeatNavy]

Hi Geoff -- good info, thanks. Cam is stock. Sounds like I may be able to experiment with either the 007 or go ahead and make the 049 adjustable. I'll make sure I have the right CHT.

Thanks guys.

[JeffBowlsby]

The 049 can be adjusted to run with the 2056 no problem as it can be reset to the 043 specs.
The 007 can be adjusted too to run with the 2056 IIRC

You must be adding the 2.0L spacer to these 1.7L MPS's Geoff? I have not had success in recalibrating the 1.7L MPS's due to their shortened calibration range. I have found even the 2.0L to be at their limit when recalibrating them for a 2056.

[914_teener]

The 049 can be adjusted to run with the 2056 no problem as it can be reset to the 043 specs.
The 007 can be adjusted too to run with the 2056 IIRC

You must be adding the 2.0L spacer to these 1.7L MPS's Geoff? I have not had success in recalibrating the 1.7L MPS's due to their shortened calibration range. I have found even the 2.0L to be at their limit when recalibrating them for a 2056.

The Anders site is not specific on the MPS housings.

I am looking for the same answer as the OP.

So........do you need the 2.0 liter MPS housing to match a 2056.

Will the 1.7 housing work with a 2056 ?

[Bleyseng]

The 049 can be adjusted to run with the 2056 no problem as it can be reset to the 043 specs.
The 007 can be adjusted too to run with the 2056 IIRC

You must be adding the 2.0L spacer to these 1.7L MPS's Geoff? I have not had success in recalibrating the 1.7L MPS's due to their shortened calibration range. I have found even the 2.0L to be at their limit when recalibrating them for a 2056.

Yes, I add the inner spacer to 049's if going to 2.0l specs but the difference between a 049 and a 043 is mostly at WOT.

For a 2056 a stock set 043 works but should be checked with a O2 wideband.

[BeatNavy]

So Geoff, would you say my best bet is to either:

1. Source a 043 and make it adjustable

or

2. Make the 049 adjustable with a spacer? I'm not familiar with this spacer. I've used the Tangerine MPS repair/adjustment kit. Do you know if that is part of that (maybe it is but can't remember)?

Thanks for da' help.

[Bleyseng]

I have some spacers but you have to take apart the MPS to install it and recalibrate it with a Waveteck to 043 specs.
All MPS's can be made adjustable if you don't epoxy the WOT stop in and for that I use teflon tape to hold the WOT stop in place when it's screwed in. The adjustment for the AFR is inside via the hole once you take out the WOT stop.

[BeatNavy]

I have some spacers but you have to take apart the MPS to install it and recalibrate it with a Waveteck to 043 specs.
All MPS's can be made adjustable if you don't epoxy the WOT stop in and for that I use teflon tape to hold the WOT stop in place when it's screwed in. The adjustment for the AFR is inside via the hole once you take out the WOT stop.

Hi Geoff - I've installed the Tangerine diaphragm and adjustment setup on my 007 MPS. I could do that on the 049. I don't have a wavetek but do have an AFR. A little googling and I found out the spacers were part of the original 2.0 MPS to increase the travel distance.

Maybe I'll try the different MPS's I have, see how they run, and then decide if I need to source a 043....

[AndyB]

Geoff,

Do you have a picture of this spacer? Thanks

[brant]

I'd love to buy a spacer...
or if these are all old stock, I wonder if we can have a few made?

[Phoenix914]

(IMG:style_emoticons/default/popcorn[1].gif)

Rob, thanks for starting this thread.

I also have a 2056 with D-Jet, but the cam is more suited for carbs. I didn't build this engine, but it's the one I have, and I know some things need to be adjusted to make it more driveable. It wouldn't surprise me if my MPS needs adjustment or reconditioning.

[Bleyseng]

Pic of inside a early cover showing the cast in stop ring. The spacer looks like the paper gasket in the pic except its thicker of course. I don't have one handy for a pic.

[BeatNavy]

(IMG:style_emoticons/default/popcorn[1].gif)

Rob, thanks for starting this thread.

I also have a 2056 with D-Jet, but the cam is more suited for carbs. I didn't build this engine, but it's the one I have, and I know some things need to be adjusted to make it more driveable. It wouldn't surprise me if my MPS needs adjustment or reconditioning.

My motives were 100% selfish but you're welcome! (IMG:style_emoticons/default/rolleyes.gif) If you need to recondition or make your MPS adjustable, the kit from Tangerine is great and comes with very good instructions. I also have a bunch of pictures I took of the process I can share.

Pic of inside a early cover showing the cast in stop ring. The spacer looks like the paper gasket in the pic except its thicker of course. I don't have one handy for a pic.

Yeah, thanks Geoff. Not that you are looking to be the "MPS spacer vendor" or anything but if you have extra looks like there are a couple of us that would be interested.

Going through this process and doing some research it appears my 0 280 100 007 isn't a 914 original part and may be designed for Type III. Someone may have used that out of convenience during a rebuild years ago. The MPS that came with my 2056 IS meant for a 1.7. So maybe I swap MPS's and see if I can tune the 007 to work with the 2056 and/or start sourcing for a 043.

This has been very helpful, Geoff (and Jeff). Thanks.

[AndyB]

Geoff,

Other then being cast this way, some MPS units don't have the cast stop. Is there any reason for not machining off this part? It would seem that the screw still cannot go any further then its max setting. Does this logic make sense?

[ChrisFoley]

I have a spacer in my spare parts collection. Thickness is .023".
I didn't realize they were only found in 049 units and that they went between the part load plate and the diaphragm to increase the distance to the part load plate.

It shouldn't be too hard for me to make a pattern for my laser shop to use.
I'll have them made in stainless so no need for plating.

[brant]

I'm struggling to visualize this...
but I want one for my MPS spares
I just changed out a housing to avoid the stop-casting, and may need this spacer also?

haven't road tested yet with the innovate

[BeatNavy]

I have a spacer in my spare parts collection. Thickness is .023".
I didn't realize they were only found in 049 units and that they went between the part load plate and the diaphragm to increase the distance to the part load plate.

It shouldn't be too hard for me to make a pattern for my laser shop to use.
I'll have them made in stainless so no need for plating.

Chris, that would be great! Just to be clear though -- I think they're only found in 043 units if I'm reading the posts accurately. Is that correct?