 Weber Jet Sizes?, Is there a "ballpark" starting point? |
|
|
|
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. |
|
|
| Porsche Rescue |
 Jul 4 2003, 01:48 PM
Post
#1
|
|
Saving and Enjoying Old Porsches  Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None  |
Can someone tell me the proper jet/emulsion tube sizes for Weber 40's on a near stock 2.0 (has "carb" cam but don't know specs)? So far I have only checked the idle jets and they are 45's. The engine runs OK but I think it could be better. There is a bit of a stumble at slack throttle around 3000 rpm. I think that is about the point of transition from idle circuit to main circuit. Any suggestions out there?
|
   |
 
|
  |
Replies
| Porsche Rescue |
Jul 4 2003, 05:34 PM
Post
#2
|
|
Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
28 mm venturis. Guess I better tell the whole story.
I decided to use the carbs which came with a broken 1.7 high compression race motor which came with my car, instead of the new, never used Webers which came with the fresh (19 year old) completely rebuilt 2.0 which is now in the car (confused?). I just looked at the new carbs. They have 36 mm venturis, 50 idle jets. Carbs on the car are 32 v's with 45 idle jets. Haven't yet looked at the other jets/tubes. Can't believe there can be that much difference in venturi size in 40 idf's used on 914 engines, 1.7 or 2.0. The throttle plates in the ones with the 36's look huge compared with the 28's. Car runs pretty well but maybe I shouldn't be using carbs from a 1.7 racer rather than the ones which came with my new 2.0. Tell me more! |
|
|
|
Posts in this topic
Porsche Rescue Weber Jet Sizes? Jul 4 2003, 01:48 PM
krk Jim,
I have zero experience w/webers on 4 cyl... Jul 4 2003, 02:41 PM maf914 Jim,
What is the venturi size? 28 or 32?
Mike Jul 4 2003, 04:28 PM maf914 On my 2.0L (mild cam, ported heads) with 40 IDFs I... Jul 5 2003, 05:38 AM rhodyguy jim, this can be exhausting. go to www.germanlookf... Jul 5 2003, 07:30 AM Porsche Rescue I am using 050 distributor. From the looks of the ... Jul 5 2003, 08:58 AM maf914 I would bet that on a street stock 2.0L 36mm vents... Jul 5 2003, 09:41 AM
HarveyH I have a 74 2056 with a Pertronix and Crane Hi-6 i... Jul 5 2003, 11:18 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 11:53 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.