n00b carb ?

[ty-rone]

I did a carb swap in my 89 lx and so far most things have gone smooth. Although I have driven the car all of 1000km in 3 years. I had a stock 600 motorsport carb i had rebuilt but without the emissions crap. So far it has worked out alright.

My nQQb question is well very noobish. I was just wondering what those 2 tubes which stick out the top of the carb do. Are they vents? Are they supposed to hook to anything? It's a fairly pathetic question which I am sure I knew at one time but have no idea now. When I rev my stang, the engine makes a kind of hissing wind sound briefly before the rpm's climb and the nice rumble kicks in. Is this normal and if not qhat causes it?

John

 

[SmockDoiley]

They are vents for the front and back fuel bowls. Air needs to leave when gas is entering.

 

[ty-rone]

Ok, so now that is answered what about the hissing sound. Again, when I first get off idle there is a hissing wind like sound comming from the carb. After you open the throttle a little more it goes away. Is this normal or is it a sign of a vacum leak or somthing?