 Air fuel ratio Ljet |
|
|
|
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. |
|
|
| Geezer914 |
 Jun 19 2022, 01:44 PM
Post
#1
|
|
Geezer914  Group: Members Posts: 1,767 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States 
 |
I am trying to adjust the air fuel ratio on me 2056 Ljet. I read the article that was posted a while back. I adjusted the wiper arm and set the idle at 1100 rpm (Raby 9550 cam) with the idle AFR at 13.2. When I check the high rpm the AFR is at 12.1. If I adjust the high rpm AFR to 13.2, (moving the large wheel 7 teeth CW) the the idle AFR is 16.9 with the mix screw all the way down. If I readjust the wiper arm to 13.2, then the high rpm AFR goes back to 12.2. Can't seem to find a happy medium. I know when you adjust the wiper arm it changes the mixture linear from idle to high rpm. How much more can I adjust the large wheel CW?
|
   |
 
|
  |
Replies
| ClayPerrine |
Jun 29 2022, 06:32 AM
Post
#2
|
|
Life's been good to me so far..... Group: Admin Posts: 15,902 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
|
I don't ever recommend changing the settings on the internals of the AFM. It is setup at the factory with a certain spring tension and requires a special Bosch tool and manual to reset it correctly. Changing it can change the fuel curve dramatically and cause crappy running.
If your AFM has been opened, I suggest you get one that has not been touched and try it. You may find the majority of your problems go away after that. Clay |
|
|
|
Posts in this topic
Geezer914 Air fuel ratio Ljet Jun 19 2022, 01:44 PM
emerygt350 Is any of this under load? Jun 19 2022, 05:08 PM Geezer914 No. The idle is going to be the idle. The only t... Jun 19 2022, 05:31 PM
emerygt350
No. The idle is going to be the idle. The only ... Jun 19 2022, 05:39 PM Mark Henry Load AFR with iron jugs should be just under 13:1,... Jun 20 2022, 09:26 AM 914werke Sounds like were on a parallel path. Following
Im ... Jun 20 2022, 12:37 PM Van B Geezer, seems to me you were fine with the values ... Jun 21 2022, 10:02 AM 914werke Hopefully the Geez is making better progress than ... Jun 23 2022, 07:48 PM Van B Hmmm… AFM screw is 3-4 turns out, correct?
What... Jun 23 2022, 08:51 PM Geezer914 If your idle is high and no change when you adjust... Jun 24 2022, 04:31 AM Geezer914 I ended up with 13.1 at 3000 rpm and 16.9 at idle.... Jun 24 2022, 04:34 AM 914werke If your idle is high and no change when you adjus... Jun 24 2022, 09:17 AM ClayPerrine
If your idle is high and no change when you adju... Jun 24 2022, 02:33 PM Van B There is no 27 degree mark for the L-Jet. I wonde... Jun 24 2022, 12:21 PM rhodyguy Something is amiss down wind of the AFM? Vac leak ... Jun 24 2022, 01:01 PM 914werke Thanks for chiming in Clay. @ClayPerrine
Ive ne... Jun 24 2022, 02:51 PM wonkipop
Thanks for chiming in Clay. [b]@[url=http://www.... Jun 24 2022, 06:25 PM Van B On last time: Does your fan have the single red pa... Jun 24 2022, 03:28 PM wonkipop
On last time: Does your fan have the single red p... Jun 24 2022, 05:08 PM wonkipop from factory manual on timing marks.
(interesting... Jun 24 2022, 05:36 PM 914werke So thanks to all who chimed in.
Sometime you get ... Jun 24 2022, 07:08 PM wonkipop good stuff.
:beer2:
good looking throttle body.... Jun 24 2022, 07:21 PM Van B Ah yeah that’ll do it. When you said TB was goo... Jun 24 2022, 07:26 PM 914werke UGH. Im back.
Well I thought I have this dicked b... Jun 28 2022, 03:44 PM wonkipop i'm probably not much help - i have an entirel... Jun 28 2022, 07:11 PM Van B
I don't ever recommend changing the settings ... Jun 29 2022, 11:28 PM 914werke I don't ever recommend changing the settings ... Jun 29 2022, 04:55 PM ClayPerrine
[quote name='ClayPerrine' post='3012025' date='Ju... Jun 30 2022, 04:59 AM Geezer914 Look up Internet Air Cooled Air Flow Meter. There... Jun 29 2022, 07:08 PM 914werke Just an FYI.. I had factory training on L-Jet ba... Jun 30 2022, 12:37 PM wonkipop
Just an FYI.. I had factory training on L-Jet b... Jun 30 2022, 06:19 PM ClayPerrine
Just an FYI.. I had factory training on L-Jet b... Jul 1 2022, 05:39 AM 914werke Rich, I apologize if I came across as admonishin... Jul 1 2022, 11:01 AM ClayPerrine
[quote name='ClayPerrine' post='3012437' date='Ju... Jul 1 2022, 01:36 PM StarBear
[quote name='ClayPerrine' post='3012437' date='J... Jul 3 2022, 06:48 AM nihil44 I have been outed by @wonkipop . I have been loit... Jul 4 2022, 06:41 PM 914werke here's what Im working with:
Jul 1 2022, 03:00 PM wonkipop thats a 75 1.8 AFM.
i believe it pairs with a 75 ... Jul 1 2022, 08:45 PM ClayPerrine
thats a 75 1.8 AFM.
i believe it pairs with a 75... Jul 2 2022, 06:24 AM wonkipop part #s / details for the L Jet components on a 91... Jul 1 2022, 09:49 PM wonkipop @914werke
some one who might be able to help wit... Jul 2 2022, 07:56 PM ClayPerrine I don't understand why you would have to ... Jul 4 2022, 08:10 PM nihil44 Clay,
I was just having a play with the Kombi AFM... Jul 4 2022, 08:32 PM wonkipop thanks for the images @nihil44
great to be able... Jul 4 2022, 08:40 PM Van B That ‘74 6 pin doesn’t look like either of min... Jul 4 2022, 11:19 PM nihil44 Apologies to the group for posting photos of what ... Jul 5 2022, 08:37 PM |
10 User(s) are reading this topic (10 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 24th November 2024 - 09:29 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.