MPS rebuild, mission accomplished |
|
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. |
|
MPS rebuild, mission accomplished |
emerygt350 |
Oct 27 2021, 12:07 PM
Post
#1
|
Advanced Member Group: Members Posts: 2,411 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
I just used Chris Foley's excellent rebuild kit on my leaky MPS. After removing the spider webs and varnish it all went together nicely. Chris gave me some great tips on getting an initial set. I think it is there but I don't have any experience with how a well tuned djet 2.0 914 should run. I suspect there is probably 150k or so on this engine although it could be lower, I doubt higher unless it was cared for very very well. Impossible to know with the dead odometer. Compression is great on all cylinders with no variability.
I took a little video of a drive, start up, corners, and two pulls to 60 (of various quality). After the first 40 seconds I opened my sliding rear window so you can hear the engine sounds better. https://youtu.be/Fi4vFCWhlCw |
BeatNavy |
Oct 28 2021, 03:17 PM
Post
#2
|
Certified Professional Scapegoat Group: Members Posts: 2,933 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
I was chasing my tail on inductance readings with my cheap meter. I finally got ahold of an unmolested 043 MPS and used that as my baseline by which to measure the other MPS's I had to adjust. You need to take Anders' absolute numbers with a grain of salt. The slope across the range is probably more relevant. You also need to use several inputs as clues about how you're running as applicable and available: O2 sensor (if you have one), dyno, butt dyno, plugs, exhaust smell, head temps, tailpipe, etc. etc.
If one does use an O2 sensor, I recommend running a "tee" vacuum hose off the MPS hose and attach it to a vacuum gauge in the cabin. That way you can see what vacuum you're actually drawing under what driving conditions. Many people are confused about what "part load" may mean (I think I was). Anyway, it's a good learning experience if you don't already know. |
Lo-Fi Version | Time is now: 28th September 2024 - 05:12 PM |
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 ... |