 Weber, Carb Balance |
|
|
|
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. |
|
|
| NARP74 |
 Oct 4 2024, 05:45 PM
Post
#1
|
|
Senior Member  Group: Members Posts: 1,379 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains  |
I was starting to balance my carbs, never looked into them since I bought the car. I ran into some issues with my carbs vs the standard docs I find.
One bank reads 4.5 and 5, the other bank reads 6 and 6 with the snail. When I looked into adjusting the lower reading one, I noticed some odd looking adjustment options. I was expecting to see an air bypass, idle mixture and vacuum port on both sides. I only have it on one side. Pic below. The side missing the air bypass happens to be the lowest reading of all 4 carbs, so how do I adjust that one? Carbs are numbered, 40 IDF 42/43 4C on the base of both.   |
   |
 
|
  |
Replies
| NARP74 |
Oct 10 2024, 12:31 PM
Post
#2
|
|
Senior Member Group: Members Posts: 1,379 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
After a full refresh, not rebuild, the air and numbers are a little better.
1. 7 2. 6 3. 6 4. 7 Got the dwell dialed too. After having these completely apart, I have decided that they are too far gone for my taste. Too many odd things wrong with them that even a full rebuild would not fix. So I think I have bailed on these. I do have another engine with a different set of newer Webers that I will start messing with this winter. |
|
|
|
Posts in this topic
NARP74 Weber Oct 4 2024, 05:45 PM
Shivers Mine are 40’s but mine have the same adjustments... Oct 5 2024, 12:39 AM NARP74 I was expecting symmetry. I can't find any ot... Oct 5 2024, 08:16 AM infraredcalvin NM i read the question wrong… Oct 5 2024, 11:55 AM NARP74 I pulled one carb off and got some answers, not on... Oct 5 2024, 12:44 PM technicalninja I have a possible inexpensive route for you.
Look... Oct 5 2024, 12:54 PM NARP74 That link is to a utube vid about AFR and engine c... Oct 5 2024, 10:19 PM Superhawk996 Make sure the idle air bypass screw on the 5 bore ... Oct 5 2024, 11:07 PM
930cabman
Make sure the idle air bypass screw on the 5 bore... Oct 6 2024, 07:20 AM
MikeK
Make sure the idle air bypass screw on the 5 bore... Oct 6 2024, 11:38 AM technicalninja Updated my post to reflect CORRECT target.
You... Oct 6 2024, 11:42 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 7th July 2025 - 01:33 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.