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A/C and dual carbs?

FM Former Member

I have a 2000 VS with A/C (that I want to keep) and a single PICT34 carb, but I am thinking about a switch to a dual carb system. The engine is a stock 1776.

I have some questions for you:

- How many of you have A/C and dual carbs?

- Which carbs do you have?

- Which carbs would you suggest? (I read somewhere that Kadrons are easier to maintain than Webers, but that their linkage is not a very good solution. I am looking for something that is as low on maintenance as the single carb that I have)

- Which size would you suggest? (I don't want something that will kill the stock engine/transmission without other modifications)

- Can the change to a dual carb system be done without removing the engine?


Thanks for your suggestions!

Andreas


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FM Former Member

I have a 2000 VS with A/C (that I want to keep) and a single PICT34 carb, but I am thinking about a switch to a dual carb system. The engine is a stock 1776.

I have some questions for you:

- How many of you have A/C and dual carbs?

- Which carbs do you have?

- Which carbs would you suggest? (I read somewhere that Kadrons are easier to maintain than Webers, but that their linkage is not a very good solution. I am looking for something that is as low on maintenance as the single carb that I have)

- Which size would you suggest? (I don't want something that will kill the stock engine/transmission without other modifications)

- Can the change to a dual carb system be done without removing the engine?


Thanks for your suggestions!

Andreas


FM Former Member
Nothing will be as easy to maintain as the single carb, but having said that a good high performance VW mechanic won't have any problem working on the dual carb setup.........you will lose some gas mileage and I'm not sure if you will really see that much difference in performance? I'm sure you will get some more responses to that part of the question. I'm currently running Weber IDF 44's on a 2054cc engine.
D DavesD
Steven,

Dual carbs don't necessarily get poorer mileage, If a carb is only feeding one cylinder, you have complete control of tunability since you can adjust the air/fuel mixture perfectly for each cylinder. Carb throats that feed multiple cylinders (the case in stock engines) have to be adjusted to a compromise setting, and the result is that all the fed cylinders may run at a less than optimal air/fuel mixture. This is one reason why dual carbs provide better mileage than centermounted carb kits (including stock) assuming they are driven similarly.
FM Former Member
David,

Thank you for bringing that up. I have seen ads about dual carb kits and one of their points is always an increase of gas mileage, maybe not much though and only if the carbs are setup correctly.

Someone else having A/C in a dual carb setup?
I guess I leave everything as it is - the car is running great. I drove it the first time this year and got my state inspection done :-)


Andreas


FM Former Member
Although I dont feel A/C should ever be installed on a air cooled engine, I have been talked into putting it on some. It can be done very easy using dual carbs. The compressor needs to rotate a little. The cross bar for the linkage needs to be raised and the compressor will have to be shimmed away from the shroud about a half inch. In all it is about a 3 hour job getting it all set up right.

Pat Downs
Alan MerklinAlan MerklinDrclock - Elkins, West Virginia Supporting Member
A proven point of interest .... I ran a set of dual Dellorto's on a mild built Type 1 1914 cc motor est. 110 HP and got a constant 30 mpg . When I decided to sell the kit car, I pulled the motor and installed a nearly stock 1600 cc 65HP type 1 that had a lightened flywheel, 1:25 to 1 rockers, a mild port on the heads w/ Bosch 009 distributor and a Weber progressive 2 bbl. That combo got 23 mpg. The bigger motor didn't have to work nearly as hard to push the vehicle weight as did the stock motor and the dual dells on the larger motor as mentioned in an above post feeds the individule cylinders.
Alan
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