Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Are the various years MPS interchangeable?
Tdskip
post Dec 27 2018, 08:16 AM
Post #1


Advanced Member
****

Group: Members
Posts: 3,686
Joined: 1-December 17
From: soCal
Member No.: 21,666
Region Association: None
I have a couple of these hanging around and I’m not sure if they are all interchangeable or not?

I thought there were some differences between the different systems (1.7 vs 2.0) but wanted to ask. As of now everything is carefully associated with the complete system that was part of.

Thanks!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TravisNeff
post Dec 27 2018, 08:28 AM
Post #2


914 Guru
*****

Group: Members
Posts: 5,082
Joined: 20-March 03
From: Mesa, AZ
Member No.: 447
Region Association: Southwest Region
Yes they are, you will have to re re calibrate them (I think RacerChris does this) to fit between a 1.7 and a 2.0. I believe that the difference is in the full load stop setting, which is controlled by the screw in the end of the unit behind the epoxy plug
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BeatNavy
post Dec 27 2018, 08:37 AM
Post #3


Certified Professional Scapegoat
****

Group: Members
Posts: 2,924
Joined: 26-February 14
From: Easton, MD
Member No.: 17,042
Region Association: MidAtlantic Region
There are differences. You can generally get a car to start, and run somewhat reasonably, with just about any of them, but it's not a long-term solution or good for your engine.

More than you ever wanted to know about the mighty MPS: https://members.rennlist.com/pbanders/manif...sure_sensor.htm
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Tdskip
post Dec 27 2018, 08:48 AM
Post #4


Advanced Member
****

Group: Members
Posts: 3,686
Joined: 1-December 17
From: soCal
Member No.: 21,666
Region Association: None
Thanks gentlemen.

I assume there is a part number on the body?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BeatNavy
post Dec 27 2018, 08:53 AM
Post #5


Certified Professional Scapegoat
****

Group: Members
Posts: 2,924
Joined: 26-February 14
From: Easton, MD
Member No.: 17,042
Region Association: MidAtlantic Region
QUOTE(Tdskip @ Dec 27 2018, 09:48 AM) *

Thanks gentlemen.

I assume there is a part number on the body?

Yes. Typically a Bosch or Porsche/VW part number. You can use this link on the same site to cross reference: https://members.rennlist.com/pbanders/djetparts.htm

If you find a P/N that doesn't match any on that site it probably had another application (e.g., Mercedes) as D-Jet was used in several brands of cars back in the day.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TravisNeff
post Dec 27 2018, 09:01 AM
Post #6


914 Guru
*****

Group: Members
Posts: 5,082
Joined: 20-March 03
From: Mesa, AZ
Member No.: 447
Region Association: Southwest Region
1.7L 1970 - 1973
VW/Porsche part number: 022 906 051 E
Bosh part number: 0 280 100 049

I was lucky when I got my 2.0 DJET engine, Brad Anders came over to my house and helped me get things running and taught me a whole bunch on DJET!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Tdskip
post Dec 27 2018, 09:05 AM
Post #7


Advanced Member
****

Group: Members
Posts: 3,686
Joined: 1-December 17
From: soCal
Member No.: 21,666
Region Association: None
Thanks guys, appreciate the info!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Dec 27 2018, 09:42 AM
Post #8


914 Wiring Harnesses
*****

Group: Members
Posts: 8,501
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None
No, not interchangeable.

For 914 2.0L's there are two different MPS's, and their PNs end in 037 (1973-only), and 043 (1974-76). These are physically the same internally but are calibrated differently for compatibility with their respective ECU's, which are also different.

The 914 1.7L has a single MPS, PN ending in 049. It is physically different internally and calibrated differently, from the 2.0L MPS's for compatibility with the 1.7L ECU's.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Tdskip
post Dec 27 2018, 10:34 AM
Post #9


Advanced Member
****

Group: Members
Posts: 3,686
Joined: 1-December 17
From: soCal
Member No.: 21,666
Region Association: None
Thanks Jeff (and all)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bleyseng
post Dec 27 2018, 01:23 PM
Post #10


Aircooled Baby!
**********

Group: Members
Posts: 13,034
Joined: 27-December 02
From: Seattle, Washington (for now)
Member No.: 24
Region Association: Pacific Northwest
The only difference to adjusting a early 1.7 one to a 2.0L is the WOT stop ring in the cover. Later 049,037 and 043 MPS's don't have this ring. I suppose you could machine it off and the calibrate the MPS, never done that.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914_teener
post Dec 27 2018, 01:43 PM
Post #11


914 Guru
*****

Group: Members
Posts: 5,197
Joined: 31-August 08
From: So. Cal
Member No.: 9,489
Region Association: Southern California
Tom,

The MPS that I sold you is correct for a 2.0 and was the MY 74.

It was already calibrated by Jeff and was tested in a 2.0.

It was not setup for a 1.7...... so not interchangeable....unless you re calibrate it.

FWIW...if you need one for a 1.7, I am sure there are a few good ones floating around.

Rob
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
euro911
post Dec 27 2018, 02:00 PM
Post #12


Retired & living the dream. God help me if I wake up!
*****

Group: Members
Posts: 8,849
Joined: 2-December 06
From: So.Cal. & No.AZ (USA)
Member No.: 7,300
Region Association: Southern California
QUOTE(JeffBowlsby @ Dec 27 2018, 07:42 AM) *
No, not interchangeable.

For 914 2.0L's there are two different MPS's, and their PNs end in 037 (1973-only), and 043 (1974-76). These are physically the same internally but are calibrated differently for compatibility with their respective ECU's, which are also different.

The 914 1.7L has a single MPS, PN ending in 049. It is physically different internally and calibrated differently, from the 2.0L MPS's for compatibility with the 1.7L ECU's.
Jeff, how do us guys with 1911 motors deal with the 049 MPS issue? I have an Innovate LM-2 AFR meter, so that should help with the adjustment? (IMG:style_emoticons/default/confused24.gif)

I plan to keep the 1.7L FI components but use green 2.0L injectors. I also have a set of 1.8L injectors, but think the 2.0L will be closer than those.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 12th May 2024 - 10:21 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...