new webers, no cold start circuit... why "block off" plate?

[modok]

So a lot of these NEW webers the cold start cirtcuit is left off, not machined, so... nothing under the cover far as I know, right?
so no reason to have a block off plate right?
Or am I remembering wrong?


If it's just cosmetic then I'd throw that cover right out. Less parts to fail.

[modok]

Maybe found the answer, holes UP still rough cast-in, so unfiltered air leak to the top.
Silly thing anyway.
They should fix that.

[oprn]

I would love to see some company finish the job and make the cold start circuit function as Weber intended. It is truly a deluxe system and is very tunable, more so than any other choke system I have used before. After using and understanding this setup the old butterfly on the top of the carb is just short of stone age in the carb development linage.

This would open up a whole new realm of possibility for those of us that live in cooler climates for a year around carb.

It will never happen though for three reasons. First and foremost is the lion's share of the market is in hot climates. Second is that the 1/4 mile guys in southern California have soured the minds of performance minded people against these systems and I personally doubt that mindset/mentality will ever change. The third reason is that it would increase the cost of the carbs noticeably and cheaper is always better... right?

But... wouldn't it be nice to have that option?
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Our cars get old, we get old but driving an old VW never gets old!

[Dale M.]

Actually the new IDF clones out of China (EMPI) don't even have block off plates, internal passages are non existent at time of casting...

_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[Lingwendil]

Maybe on the newer HPMX carbs, but on the generic IDF clones I picked up from CIP1 they have the plates and look to be correctly machined underneath, even come with plungers installed. If the choke parts wouldn't foul the stock doghouse shroud I'd be interested in sourcing a set and trying them out, sounds like a nice setup for really cold weather. As it is the stock shroud required slight denting to fit the carbs, and since I have maybe four more stock shrouds I'm not in a hurry to swap to an aftermarket 36 horse setup anytime soon, or to pull the carbs to beat on the one on the car any more

Maybe when I chop one up to make a Frankenstein Salzburg shroud out of one
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73 super beetle thread http://www.thesamba.com/vw/forum/viewtopic.php?t=649622 Back on the Road!

Modify your Kadrons for SVDA http://www.thesamba.com/vw/forum/viewtopic.php?p=8115884#8115884

Cast iron VJU4BR8 SVDA reference thread- https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

Need replacement filters for original Kadron aircleaners? WIX #42087 is a perfect fit, as is Napa Gold #2087!

[oprn]

[cjsuner]

Any instructions or anything on how you would tune this carb within a carb, Oprn? I haven't heard of it, or seen an example.
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71 Super Convertible (Orange)
74 Standard Beetle (Light Blue)

[oprn]

I don't recall if tuning is in the Weber manual but how it operates is. When I find my manual again I will check.

Mine worked pretty well as jetted with the exception of when it gets below -20*. Then they don't supply quite enough fuel. I haven't addressed that yet as I don't run an open Buggy much when it's that cold but I will try larger jets one of these winters. My feeling is that you change the fuel jet until there is enough fuel to start the engine on your coldest day. Then the air correction jet/emulsion tube sets the balance between RPM and mixture as you gradually push the choke knob in keeping the mixture rich enough to transition without hesitation without an excessively high idle. In other words I believe the correction jets/emulsion tube maintain the proper fuel/air balance over the range of the choke plunger stroke.

I did find this on YouTube. His problem was too much fuel, the opposite of mine. And by the way the DCOE has the exact same cold start system as the IDF. Pay special attention to what he has to say at the end.
https://www.bing.com/videos/search?q=Weber+carbure...6ghacc%3D0

This is what it looks like on the outside of the carb. Most carbs have a block off plate instead of this mechanism. Those are the plates Modoc was talking about.

_________________
Our cars get old, we get old but driving an old VW never gets old!

[Dale M.]

Technically this is not a "choke" its only a fuel enrichment circuit to supply a richer fuel mixture during warmup...
_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[modok]

The Alfa webs or model78/79 takes the air from outside, through a screen.
While the more common ones get the air from the top I think.
And there are different covers to let the cable go forward or back.
So really there are quite a few different variants. All makes sense when you look at it but hard to remember at any given moment they all blend together.
Not to mention dellortos

[RalphWiggam]

You can still buy the choke assemblies if you want to try it out.

Problem is you have to run a long cable to your cab to operate them.

[modok]

If you dislike long cables I've got bad news for you. Look in the tunnel

[Lingwendil]

Easy enough with a throttle cable and some brake line.
_________________
73 super beetle thread http://www.thesamba.com/vw/forum/viewtopic.php?t=649622 Back on the Road!

Modify your Kadrons for SVDA http://www.thesamba.com/vw/forum/viewtopic.php?p=8115884#8115884

Cast iron VJU4BR8 SVDA reference thread- https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

Need replacement filters for original Kadron aircleaners? WIX #42087 is a perfect fit, as is Napa Gold #2087!

[oprn]

I used a throttle cable assembly for a lawn mower complete with a lever and mounted it on the center tunnel beside the gear shift.

One fellow on here (I forget his handle but he was from Europe) did it electrically. He used 2 model airplane servos and wired them to a circuit/control box he made (He shared the schematics here) and mounted it on his dash. While you are in the model hobby shop getting your servos you could buy a servo tester to do the same job. Mine has 2 outlets and will run 2 servos at the same time in unison.

As for front/rear pull mechanisms, you just swap them side to side. One way gives front pull, the other rear pull.
_________________
Our cars get old, we get old but driving an old VW never gets old!

[scottydub]

Has anyone ever tried putting a sock over the air filters while leaving some of it exposed, to “choke” the amount of air until it warms up?

[oprn]

I have not as my cold start functions well. I did however try something similar on the air intake to the fan before I had enough parts collected to put the thermostat back in operation. I had a screen over the air intake so I threw a rag over it to block the air for warm up. It worked great... until it needed some cooling. Then I pulled the rag off and the engine got too cold and started to stumble and fart. Put the rag back on to partially block the air, kind of worked again until it didn't.

In short I spent the day trying to adjust the air flow with the rag changing is as load and ambient temperature varied.

I suspect your idea would work... sort of but involve the same sort of chase, just for a shorter time. You would need to be there to roll the socks up as the fuel requirement lessened. I think it would take two people. One to run the starter and throttle and one to man the socks.
_________________
Our cars get old, we get old but driving an old VW never gets old!