DCNF Fix

[Eric_S]

The problem with the DCNF design is that when cornering hard, fuel spills out of the float bowl vent and drowns the air corrector jets. This totally wanks the fuel mixture ant two cylinders don't fire.

I made these vent stacks from .219 and .188 brass tubing silver soldered at 20°. I had to slightly enlarge the 5mm vent hole to accept the .219 tubing. I also had to slightly reduce the O.D. of the air corrector jet to clear the .188 stack. I then flared the end inside the float bowl so there is no possibility of it coming out. Lastly, I JB Welded it in place so there is no leakage or wiggle.

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Eric_S

What are all these extra parts?

[modok]

Nice.
I want some of those dcn's! I bet they fit in the engine compartment so much better than IDFs.

[Eric_S]

These are actually 44DCNFs (as big as they get) and are ultra-rare. They are Berg specials and have Grose ball valves. They weigh 1108g vs IDF 1437g and are .6" shorter than IDFs. They are a bit narrower too and with the square pattern they can be fit up either way. The manifolds are pretty much a straight shot too since the float bowl is beside not between, an especially nice feature in a T3. I haven't run these yet, but I'm sure it'll take way more than a 1g turn (yeah, right! Only possible on rails or wings) to over-top this float bowl vent.
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Eric_S

What are all these extra parts?

[sturgeongeneral]

Very nice modification! If only that was an availiable mod for everyone. You should be extremely happy with the results. Please post an update after you run them for a little bit.
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In honor of bowtie56jw:Another victim of the nasty "C" Praying for ya Jeff!

My exwife said if I towed home one more bug she would leave me. You know, every once in a while I miss her

[markinsd]

I was wondering how to do this modification.. Great pics.. Looks like you did a great job!

[frank1380]

Nice! I may need to do something similar on my 42s. Thanks for posting.
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You claim you have "duel" carburetors, but do they ever actually fight?

[DarthWeber]

Eric, In the Berg catalog they said their carbs were redrilled and circuited to match specific VW engine applications. Since you have the Berg 44 specials I was curious if you could see and describe any modifications they actually did.

[Joel]

[madmike]

Hey Eric,Are those the 44's you got from me?Madmike
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[67Beetle2017]

[Eric_S]

[madmike]

They Look Awesome!!!!!Here's the story on them, A So called buggy builder up here Had them hanging on the wall for a few years He know nothing about Dialing in carbs "If he can't bolt them on", out of the box and work ,He's lost I found out he actually likes the POS progressives So I swapped him two sets for those for the DCNF's And that's the rest of the story And I prefer the IDF's I'm so Glad they have a Good Home Instead of hanging on some "dipsticks" wall I really don't mean to put this guy down But he's such a BS'er mouthing off all the time and thinks dual cannons & solexes are high preformance, Selling he's crap from JC Witney to other members of our small club,I try to tell them ?? So I beet him on the Track , Madmike
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[Clatter]

I have a set of NOS 44DCNFs in a box around here somewhere.

Will look and see if they have 4 progression holes...

***Edit**** I just checked mine..
They DO have 4 progression holes, staggered just like yours.
The brass plugs to access them are just like yours.
In the same place, and probably made with the carb...

It would be cool to see what the things they did to those were.
After reading all about the mysteerious "Berg Specials" all these years.
With them not doing the Specials anymore, it wouldn't be copying something, right?

So far, its:

1. Bigger aircleaner mounting studs.
2. Nuts on the adjuster screws.
3. Grind the numbers off the side.
4. Choke block-off plates.
5. Ball-valve needle and seat

Are these going onto a type 3?
Won't the velocity stacks run afoul of the short aircleaner lid?

-So....-

What's the chance you could make me up/sell me a set of those vent stacks?
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[Eric_S]

[Clatter]

So they are still doing the specials!

Clyde, or GBE?
What that set you back?

[Eric_S]

GBE in Orange. It was about $405 shipped cause I needed some parts. The needle screws that have the nuts on them were bent and a couple other odds and ends.
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Eric_S

What are all these extra parts?

[Brent]

Bringing this one back from the dead.

I've done the bowl vent mod to a couple of these now and took pictures all along. Thought I'd put them up.

Here goes. I'm starting with 44's here. The vent hole is a little bigger, so I used two sizes of tubing. Larger one for the hole, and the next size smaller for the stack. Doing it this way there is no need to shave the air correctors down. I also get the right size drill bits for use later.

I'd say the angle were looking for here is about 135*. I keep the tubes long, then just grind them on the bench grinder until they fit right. After that I clean them up with a drill and a little emory cloth.

Next, I mock them up using some brake cleaner lids and a bit of flux on the ends.

And solder them.

Now cut them a bit shorter with a Dremel cut off wheel. We want them a little long and will trim later. Very carefully run the bits through both sides to clean out any solder on the inside. You can see what came out. Blow through it and check the seal by blowing with a finger over the other end too.

And then clean up any remaining flux that's burnt. I just used a green scrubby pad.

Then test fit and cut the bowl side a little shorter, but you still want it to be a bit long on the inside to cut later.

This ridge need to be shaved down a little. A little grinding stone on a Dremel works great.

And final test fit.

Just a little JB weld under the stack, along the sides, and around the bowl penetration. I like to use a toothpick and swirl it on to work out any air bubbles. Some tape to hold it overnight for JB to cure.

Next morning we're here. The stack is still to long, so cut it down. These particular carbs are going to be uses with rather thin air cleaners so it needed to be short enough to fit under there; for use in a Type 3, woot!

The inside will look like this. We need to trim it down with that cutoff wheel.

And finally a bit of JB applied the same way to the inside.

I put a little silver Masterseries over the inside, but it's probably not necessary. And that's it.
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[luckystiff]

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[flyinglow94]

Great wright up I have some 40's, 42's and 44's I am going to be modding something like this in the future.
But it is curious that for the Berg mod that they didnt grind off the stamping of the 44 dcnf from the float casting.
I had sold a set of 42's back to Dee in the mid 90's at the classics and they had all the mods described above.

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[Brent]

One mod that hasn't been mentioned is cutting off of the pointy nubs next to the mixture screws.

When I put the carbs back together, I'll post more pictures of the modifications. They'll be the [almost] Berg specials.
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