 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
| HarveyH |
Jul 5 2003, 11:18 AM
Post
#2
|
|
Member Group: Members Posts: 450 Joined: 19-June 03 From: Downingtown, PA Member No.: 843 |
I have a 74 2056 with a Pertronix and Crane Hi-6 ignition and 40IDF's. I'm running 28 mm venturies, 0.45 Idle's, 120 Mains, 200 Air Correction's and F11 Emulsion Tubes. Remember, the idle jet also controls most of your low to mid range mixture. The mixture at static idle is adjusted by the mixture screws and almost any jet will give you an acceptable static idle. As you come off idle and run up to 2800-3000 RPM the idle jet feeds the transition circuit and this is where the jet size selection comes into play.
When I was first researching the car, I checked with several Weber parts houses, and they all said to get a multi-spark CD igintion before starting to adjust jet sizes. Harvey |
|
|
|
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 Porsche Rescue 28 mm venturis. Guess I better tell the whole stor... Jul 4 2003, 05:34 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
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 8th June 2024 - 11:10 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.