How to adjust Holley Idle Mixture Screws and Curb Idle

This video is about setting up and adjusting the Curb Idle and Idle Mixture Screws for Holley Carburetors.

The car is a 1966 Mustang Fastback with a 347 Stroker and T5 transmission.

Shot with GoPro Hero 9 with the Media Mod, edited on Davinci Resolve 17.
Gear I use:

Credit for the music in the video:
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Epidemic Sound
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#krusebuilt
#kruseview
#Mustang
#1966
#fastback

[rorschach]

I've commented before but I'll comment again. This is by far the most helpful video I have found about adjusting a carburetor on YouTube. No bullshit, just helpful information explained in a very simple way. If you don't do this professionally, you should.

[SmooveBee]

The accelerator-pump adjustment segment is excellent! Thank You!

[v-vr-rotatev-vy_vx]

Had three, complete, , early 60s tri-power setups, for FE big block Fords, , , always closed the outer carburetors idle screws, , and outer carburetor butterfly plates closed as much as possible without jamming, , did all idle mixture screw settings on center carb only, , actually was able to get 19 mi to gallon on the open highway, , these tri-power setups idled perfectly and needed very little maintenance... 0:16

[gerardfenn]

You must be a Baker because when you explained that, it was "A Piece Of Cake". I never knew this and I'm old school. Dad never had a vacuum gauge . He just went by feel and sound and engine response. Now I'm a Happy Camper. Subbed and Thumbed. Nice Engine you have there!!

[HDx]

Should also touch on how to set the float levels. A few times now I’ve had friends with Holleys go through tuning like you show and can never get it to be snappy. I found it easier and better to set float levels and then tune from there. Nice video! Short sweet and to the point!

[NifBac]

Mines not idling high enough and dies when not on the throttle. This was very helpful cause this the first carb I've ever had. I didn't know which screws did what. Super helpful

[bd]

Just got a Holly Carb for my 65 mustang. I noticed it was running rich. This video helped out a lot.

[MisterSirGabriel]

First video that actually explained everything. Thank you so much. My truck is Running Better than Ever! 89' Chevy C1500 4.3l V6 - TBI to Carb Swap!!

[SilverbackSosaGarage]

Outstanding procedure thank you I am headed to tune my carb now. Thanks

[DanoG_]

looking forward to your first drive with the new engine!

[robertclymer]

Hi Andy! Nice and very detailed. As for the accelerator pump arm adjustment. .015 on the feeler gauge is where we want to be per Holley. I have seen guys that bury that arm into the diaphram like you eluded to. Thanks for sharing another gem with us. Good stuff.

[keanecoquete]

Using a Holley street avenger 770 CFM. 1000 rpm park and 800 rpm drive looks like the sweet spot (400 - 425 hp 350 sbc). Anything lower causes either a stall shifting into drive or a slow one after 15 mins of driving.

[kimmorrison]

Well done video, He covers idle adj sell and especially the accel pump adj. Thanks

[crownroyalcrew]

This is the best video I've seen explaining it. Great job

[SyracuseIsOranges]

Straight forward and easy to follow, will be using these steps and tips this weekend

[adammorton]

Great information! Great video! Thank you!

[waterkeeper]

I have the same fuel rail from Earls. On the second one and can't stop the leaks.

[unicornsteaks]

7:07 What RPM are you looking for at idle?

[mikecummings]

Good video. You made it simple enough, even I learned something.

[stang]

Nice bro mine is almost ready to crank can wait to see the drive video