Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

Those carbs are horrible out of the box. That’s just the truth. And they aren’t all the same tuneup from the factory.

The very first thing you need to do is move the idle feed restriction from the top of the idle feed well to the bottom. That requires some drill bits and taps. And some brass set screws.

You need 6/32 brass set screws for this. And the correct tap and drill.

If you do have an .031 idle feed restrictor I say that’s too big for what you are doing. I would drop it down to .028 and use a .070 idle air bleed to start.

Then you need to look at the emulsion stack. You should have four holes. The top and the third hole should be open and .028. The second and bottom hole should be blocked.

Do a search for T slot restrictors on the web. I use 10/32 brass set screws. You drill and tap the face of the main body for 10/32 and for that carb I’d start with a .070ish hole in the brass. You can tune it from there.

I wouldn’t use a main air bleed bigger than .026 but that’s me.

Also, you don’t need a heated intake manifold. I haven’t used one since 1981. Still don’t.

You have to get fuel out of it, and at this point you can’t do that by changing the jets.