idle feed restrictors holley

[Ultravk]

Hi, Anyone know what the std size of the idle feed restrictors on a holley 850 ultra xp is?
trying to lean out idle circuit a bit and i dont really want to strip it just to look
cheers

 

[Immortality]

Isn't the idle circuit adjustable via the screws on the side of the metering block?

Probably a good question to ask on the AV8 forum.

 

[Ultravk]

Isn't the idle circuit adjustable via the screws on the side of the metering block?

Probably a good question to ask on the AV8 forum.

Yea there is 4 corner idle adjustment screws, but inside the metering blocks there are interchangeable restrictions between the idle passage and the idle well.

 

[Immortality]

Yeah that' exceeds my knowledge on the Holley carbs

The AV8 forum is your best bet.