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Anonymous
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Can anyone reccomend a performance carb choice to go with the 250 2V head that I can find an adapter for?
Thx
Thx
Inline6Merc
Well-known member
The Holey 2300 series. It comes in 350cfm or 500cfm. You can but the adapter plate from fordsixparts.com to fit the aussie head.
Later,
Curtis
Later,
Curtis
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Anonymous
Guest
Inline6Merc
Well-known member
Yah that would be a 2300 500cfm 2bbl. That seems to be the performace 2bbl of choice on our kinds of six's. Retail from Summit cost 200 i think give or take a couple of bucks.
Later,
Curtis
Later,
Curtis
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Anonymous
Guest
go with the Holley 350cfm 2bbl. 500cfm is overkill on this engine, given the volume of fuel demanded. I'm installing the 350 cfm on my OZ head when it comes in in a few weeks. If you look around on ebay or on here, you can snap one up for cheap--i got mine for $30 or so, and i'll just rebuild it myself
good luck!
good luck!
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Anonymous
Guest
A Weber 38/38 DGS will give more balanced fuel distribution than a 2300 Holley 2bbl. It also flows a bit more than the 350cfm Holley. The Oz intake was designed for a carb with throttle shafts parallel to the crank. Depending how you mount it, the Holley may favor the front or rear cylinders.
Designed? I have no idea what it was designed for. It weas OEM'ed with a Stromberg WW which has the synchronous throttle plates at right angles to the crank CL. Think you've confused perpendicular and parallel in this instance (must be the Coriolis effect?Inliner":5853tcko said:
).Adam.
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Anonymous
Guest
No confusion here.
I did not know that they came with that carburetor however. Doesn´t make sense to me. Maybe Ford saw a way to save a buck after the intake was already designed and used the Stromberg? I think a similar carb with a pair of parallel throttle shafts (Weber or Solex) would run better.
I did not know that they came with that carburetor however. Doesn´t make sense to me. Maybe Ford saw a way to save a buck after the intake was already designed and used the Stromberg? I think a similar carb with a pair of parallel throttle shafts (Weber or Solex) would run better.
Howdy All:
The keep the CFM comparisons fair and Aples-to-apples, know that one and two barrel Holleys are rated at .3 of an inch pressure drop through the carb. Four barrels are rated at .1. For comparison, Slades 390 Holley 4 barrel is equal to 546 cfm using the one and two barrel standard.
This information is from the Holley tech line.
IMHO- With the right cam, a well tuned 200 with an OZ head could use a Holley 2300 500. A 350 may be more forgiving and streetable. The question should be what do you want.
I so feel that the orientation of the carb/butterflys of a Holley 2300 on the OZ manifold contributes to fuel distribution problems.
Slade- How is your #8007 oriented?
Adios, David
The keep the CFM comparisons fair and Aples-to-apples, know that one and two barrel Holleys are rated at .3 of an inch pressure drop through the carb. Four barrels are rated at .1. For comparison, Slades 390 Holley 4 barrel is equal to 546 cfm using the one and two barrel standard.
This information is from the Holley tech line.
IMHO- With the right cam, a well tuned 200 with an OZ head could use a Holley 2300 500. A 350 may be more forgiving and streetable. The question should be what do you want.
I so feel that the orientation of the carb/butterflys of a Holley 2300 on the OZ manifold contributes to fuel distribution problems.
Slade- How is your #8007 oriented?
Adios, David
I always get confused on that point.
For my orientation, my primaries/secondaries are oriented parallel to the crank with the primaries further out then the secondaries (so, sideways compared to normal V-8 orientation). That way gives both an easier throttle pull but also by my estimates a more even length of primary to cylinder across all cylinders to help all the cylinders to run evenly when under cruising loads.
Slade
For my orientation, my primaries/secondaries are oriented parallel to the crank with the primaries further out then the secondaries (so, sideways compared to normal V-8 orientation). That way gives both an easier throttle pull but also by my estimates a more even length of primary to cylinder across all cylinders to help all the cylinders to run evenly when under cruising loads.
Slade
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Anonymous
Guest
I live @ about 4500 feet above sea level and had to detune my 2300 500cfm holley quite a bit. I have an aussie head with a 262 duration cam 1.74in and 1.5ex valves.
I had to lower my float level quite a bit just to get the car to run and once I got it up running around town I ended up lowering it a little more. I've had to jet down from the 74's it came with to 62's. With all that said I had to go to a larger discharge nozzle but all the other adjustments I've made were to reduce fuel flow.
All this detunning leads me to believe that even with a more aggresive cam you can easily get by with a 350 version of the same carb. At least at this altitude. Maybe @ sea level or forced induction you won't have to jet down as much and can run a higher float level.
I had to lower my float level quite a bit just to get the car to run and once I got it up running around town I ended up lowering it a little more. I've had to jet down from the 74's it came with to 62's. With all that said I had to go to a larger discharge nozzle but all the other adjustments I've made were to reduce fuel flow.
All this detunning leads me to believe that even with a more aggresive cam you can easily get by with a 350 version of the same carb. At least at this altitude. Maybe @ sea level or forced induction you won't have to jet down as much and can run a higher float level.
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Anonymous
Guest
CobraSix":1gyifb2p said:
Slade, you have your 4bbl oriented perfectly as David and I see it. As the throttle plates open, they direct flow towards the center of the cylinder head, not towards the back of the intake or the front of the intake as the case with a Holley 2bbl (or even the original Stromberg).
Addo - Slade´s setup would be similar to a progressive 2bbl on the original intake. I don´t see what the difference would be if the progressive carb had another 2bbls.
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