DCNF carbs
Lee.C:
Quote from: jhicken on April 01, 2008, 22:22:13 pm
Here's a shot of my '67 [circa 1977] with a 1776 sporting a pair of 42dcnf's.
Vauhn Rollings helped me set these up. Ran smooth as silk. My best time at OCIR was 15.07 and if I was light on the throttle, I could almost get 40mpg [long hiway trips]. No bullshit.
-jeffrey
Now that is a COOOOOOOL looking motor :) and 1977 is when I was born ;) :)
Zach Gomulka:
Quote from: DKK Rick on March 31, 2008, 17:41:14 pm
I have a set of those carbs along with the stacks NIB someplace... saving them for a T3 project.
I had the cast aluminium stacks but I traded them straight up for a pair of Bergs ::) Then cut them waaayy down to fit in the short aircleaners of my type 3 ;)
Jim Ratto:
One thing you might take into consideration, the DCN, DCNF carbs were originally designed to be used on Italian vee-configuration engines, nestled between the cylinder banks, with the throttle shafts oriented perpendicular to the axis of the engine's crankshaft. I believe the 40DCN was orignally utilized on the Ferrari 275GTB/4 V12 and the 42DCNF was utilzed on the Maserati/Citroen 2.7L V6 (in the SM and the Maserati Merak). All of these applications ran the throttle shafts 90 deg to the crank axis. Anyway, the floats on these carbs were designed to ride on the car as they did on the Ferrari, Citroen, etc. On a VW they are oriented 90 degrees from how they should be. I have heard from guys that have run them that you'd go into a long, fast corner and the motor would shut off, due to empty float bowls. Even the Berg catalog alludes to this problem and mentions that for off road or slalom use, the IDF is a better carburetor. A friend/customer of mine up north worked up a dry-sump float bowl system for DCNFs on his off road stuff in the mid 70's and it cured the problem and he "ate those Zenith pussies alive."
48IDAs aren't just for looks. They hold an amazing volume of fuel (I can run the car down the street on gentle throttle to the grocery store without turning my Holley pump on), they wake up VW motors that "need" them, they are easier to work on than any carburetor I've played withm, they are as simple a child's Lego set, plus they make undeniable horsepower. On the downside, they are so BIG that they make working around them a little aggrivating. But which dual carbs on a Type 1 DON'T?
Lee.C:
Quote from: Jim Ratto on April 02, 2008, 20:51:02 pm
One thing you might take into consideration, the DCN, DCNF carbs were originally designed to be used on Italian vee-configuration engines, nestled between the cylinder banks, with the throttle shafts oriented perpendicular to the axis of the engine's crankshaft. I believe the 40DCN was orignally utilized on the Ferrari 275GTB/4 V12 and the 42DCNF was utilzed on the Maserati/Citroen 2.7L V6 (in the SM and the Maserati Merak). All of these applications ran the throttle shafts 90 deg to the crank axis. Anyway, the floats on these carbs were designed to ride on the car as they did on the Ferrari, Citroen, etc. On a VW they are oriented 90 degrees from how they should be. I have heard from guys that have run them that you'd go into a long, fast corner and the motor would shut off, due to empty float bowls. Even the Berg catalog alludes to this problem and mentions that for off road or slalom use, the IDF is a better carburetor. A friend/customer of mine up north worked up a dry-sump float bowl system for DCNFs on his off road stuff in the mid 70's and it cured the problem and he "ate those Zenith pussies alive."
48IDAs aren't just for looks. They hold an amazing volume of fuel (I can run the car down the street on gentle throttle to the grocery store without turning my Holley pump on), they wake up VW motors that "need" them, they are easier to work on than any carburetor I've played withm, they are as simple a child's Lego set, plus they make undeniable horsepower. On the downside, they are so BIG that they make working around them a little aggrivating. But which dual carbs on a Type 1 DON'T?
Hey Jim I seem to remember you pointing this out before and thats why I only use ONE and it 90degs compared to the crank ;) :)
I have said it before and I will say it again - DCN's are F$%KIN AWSOME!!!!!!!!!!!! ;) :)
I'mgonna start another thread ;D
Donny B.:
I have driven with my DCNFs many times into long sweeping corners with nary a problem. Where it locks one float open and one closed my experience says it is on acceleration from a stop and making a hard turn at the same time. That is hard acceleration not just driving away. Otherwise they are the smoothest dual carb set up I have experienced. I have and have used both 42s and 44s.
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