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Holley carb no B 0457-2 Please identify ? - Cars & Trucks

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2 Answers

Have fuel going out of vent tube on my two barrel Holley carb


Maybe the float is stuck or needs adjustment? Maybe a carb kit?
Holley has their own web site, at the bottom of page there is technical resources--library. I just briefly took a look, holley.com

Oct 16, 2016 | Cars & Trucks

2 Answers

Holley carb dribbles gas on one side on primary.


Daniel, You may have to replace needle and seat in carb. and check float levels. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Holley CarburetorNeedle and Seat Flooding Repair Page 1
http://www.vintagemusclecarparts.com/images/techsection/needleandseat.pdf
Holley gurus help Primary boosters dribbling Chevelle Tech

Jul 20, 2016 | Cars & Trucks

1 Answer

Holley 470 flooding when not started


Needs a rebuild. Diaphragm is sticking in it. Holley carbs are notorious for that. I highly recommend running 93 octane or higher when using a Holley!!

Feb 20, 2015 | Cars & Trucks

2 Answers

I have a 83 mustang gt 302 a Holley 600 it's


For those like me with a good old fashioned Holley type carb, here's a real nice video on the basics. He's gonna be doing more in-depth videos in the future. This cat flat out knows carbs!

Apr 17, 2013 | Cars & Trucks

2 Answers

How do i tune a 750 double pumper carb


For those like me with a good old fashioned Holley type carb, here's a real nice video on the basics. He's gonna be doing more in-depth videos in the future. This cat flat out knows carbs!

Aug 21, 2012 | 1983 Chevrolet Chevy

1 Answer

Need 2 replace accelerator pump diaphram 4 holy 64-3262 carb would like visual breack down


Please watch the Holley instructional video on the replacing of th epump in any Holley series 4 barrel.
Click HERE

Jul 12, 2012 | Dodge Cargo Cars & Trucks

1 Answer

I have a 1984-85 holley 4 barrel and it has


Electric fuel pump most likely has too much pressure for the carb. AFAIK, the Holley 4150/60 & 4165/75 should each demand the usual 4.7-5.3 PSI (4.7 @ idle, 5.3 @ max RPMs), so even the Holley red pump would need some restriction from a regulator. If you want this to be adjusted to its best efficiency, you need to have a fuel pressure gauge installed temporarily, if not on the regulator like I have on my Scout II. FWIW, the regulator I have installed is the Mallory 4307M from CenturyPerformance.com, Summitracing.com, Jegs.com, etc.

http://www.malloryperformance.com/pdf/4307M.pdf

A bad Needle & Seat will do this also, or debris stuck between the Needle and the Seat. This is where light tapping on the bowl helps, but it's best to run the fuel out of the bowl a few times and then the volume flow, or quick filling of the bowl, should loosen up the debris.

You also could have set he fuel float too high. What model carb, the ones I mentioned above (AKA Holley Modular Carbs)? If so, then Holley's site has a tech center & instructions on setting the float(s). www.holley.com

Set the floats carefully and slowly/gradually. Make sure the lock screw is always loose enough before turning the adjustment nut. If you strip out the bowl's threads on an older carb, you'll beat hell finding a replacement. 1/12 turn = 1/32" of fuel height IIRC. You set the fuel level, with pump running (wrap a rag around the carb so gas doesn't leak onto the manifold!!!) so the fuel is just starting to dip out of the "peep-hole" in the side of the float. Removal of the peep/seep-hole screw/plug is necessary first. Clockwise rotation of the nut lowers fuel level IIRC and counter raises fuel level. Again, please check their website. Most people get discouraged when dealing with the Holley Modular Carbs, but they are the simplest and the best carbs on the market. Even if 30+ years old.

Apr 15, 2010 | 2000 Ford Expedition

1 Answer

I'm after a drawing for a 180 holley


Holley.com has parts fiche pics of all the parts for each carb, provide them a list number and they will email you specific info on your carb.

Apr 01, 2010 | 1988 Mitsubishi Galant

2 Answers

How do you adjust the float in a holley carb series 6280


Go to Holley.com they have links to you tube videos showing how to adjust the floats and choke on all their carbs.

Mar 29, 2010 | 1985 Dodge Ramcharger

2 Answers

I need to adjust a carberater and get the 4 barrel to start working


Most likely you have a Holley carb. You may have a 460 engine. If you have the carb with a big vacuum pot in front of the carb, then you have a RPM governor. The RPM governor will work against the 4 barrel.

The main mixture for the idle jets can be adjusted like any old style carb. You may have plastic caps over the idle screws but take them off. Then use a vacuum gauge on any intake fitting and proceed to read the vacuum level as you turn the mixture screws. You want the mixture to reach a maximum RPM, then evenly turn the screw in until the RPM drops slighty and then balance for smoothest idle.

After this step adjust curb idle and see if this helps when the 4 barrel kicks in. Holley has different springs for the vacuum actuated secondaries and they are color coded. If the carb is original it should be right, but if the carb is of unknown origin you can check the proper vacuum spring, main jet, power valve and so on in a good Holley book. The mechanical secondaries are also listed with clearances to hand adjust.

By adjusting the mixture screws you have set the engine to idle just below peak vacuum pressure. This means you should have more vacuum to work the secondaries.

Feb 16, 2010 | 1983 Ford F 350

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