Carbs sucking air, carbs sucked air so I rebuilt them Options

[mikelsr]

I have a carb'ed teener that is having some problems. Every since I bought the car I have had problems with the carbs (40mm Dellortos). A friend of mine let me borrow his until I get my fixed (his run great on my car). Well it has been a while and I want to get them back to him. So I am looking for words of wisdom.

I am getting a lot of carb backfiring so I rebuilt the carbs and had exactly the same problem. I found a couple of places they were sucking air and replaced the O-rings with another set and that fixed those leaks but I am still backfiring. I assume that it is still sucking air (need to test it again) or an air passage is blocked. Tonight I will tear them down again and let them soak for a day or two and then blow them out really well. I thought I had cleaned them well enough but you ever know. I also think that the jets may need to be replaced with different sizes (I am going to start out with the same size jets my friend has since I know they work with this engine). I don't have the sizes with me here at work. What size jets do most people use? From what I know the cam is original so it was designed for FI. This winter I will replace the cam and most likely rebuilt the engine.

TIA

[SirAndy]

QUOTE (mikelsr @ Aug 29 2005, 01:59 PM)

A friend of mine let me borrow his until I get my fixed (his run great on my car).

don't know a thing about Dellortos but i'll bump this thread anyways ...

maybe your friend is *OK* with a carb swap? keep his and give him yours?
(IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Andy