Idle tubes (removal or leave alone)

[GSP7]

In Cliffs book it shows removing the idle tubes. Looks like a good way to destroy or damage them.

Ive never removed them before when rebuilding years ago. I just blow carb cleaner through them to make sure they are clean... My carbs are not corroded

Comments

[Kenth]

The idle circuit in yours 1980 350 HD Truck Quadrajets is plenty generous with .038"-.039" idle tubes, .053"-.057" idle down channels .069 upper idle air bleeds,.062" lower air bleeds and about .105" idle bypass air.

If the tubes are clean there is no need to pull them out.

These 1980 Truck units don´t need much, if anything, for high performance usage.
If anything, cut the stop on air valves for full flow and use DA or CE secondary rods.

[GSP7]

Thanks

The '81 k20 4x4 truck is well takin care of, is just a driver, with mildly built engine is well babied, , Has a 73 date cast #010, 4 bolt block with 1970 cast #*****441 heads 1.94 in 1.5 ex, Elgin RV cam, headers