Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

> Reviving NOS Webers, Initial Settings?
bbrock
post Mar 20 2019, 08:55 PM
Post #1


914 Guru
*****

Group: Members
Posts: 5,269
Joined: 17-February 17
From: Montana
Member No.: 20,845
Region Association: Rocky Mountains



I didn't want to hijack the other thread but have a question about my own Webers. They are Italian 40IDFs I bought in the late 80s or early 90s. Other than finger tight bolting them on to my engine to see how cool they looked, they have never been used. No fuel has touched them. I don't remember if I even opened them to set the float levels. BUT... they were stored in a humid basement for several years before I moved to a civilized climate. So, the magnesium housing is tarnished on the outside and the plating has deteriorated on a few of the levers and such. Pretty minor stuff from what I can see.

My question: is there is anything special I should do or check other than inspecting for corroded parts and normal setup as I prep these for service?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
tmessenger
post Mar 21 2019, 07:53 AM
Post #2


Member
**

Group: Members
Posts: 70
Joined: 6-December 18
From: Iowa
Member No.: 22,707
Region Association: Upper MidWest



The float needle tip can harden with age so I replace those along with pump diaphragms. Check your fuel pressure you'll want 3 ~ 3.5 psi.

Your 40 IDF's may have come with 28mm venturi, this is fine for a stock 1.7 or 1.8 if you have a 2L I would recommend 32mm venturi.

Note: The vintage IDF's are not drilled for port vacuum, they have manifold vacuum only (the vacuum port is below the throttle plate). Depending on which distributor you are running you may or may not be fine with a lot of vacuum advance at idle?

I wanted my vacuum advance to drop out at idle so I set up an electric vacuum switch and control it with a micro switch on the carb linkage.

