Tuning your edelbrock mixture screw 2 and 1/2 turns out
Setting your edelbrock mixture screw 2 and 1/2 turns out is pretty much the gold standard for anyone trying to get their engine to behave after a fresh carb install or a long winter. It's that sweet spot that almost every gearhead mentions when you're complaining about a rough idle or a car that just won't stay running at the stoplight. While it might seem like a random number, there's a reason why 2.5 turns is the universal starting point for the Edelbrock Performer and AVS2 series. It gets you close enough to the right air-fuel ratio that the engine will actually fire up and stay running while you do the real work of fine-tuning. ...