can this be done? and does it improve that much?do you have to make up your own linkages? these vs twin dellortos vs duel throat webber? come on carb specialists....this ones for you!!!!!
cheers josh
Craig Torrens6 times Australian, 7 times State Hillclimb Class Champion
Like everything with motors, it is all about combination!
More info about the motor would be nice 🙂
what works well for a 1600cc may not for a 2000cc etc
Twin carb Kombis have a slightly more complicated setup than just two separate carbs on two separate manifolds, like you would do with Webers or Kadrons.
There is an extensive balancing system mounted above the crankcase, below the air cleaner, and there are several more balancing circuits that work through the stock VW air cleaner. It works so well that if you disconnect anything with the motor running, it usually stalls.
There are in fact three separate idle circuits that all have to be synchronised on both carbs. And for primary idle and mixture settings, the LEFT carb actually controls the RIGHT - you only adjust one of them and VW's balancing system does the rest. It's a very reliable system. Once you set it up, it stays in tune (try that with Webers or Kadrons)
Now VW designed the venturis and jets for the characteristics of the Type 4 engine, an enormously strong, slow-revving, low compression engine of either 1.7, 1.8 or 2.0 litres. VW changed the jets and pumps and even the butterflies for the three different sized engines.
You probably could bolt Kombi carbs onto your 1640, get the stock balance systems working and wire up the two or three solenoids on each. But would the carbs, designed for low speed Kombis, suit the characteristics of your 1640, a small engine with an improved cam, more RPM and different power/torque curve from Kombis? Doubt it.
Stick with twin Kadrons, or Webers if you can afford them. They are more suited to what you want.
Forgot to mention - stock VW Kombi twin carb linkage is also far better quality than any aftermarket twin carb linkage. It has dual internal spring and cups to take out lateral slop, well-designed locating arms that attach directly to the Solex PDSIT carbs, quality LARGE ball and sockets on each joint, and vernier adjusters on each locating link.
You could probably get it to fit a Type 3 (but they have their own system), but not a Type 1. The fan shroud is in the way.
A long time ago I ran a pair of 34mm kombi carbs on t3 manifolds on my 1641cc engine. The engine used a W110 engle cam.
The performance was no diferent than when I had a single carb, except that tuning was harder as the kombi carbs were pretty worn out.
Other problems I encountered was the manifolds when on the engine are too wide for the engine bay, so you need to modify the engine bay. Also due to the limited space in a t1 engine bay, they were painful to tune.
I ended up changing them to kadrons. That made an imediate improvment, as well as they are much easier to tune.