Tim

User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
bbrock   Reviving NOS Webers   Mar 20 2019, 08:55 PM
914_7T3   Are you really going to go through with it? After...   Mar 20 2019, 09:47 PM
bbrock   Are you really going to go through with it? Afte...   Mar 21 2019, 08:13 AM
MarkV   If nothing else I would take them apart and do a t...   Mar 20 2019, 10:07 PM
Mark Henry   :agree: take them apart, clean, blow out*, etc. C...   Mar 21 2019, 05:57 AM
rgalla9146   :agree: take them apart, clean, blow out*, etc. ...   Mar 21 2019, 06:04 AM
Superhawk996   Be brave. Put on and see what they do. If store...   Mar 21 2019, 07:45 AM
tmessenger   The float needle tip can harden with age so I repl...   Mar 21 2019, 07:53 AM
Superhawk996   Just to add a little more context. My car had b...   Mar 21 2019, 07:56 AM
Superhawk996   Not trying to start a :stromberg: storm but I do...   Mar 21 2019, 08:04 AM
tmessenger   Here's a photo of the needle that came out of ...   Mar 21 2019, 09:15 AM
dr914@autoatlanta.com   Richard at PMO is a great sounding board for any w...   Mar 21 2019, 09:28 AM
bbrock   The float needle tip can harden with age so I rep...   Mar 21 2019, 08:21 AM
Superhawk996   :worship: I learned something. Thank you. My...   Mar 21 2019, 09:37 AM
Chi-town   You'll want to replace all the original rubber...   Mar 21 2019, 09:55 AM
MarkV   If you are putting them on a fresh engine with fre...   Mar 21 2019, 08:13 PM
Superhawk996   If you are putting them on a fresh engine with fr...   Mar 22 2019, 10:13 AM
bbrock   Bottom line: Brent is fastidious and his attenti...   Mar 22 2019, 11:46 AM
Superhawk996   :unsure: Wow. I'm looking for the eating c...   Mar 22 2019, 12:34 PM
bbrock   :unsure: Wow. I'm looking for the eating ...   Mar 22 2019, 12:42 PM
timothy_nd28   :unsure: Wow. I'm looking for the eating...   Mar 22 2019, 02:33 PM
bbrock   Basement walls sweating is not a good thing at al...   Mar 22 2019, 03:00 PM
porschetub   :unsure: Wow. I'm looking for the eating ...   Sep 6 2020, 02:17 AM
Superhawk996   How about this one I got :owned:   Mar 22 2019, 12:37 PM
Tdskip   How about this one I got :owned: Nah - your as...   Jun 20 2019, 07:18 AM
mepstein   How about this one I got :owned: Nah - your a...   Jun 20 2019, 07:35 AM
johnhora   Brent, Those are in good shape for the age and am...   Mar 22 2019, 12:40 PM
bbrock   Brent, Those are in good shape for the age and a...   Mar 22 2019, 12:50 PM
Superhawk996   I'm in Detroit and we get lots of humidity but...   Mar 22 2019, 12:50 PM
johnhora   Pierce Manifold is very good as are others.. https...   Mar 22 2019, 01:08 PM
MarkV   My DRLA 40's have some of that white staining ...   Mar 22 2019, 02:07 PM
bbrock   Not sure why they came with 28's.... they mig...   Mar 22 2019, 02:23 PM
MarkV   Not sure why they came with 28's.... they mi...   Mar 22 2019, 02:44 PM
rhodyguy   As noted, the 40s would have come with 28mm Ventur...   Mar 23 2019, 08:15 AM
bbrock   More good info guys. I appreciate it. This is ma...   Mar 23 2019, 08:36 AM
Superhawk996   Back in the day (meaning when I was younger and le...   Mar 23 2019, 09:30 AM
porschetub   28mm vents will work fine,they will offer a great ...   Mar 23 2019, 02:59 PM
bbrock   I finally got around to this project. I have the ...   May 21 2019, 08:22 PM
mepstein   If you send them to me, I'll vapor blast them ...   May 21 2019, 09:08 PM
bbrock   If you send them to me, I'll vapor blast them...   May 22 2019, 07:26 AM
72hardtop   At your altitude stay with the 28mm vent size comb...   May 30 2019, 02:42 PM
bbrock   At your altitude stay with the 28mm vent size com...   May 31 2019, 09:13 AM
porschetub   At your altitude stay with the 28mm vent size com...   Jun 1 2019, 12:24 AM
bbrock   Carbs are finally cleaned up and back together. T...   Jun 19 2019, 10:18 AM
rhodyguy   Get the CB Weber manual. 2056? Refresh my memory. ...   Jun 19 2019, 10:55 AM
bbrock   Get the CB Weber manual. 2056? Refresh my memory....   Jun 19 2019, 11:11 AM
rhodyguy   OK, the 28s should be fine. A little short on the ...   Jun 19 2019, 11:19 AM
IronHillRestorations   Here's my carb tuning procedure from a March 0...   Jun 20 2019, 06:53 AM
ThePaintedMan   Nice job. :headbanger: Highly recommend you spra...   Jun 20 2019, 02:23 PM
bbrock   Nice job. :headbanger: Highly recommend you spr...   Jun 20 2019, 02:34 PM
72hardtop   What elevation you at? (My jetting is a few hundre...   Sep 6 2020, 01:26 AM
IronHillRestorations   I went back and re-read some of this thread. I...   Sep 6 2020, 11:50 AM
bbrock   I went back and re-read some of this thread. I...   Nov 22 2020, 07:13 PM
bbrock   I was surprised to see this old thread pop up agai...   Sep 6 2020, 12:17 PM
72hardtop   My procedure.... Start and warm up the engine. Ma...   Nov 2 2020, 06:19 AM
Gint   I've had this thread open in a browser tab on ...   Nov 21 2020, 09:09 AM
nditiz1   I haven't ever converted them to disabled as t...   Nov 22 2020, 08:10 PM
bbrock   I haven't ever converted them to disabled as ...   Nov 22 2020, 08:26 PM
914werke   Interesting, I happen to be working on a customers...   Aug 19 2021, 02:23 PM
IronHillRestorations   Interesting, I happen to be working on a customer...   Aug 20 2021, 04:47 AM
914werke   If they were mine I might take this approach, but ...   Aug 20 2021, 07:52 AM
IronHillRestorations   I've never seen the cold start enrichment used...   Aug 20 2021, 12:18 PM
914werke   I've never seen the cold start enrichment use...   Aug 21 2021, 11:58 AM
bbrock   At one point I had plans to add a 914-6 throttle l...   Aug 21 2021, 12:05 PM


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 28th March 2024 - 12:56 PM