New Holley 4224 with big HS air bleeds??

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427dart
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New Holley 4224 with big HS air bleeds??

Post by 427dart » Fri Oct 05, 2018 8:20 pm

Have a brand new Holley 4224 and was checking the air bleed sizes.

The Primary Idle Air Bleeds are .070 but the High Speed air bleeds measure .041.. The Secondary Idle AND High Speed bleeds are all .041.

I had read some info where the High Speed air bleeds were .028 on a 4224. So can anyone give the correct size??

Primary jets are 76 with no power valve and a #12 secondary plate with .076 Main feed hole.

Casper393W
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Re: New Holley 4224 with big HS air bleeds??

Post by Casper393W » Fri Oct 05, 2018 9:21 pm

I have a virgin matched set at home I can check tomorrow for ya....

427dart
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Re: New Holley 4224 with big HS air bleeds??

Post by 427dart » Fri Oct 05, 2018 9:34 pm

Thanks!

Casper393W
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Re: New Holley 4224 with big HS air bleeds??

Post by Casper393W » Sun Oct 07, 2018 9:44 pm

I was able to measure my air bleeds and here are my findings
Primary Idle bleeds are .070"
Primary High Speed .028"

Sec Idle .040"
Sec High Speed .028"

Hope this helps...

My carbs have a build date code of 1449
They were both built on the 144th day of 1979

Andy

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