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Holley Carb Problems
https://slantsix.org/forum/viewtopic.php?t=41551		 Page 1 of 1
Author:  BMXICAN [ Sat Aug 21, 2010 5:12 pm ]
Post subject:  Holley Carb Problems
Hello, I have been tinkering on my free time with this Holley carb on my Scamp. I believe it's off a Ford, but I have no way to confirm. Anyone know what model carb this might be?

Anyway, besides the fact. I got the carb all mounted up and I hooked up the gas line. When I crank the car over and the fuel system is under pressure, the carb just pours (and I mean just pours) gasoline out of the center of both venturis.

I opened up the carb and really couldn't find anything out of the ordinary. Anyone ever dealt with something similiar? Any advice? Thanks guys, I appreciate it.

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Author:  Fopar [ Sat Aug 21, 2010 6:03 pm ]
Post subject: 
Just a suggestion check float level adjustment. That would be the big nut and screw on the float bowl on the top where the fuel line is.

Richard
Author:  DusterIdiot [ Sat Aug 21, 2010 6:13 pm ]
Post subject:  Yep...
I would do 2 things right off the bat:

1) Pull the float and put in a cup of gas and see if it really does float (Holley cheaped out and used Nitrophyll "Foam" Floats in their carbs and a pin hole will eventually load it and sink it).

2) If float is good, bend tab that contacts the needle at top of float pivot and readjust your seat adjustment...Holley 2300/4150/4160 likes the float to be level when you turn the bowl upside down...

-D.Idiot
Author:  BMXICAN [ Sat Aug 21, 2010 10:47 pm ]
Post subject: 
Excellent, that was perfect. Thank you for the help! :D
Author:  emsvitil [ Sat Aug 21, 2010 10:58 pm ]
Post subject:  Re: Yep...
Quote:
1) Pull the float and put in a cup of gas and see if it really does float (Holley cheaped out and used Nitrophyll "Foam" Floats in their carbs and a pin hole will eventually load it and sink it).

Not a really good test. I've had floats, that still floated; but they were bad...


Figured it out when I weighed the float and found it was heavier after being in gasoline for awhile (vs sitting on a desk for a week)
Author:  BMXICAN [ Mon Aug 23, 2010 4:14 pm ]
Post subject:  Re: Yep...
Quote:
Quote:
1) Pull the float and put in a cup of gas and see if it really does float (Holley cheaped out and used Nitrophyll "Foam" Floats in their carbs and a pin hole will eventually load it and sink it).

Not a really good test. I've had floats, that still floated; but they were bad...


Figured it out when I weighed the float and found it was heavier after being in gasoline for awhile (vs sitting on a desk for a week)
Ah, I'll remember that....
I just didn't know how to adjust the float, never had a Holley 2 BBL. Learn something new everyday. Thanks again!
Author:  BMXICAN [ Thu Sep 30, 2010 10:58 pm ]
Post subject: 
Just out of curiosity, you guys running 2300's, did you re-jet the carb or run it as is?

I put my car on the smog machine at school and it's running pretty rich.
I am getting crappy MPG's, like 12 to 14.

Timing is set to 5° BTDC. All advances work. Using Mopar E.I.
Car stumbles and dies at W.O.T. I have to creep on the throttle.

I'll try to get a picture of my setup tomorrow. Thanks for the advice. :D
Author:  maxracer [ Fri Oct 01, 2010 7:25 am ]
Post subject: 
There are different 2300 carbs. 500's,350's, and a replacement carb # 4346-3 which is a replacement bolt on for many carbs . It flows 375cfm. I found the 500 to be too large for my build so I finally found a 375 as the 300 was too small. Hope this helps.
best regards,
MaX
Author:  BMXICAN [ Fri Oct 01, 2010 12:52 pm ]
Post subject: 
Which numbers should I look for to know what model I have?
Thanks!
Author:  maxracer [ Fri Oct 01, 2010 2:56 pm ]
Post subject: 
You should check on the choke horn then cross reference that number on the Holley.com site. It is called a list number. there are lots of numbers so be patient (lots of numbers for the same carb even)
Regards MaX
Author:  BMXICAN [ Fri Oct 22, 2010 5:14 pm ]
Post subject: 
Quote:
You should check on the choke horn then cross reference that number on the Holley.com site. It is called a list number. there are lots of numbers so be patient (lots of numbers for the same carb even)
Regards MaX
OK, finally got around to it.
It is a Holley 2300 500 cfm.
It has inside 58 jets and the power valve has a 9 and a 5 stamped on it.

Too big? I'm thinking of swapping this carb onto my new truck since it has a 318 and steal the carter 2 bbl it has on it.

Whatcha think? :?:
Author:  BMXICAN [ Sat Oct 23, 2010 8:54 am ]
Post subject: 
Got the problems situated.

Put the 500 cfm Holley on my 318, and it runs good, still needs some tuning. I'm pretty sure the power valve is too small. I did get up to 68's though.

The Scamp is running much better now that it isn't over carbed, it likes the little two barrel...

I noticed this two barrel isn't the original Carter, instead it's a re-manufactured Stromberg two barrel. Any takes on that? :)
Author:  wjajr [ Sat Oct 23, 2010 11:14 am ]
Post subject: 
BMXICAN:
Quote:
Put the 500 cfm Holley on my 318, and it runs good, still needs some tuning. I'm pretty sure the power valve is too small. I did get up to 68's though.
Holley's standard single stage power valves all provide the same enrichment, the different numbers are vacuum ratings. As the vacuum drops under hard acceleration, at some predetermined point, the valve opens adding more fuel to what the main jet can contribute.

One needs to select a power valve based on idle vacuum. Holley’s rule for selecting the correct power valve can be found here.

If you select a valve that opens at too low vacuum, acceleration will suffer, if it opens at too high a vacuum, economy suffers because it will open under light acceleration.
Author:  BMXICAN [ Sat Oct 23, 2010 1:12 pm ]
Post subject: 
Quote:
BMXICAN:
Quote:
Put the 500 cfm Holley on my 318, and it runs good, still needs some tuning. I'm pretty sure the power valve is too small. I did get up to 68's though.
Holley's standard single stage power valves all provide the same enrichment, the different numbers are vacuum ratings. As the vacuum drops under hard acceleration, at some predetermined point, the valve opens adding more fuel to what the main jet can contribute.

One needs to select a power valve based on idle vacuum. Holley’s rule for selecting the correct power valve can be found here.

If you select a valve that opens at too low vacuum, acceleration will suffer, if it opens at too high a vacuum, economy suffers because it will open under light acceleration.
Thanks for the 411< that helps a lot! Much appreciated! :D
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