Holley model 4160, series 3310 carbs

[patrickt]

Originally Posted by trularin

One thing Pat didn't add was it is easy to work on.

It's really easy to work on. I mean really, really easy to work on. Unless something's broken, there's really not much to it. Doug, since your car is running well I wouldn't even bother removing the sight plugs to check the floats (I'm worried you'll spill gas on the hot primaries). Just hook up a five dollar vacuum gauge like you see in my pic below, and then with the car warmed up and running, adjust the idle mixture screws until you get the highest vacuum. Adjust both screws the same amount. Then adjust your idle screw down so that your idle is at a rev that you like. Then do the idle mixture screws one more time -- some guys like to "enrichen" the mixture just a bit at idle after you've found the highest RPM setting. That can help for a smooth start. If you have a turkey pan that is not removable you're going to have a hard time getting the vacuum gauge on the manifold vacuum fitting that is under the front of the carb. The trickiest part of this whole exercise is just getting the vacuum hose on the fitting and not dropping the little black rubber cap that's on there down in to your engine. You can see in my pic another little black cap on the side of the carb just above the idle mixture screw. Don't hook your vacuum gauge on there. Here are the 4160 instructions:
http://www.holley.com/data/Products/...199R8108-2.pdf