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Discussion Starter · #1 ·
What would be the best way to disable the secondaries on a Holley 4 barrel? Thanks

The number on the carb is "6R 7809"
 

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Mechanical Secondaries or Vacuum Secondaries?
If you don't know, there is a list number on the air horn that houses the choke blade.
The list number will face the front float bowl.
Give me that list number, and I will give you the info on your carb...

"I Have The Body Of A God... Buddha"
 
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Discussion Starter · #3 ·
Aaron, I believe the number is 6R-7809. Thanks again for the information.. ;)

 

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6R-7809 doesn't come back as a ligimate list number...

See the attached photo to double check the location of the list number...

"I Have The Body Of A God... Buddha"
 

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Discussion Starter · #5 ·
Oops/wwwthreads_images/icons/blush.gif The number is 80457 Thanks a bunch/wwwthreads_images/icons/crazy.gif
 

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Well Ken, Here we go...

Carb P/N (List)................................R-80457
Model .............................................4160
CFM...............................................600
ReNew Kit .....................................37-119
Trick Kit..........................................37-933
Primary Needle & Seat ...................6-506
Secondary Needle & Seat ...............6-506
Primary Main Jet .............................122-69
Secondary Main Jet or Plate ............134-39
Primary Metering Block ..................134-128
Secondary Metering Plate ...............134-39
Primary Power Valve .....................125-65
Primary Discharge Nozzle .............. .031

Secondary Spring Color...................Black
Primary Bowl Gasket.......................108-83-2
Primary Metering Block Gasket........108-89-2
Secondary Bowl Gasket...................108-90-2
Secondary Metering Block Gasket...108-90-2
Secondary Metering Plate Gasket.....N/R
Primary Fuel Bowl...........................134-101
Secondary Fuel Bowl.......................134-105
Throttle Body & Shaft Ass...............N/S
Primary Venturi Diameter.................1-1/4"
Secondary Venturi Diameter............1-5/16"
Primary Throttle Bore Diameter.......1-9/16"
Secondary Throttle Bore Diameter...1-9/16"
Primary Acc. Pump Volume.............30CC
Secondary Acc. Pump Volume.........N/A

You might want to print this page out and keep it.
Not everyone has this info...
It helps to note any changes on this page so you know what has been done six months or a year from now...

"I Have The Body Of A God... Buddha"
 

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To answer your orignal question...

See the attached picture...
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The secondaries of your carb are controlled by a vacuum diaphragm.
That diaphragm is normally located on the passenger's side of the vehicle, an slightly to the rear of the centerline of the carb.
The top cover is about the size of a silver dollar.

The diaphragm pull on an actuator rod.
That rod pulls the secondary throttle shaft that opens the throttle blades.

To remove the actuator rod from the secondary throttle shaft, you must remove a 'C' clip.
That 'C' clip is very small, and easily damaged, so be careful.

Once the 'C' clip is removed, remove the actuator rod from the shaft linkage.
The rod can just hang in space until you decide to hook it back up again.

This secondary throttle shaft linkage MUST be secured to prevent the secondaries from opening.
Use a wire or 'zip' tie to keep them shut...

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Just out of sheer curiosity, Why the heck do you want to disable the secondaries for anyway?....

"I Have The Body Of A God... Buddha"
 

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Discussion Starter · #8 ·
The reason being that I am getting gallons per mile. I am very light on the foot and can't figure out why I'm getting $%^&*@ gas mileage/wwwthreads_images/icons/frown.gif
 

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It could be a lot of things...
That carb has the power valve protection, so it's probably not a blown power valve...

It could be a lot of things.
I don't think unhooking the secondaries is going to help, but it might show a problem...

Did you buy the carb new, or did someone have a chance to fiddle with it before you got it?


Your bio says Washington...
Washington state or Washington D.C.?



"I Have The Body Of A God... Buddha"
 
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Discussion Starter · #10 ·
I have had this Jeep for over two years and no one has messed with the carb while I have had it. Possible rebuild issue, i.e. float level. I have heard that the newer Holley 4010/4011 series get really good mileage, up to 25 miles per gallon on Chevy 350? Do you know about these carb? If I have the motor turned off and sitting with the key on position for a few minute, when I try to start the engine it has a hard time starting.
 
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Discussion Starter · #11 ·
It's a V8 Chevy 350 with 24,000 miles on motor. My rig has so much electronic powered equipment that is why I would rather stay away from fuel injection. I really appreciate the information on the 4160 carb. Thanks again....

 

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I'll send you some tuning instructions for your Holley...
It's pretty easy once someone explains it to you...

Get a vacuum gauge...
Beg, borrow or steal one.
It's absolutely necessary to have a vacuum gauge to tune a carb...
You will also need a couple of extra sets of spark plugs, and some way to clean them really well...

I'll send instruction to your email address to avoid problems.
This is pretty simple stuff, and as you know from the pictures, I have a carb almost like yours on the bench right now...
I'll take some pictures, and try to point out what I'm talking about...

Let me know if you are interested...

"I Have The Body Of A God... Buddha"
 
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Discussion Starter · #13 ·
TeamRush..Id be interested in your Holley adjustment instructions too. If not much of a hassle, could you email them to me also..

Thanks a ton!

Kraig

That which does not kill me only makes me stronger (or dumber).
 
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Discussion Starter · #14 ·
/wwwthreads_images/icons/smile.gif Thanks ... pics and instructions would be great. I just picked up a AED rebuild kit from NAPA. Will be going over to Randy's Off-Road gathering in Moses Lake, WA. this weekend and will rebuild the carb today and tomorrow. Thanks again.../wwwthreads_images/icons/cool.gif /wwwthreads_images/icons/wink.gif
 
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