I have a pair of Webber 40 DCNF carbs on my XR2. The problem I'm having is that I've plugged a TIM vacuum gauge in to a port on each carb and I'm not getting any readings. Am I being a dumbass or are the ports circled in red below not the vacuum ports???



I dont understand!

Cheers

Lee

 

Right, the carb on the left (One with brake servo outlet) has a pipe sticking out of the front of it, is this a vacuum, as i've seen pics on the web of these carbs with pipes off there!

I'll try it!

 

Don't think the small ones are vacs but the one on the inlet is some pinto manifolds come with a twin take off one big one small ideal for wot u need

 

Hi
If your trying to use them for tuning there is an easier way to balance them which i devised when i had a lotus sunbeam. pm me if you're interested.

Cheers: Bart

 

Cheers Lads, the one on the manifold is connected to the brake servo, so I dont particularly want to T this one.

I'm not trying to tune them, They're balanced already, I'm trying to find out why there was no reading!

I've been told that all 4 vac's need to be connected together and then to the dizzy, otherwise whatever is connected directly to one port will only pulse for a quarter of a cycle, which makes sense.

I will ask tho killerscum01 mate if you could describe how to tune them!

Cheers

Lee