Starting my engine on a stand, issues arose |
|
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. |
|
Starting my engine on a stand, issues arose |
malcolm2 |
Sep 29 2020, 06:16 AM
Post
#41
|
Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
I have built a fresh 2.0 and borrowed a set of weber 40s to get her running, broken-in etc....
I bought a new single vacuum distributor with the flame thrower 3 module inside. Also bought the Petronix coil. I built up oil pressure, then connected the gas lines, fuel pump, and coil. Tach and timing light too. After a few tries, she started. As expected running very ruff. Back-firing thru the carbs. I loosened the distributor and tried to make some adjustments. That seemed to help the back-firing a bit, but not totally. I got the idle timing to what looks like 7 btdc, but it is tuff to work everything without a helper. I know next to nothing about these carbs, and about the same amount to tune them enough to bench run the engine, but I am looking into that. Any help would be appreciated on the carbs. I got it idling, again, very ruff. So I wanted to do the cam break in, so I rev'd it up to about 3000 and held there. Maybe a minute and the revs dropped and I had to putz with the accelerator to keep her going. Again up to 3000, same thing revs dropped. I have a note in to my distributor vendor about how this "rev limiter" on this module works. So three things here. She is still running ruff, back-firing etc...and there is the high rev cut-off. Lastly the carbs, any quick checks or adjustments there? Any thoughts or suggestions? |
nditiz1 |
Oct 1 2020, 11:23 AM
Post
#42
|
Senior Member Group: Members Posts: 1,191 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region |
What size engine are those on? @ndfrigi
220 Air 145 Main - this is a little rich for a 2.0 50/55 idles will be good, I can't tell which you have For anyone interested in the tuning of carbs especially for a type 4 engine. I found this guy on youtube and while he is using knock off carbs (Weber IDF clones) his testing and methods on setting the floats, jetting, and setting up the carbs is pretty sound. youtube channel - Motor7710 |
ndfrigi |
Oct 1 2020, 12:19 PM
Post
#43
|
Advanced Member Group: Members Posts: 2,933 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California |
What size engine are those on? @ndfrigi 220 Air 145 Main - this is a little rich for a 2.0 50/55 idles will be good, I can't tell which you have For anyone interested in the tuning of carbs especially for a type 4 engine. I found this guy on youtube and while he is using knock off carbs (Weber IDF clones) his testing and methods on setting the floats, jetting, and setting up the carbs is pretty sound. youtube channel - Motor7710 sorry @malcolm to get into your thread. @nditiz1 thank you for your concern on my set up. I believed my engine is a 2056 based on my good friend who gave me this engine (one of our best member here) that he just acquired from someone. After adjusting the valves. I have 150 +/- 1 compressions now on cold engine. I have 50 idle jet and145 main jet, maybe that is why the mix idle screw is way back out to add more air? (from set up before I dismantled it). Didn’t test run the engine yet after cleaning my carbs. |
Lo-Fi Version | Time is now: 10th June 2024 - 03:01 AM |
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 ... |