Australian Ford/Holley 350CFM Carby


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By OzMainline - 10 Years Ago
I have a 272 with the original Ford 350 2 barrel Holley carby fitted. (Australian)
When I bought the car about March 2014, it had been sitting for quite a few years.
I fitted a new gasket kit, new PV and all the other bits you get in a non genuine kit, drove it home about 1500 miles.
It ran reasonably well but didn't have a lot of power- engine is a bit worn.
I have since pulled the carby apart again due to now having a bogging down issue at about half throttle.
PV is not blown.

The Power valve is a 65 and main jets are 50.
From what i have read so far, these may be lean jetting and too low a PV
Idle vacuum is about 18Hg and very similar at cruise....maybe 16Hg 
Should I have a 73 or 80 or 85 PV ??
And what jets ?? Or should I buy a selection and test?
Any info would be great, Thanks
By Ted - 9 Years Ago
This would be a good time to do a fuel pressure/volume check to rule out the possibility that the fuel pump is the source of your bogging problem.  If you can provide the list number from the air horn on the carb, there’s a chance that I or others here have literature here indicating what the original jet sizes were.  The original jet size is always a good place to start with any tune up changes and especially if it’s a factory installed carburetor.
By aussiebill - 9 Years Ago
OzMainline (12/31/2014)
I have a 272 with the original Ford 350 2 barrel Holley carby fitted. (Australian)
When I bought the car about March 2014, it had been sitting for quite a few years.
I fitted a new gasket kit, new PV and all the other bits you get in a non genuine kit, drove it home about 1500 miles.
It ran reasonably well but didn't have a lot of power- engine is a bit worn.
I have since pulled the carby apart again due to now having a bogging down issue at about half throttle.
PV is not blown.

The Power valve is a 65 and main jets are 50.
From what i have read so far, these may be lean jetting and too low a PV
Idle vacuum is about 18Hg and very similar at cruise....maybe 16Hg 
Should I have a 73 or 80 or 85 PV ??
And what jets ?? Or should I buy a selection and test?
Any info would be great, Thanks


Originally they had 320 cfm holley, no external float adjustment and lever operated float bowl vent, as ted rightly points out, start by identifying carb by list number, many had later 350 cfm fitted.
By OzMainline - 9 Years Ago
Thanks guys.
The list number is 2050
It also has CCOAE 9510 B stamped above the list number and also this tag (pictured)
It does have the lever operated vent, but does have an external float adjustment.

I should add, I have had the fuel tank out and cleaned out and have run a new fuel line from tank to fuel pump. I will check fuel pump pressure on Sunday, first day off work.

http://forums.y-blocksforever.com/uploads/images/6225f0e8-9afa-4844-9f03-aeaa.jpg
By aussiebill - 9 Years Ago
It is from 60-62 ford 332 engine and basically a H2-2300 HOLLEY.






OzMainline (1/2/2015)
Thanks guys.
The list number is 2050
It also has CCOAE 9510 B stamped above the list number and also this tag (pictured)
It does have the lever operated vent, but does have an external float adjustment.

I should add, I have had the fuel tank out and cleaned out and have run a new fuel line from tank to fuel pump. I will check fuel pump pressure on Sunday, first day off work.

http://forums.y-blocksforever.com/uploads/images/6225f0e8-9afa-4844-9f03-aeaa.jpg
By OzMainline - 9 Years Ago
Fuel pump was low on pressure, Will take too long waiting for a pump kit so fitted a electric pump, but has made no difference.
Upped the jet size to 58 (only ones I could find in town) from 50, goes a little better but still flattens out at anything above 2/3s throttle. 
Trying to find power valves in town now.....will probably have to get them mailed in.
Should invest in a oxygen sensor, I still have the air/fuel ratio meter I made about 20 years ago.