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NOS,webers 40 DCNF ?
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APPLEGREENVW
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PostPosted: Thu May 31, 2018 6:35 pm    Post subject: NOS,webers 40 DCNF ? Reply with quote

I have a chance to buy a pair of NOS italian 40 DCNF Webers without intakes or linkage? What do you think they're worth? Is it worth buying?
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PostPosted: Thu May 31, 2018 6:59 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

If they are a good match to the engine that they are used on, than sure get them if the price is good.

Dan
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PostPosted: Thu May 31, 2018 8:09 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

These are good carbs. I've used a single 40DCNF on my 1835cc engine since back in 1976 !!!
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PostPosted: Sat Jun 02, 2018 12:09 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

The cost of new Gene Berg intake manifolds & linkage kit,air cleaners kit,jets,etc. adds up to the cost of new Webers 40 IDF kit.
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PostPosted: Sat Jun 02, 2018 12:17 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

You can buy most of the needed parts on the classifieds for cheap. Dan
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PostPosted: Sat Jun 02, 2018 12:47 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

Dan Ruddock wrote:
You can buy most of the needed parts on the classifieds for cheap. Dan


Where in the classifieds do you see cheap parts for DCNF?
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PostPosted: Sat Jun 02, 2018 5:41 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

Like, right here, using the search "DCNF" in all categories...
https://www.thesamba.com/vw/classifieds/detail.php?id=2179511
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PostPosted: Sun Jun 03, 2018 1:44 am    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

It depends on which style DCNF you are looking at, there are many differentiations. I am running the DCNFs from a Ferrari 308. You absolutely must run velocity stacks with this model.

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See the step in the throat, this is where the factory air cleaner base centers in the carb, and this base has built in velocity stacks.

However, if you get the universal model.

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They came pre setup.

Also, the absolute best place to get any parts, AND free expert advice is

https://www.piercemanifolds.com/
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PostPosted: Sun Jun 03, 2018 6:50 am    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

Yes,the universal models is the ones I have a chance to buy.
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PostPosted: Sun Jun 03, 2018 7:40 am    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

Anyone here know how to set up a cable and use the "fuel enrichment" lever? I haven't had that connected in the 42 years with my single 40DCNF.
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PostPosted: Sun Jun 03, 2018 8:30 am    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

APPLEGREENVW wrote:
Dan Ruddock wrote:
You can buy most of the needed parts on the classifieds for cheap. Dan


Where in the classifieds do you see cheap parts for DCNF?


These are not cheap because they have become collectable and are very cool.
Probably still cheaper than the berg stuff but will hold their value better as they are rare. The price is in line for what this rare stuff usually goes for. The old Italian stuff is just higher quality than the new Spanish carbs. I see in the pic that they are missing a couple of the ball ends and one of the arms, I have the ball ends and berg has the arms.

I ran these same parts on my 1956cc with 42dcnf's back in late 70s and are still my favorites parts for running dcnf's. Sometimes you have to be patient for what you want or need to show up on the classifieds. Are you in a hurry?

https://www.thesamba.com/vw/classifieds/detail.php?id=2013185



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PostPosted: Sun Jun 03, 2018 1:54 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

Here is my setup. It's a 2 liter Type 4 engine with air conditioning that I put in my Squareback. At first I could never get it to run right. Also, notice the shorty air cleaners, the elements were destroyed after my first road trip. I had so much fuel standoff, that it saturated the elements, then sucked pieces into the engine (CB brand)

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After a lot of research, I discovered what I really had (the 308 model). I then modified a set of Pierce Manifolds stacks (they were too tall for my engine compartment), went to a taller air cleaner, and with some jetting advice from Pierce's, this car is a dream to drive.

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If you can get the carbs at a decent price, jump on them. I am also serious about Pierce Manifolds. They have far more replacement parts, then Redline, or any carb company I have ever dealt with. They are also extremely knowledgeable and helpful. At one point, I was on the phone with them for almost an hour sorting things out.
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PostPosted: Sun Jun 03, 2018 2:13 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

These will help you get a cheap start.

https://www.thesamba.com/vw/classifieds/detail.php?id=2125752

Beware of this style, they are not Berg. Notice the step in the top of the throat.

https://www.thesamba.com/vw/classifieds/detail.php?id=1710056

With this type you would either have to add velocity stacks, or buy these.

https://www.thesamba.com/vw/classifieds/detail.php?id=2060872

These are similar and serve the same function as the 308 air cleaner bases I mentioned earlier.
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PostPosted: Sun Jun 03, 2018 2:19 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

APPLEGREENVW wrote:
I have a chance to buy a pair of NOS italian 40 DCNF Webers without intakes or linkage? What do you think they're worth? Is it worth buying?


Just my opinion. The value of a NOS set of DCNF's isn't going to be any more than a new set of Spanish IDF's. There are a lot fewer choices for manifolds, linkage, and air filters than for IDF's and the prices will be higher. You will have a much easier time finding jets for the IDF's. In the end the DCNF's are not any better than the IDF's so you'll end up spending more money messing with them and not have any better performance. I don't see the DCNF's being worth any more in the future then they are today.
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PostPosted: Sun Jun 03, 2018 2:46 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

vwracerdave wrote:
APPLEGREENVW wrote:
I have a chance to buy a pair of NOS italian 40 DCNF Webers without intakes or linkage? What do you think they're worth? Is it worth buying?


There are a lot fewer choices for manifolds, linkage, and air filters than for IDF's and the prices will be higher. You will have a much easier time finding jets for the IDF's.


You are correct on the manifolds, but on my setup, the linkage was IDF, that just needed a little tweaking. The air filters were IDF. As far as jets and prices. Pierce Manifolds has just about any part that you need, and the price is the same as the IDFs. The only part that Pierce Manifolds does not have is different accelerator pump cams. However, in most case the cam is the correct profile, and the pump squirt can be tweaked through jetting.

Is there a difference performance wise, never dynoed an engine to find out. However, the compactness of the DCNF, makes fitment so much easier (especially in my case). Plus you have the cool factor.
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Dan Ruddock
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PostPosted: Sun Jun 03, 2018 3:03 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

The dcnf will tolerate a 34mm vent better, the throat is bigger on the inlet side. Most likely a better flowing carb.
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PostPosted: Sun Jun 03, 2018 3:52 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

I agree with Dan that the parts are not necessarily expensive.
They are rare enough, like some of the carburetors I prefer, that the laws of supply and demand just don't really work anymore. There is almost no supply, and almost no demand. So you CAN get them for cheap, if you WAIT for somebody to sell.

Personally I am LESS interested in the DCNF because they don't tolerate g-forces as well as an IDF, but that is really the only drawback I can see.
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PostPosted: Sun Jun 03, 2018 3:59 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

modok wrote:

Personally I am LESS interested in the DCNF because they don't tolerate g-forces as well as an IDF, but that is really the only drawback I can see.


Defiantly not a good autocross carb.
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PostPosted: Tue Jun 05, 2018 5:43 pm    Post subject: Re: NOS,webers 40 DCNF ? Reply with quote

vwracerdave wrote:
APPLEGREENVW wrote:
I have a chance to buy a pair of NOS italian 40 DCNF Webers without intakes or linkage? What do you think they're worth? Is it worth buying?


Just my opinion. The value of a NOS set of DCNF's isn't going to be any more than a new set of Spanish IDF's. There are a lot fewer choices for manifolds, linkage, and air filters than for IDF's and the prices will be higher. You will have a much easier time finding jets for the IDF's. In the end the DCNF's are not any better than the IDF's so you'll end up spending more money messing with them and not have any better performance. I don't see the DCNF's being worth any more in the future then they are today.


You're right.Thanks
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