last try.
stupid Webshots

 

adHarvey2, thanks for the effort. I saved the diagram for future reference. It appears a little different than this carb but will help. There arent any secondary jets shown, and of course not the hand throttle (which I dont think matters). Also it is a '61, and the part number on the carb in hand is definitely '62-'63, which maybe the difference in secondary jets.

It is beginning to sound like the carb doesnt have a ported vacuum, and that may end up being my biggest headache. Reviewed Y's forever regarding ported and non ported vacuum to dist. It sounds daunting but will forge ahead.

 

I also have the 62 - 63 book and those HD engines did not use vacuum advance either.

 

Hey fellas, i couldnt help but reply...I just picked up a Ford ECZ 9425 B intake for my 272 and wanted to find out a good 4V source...Timmy's Y page said a Holley 4150/4160 would be a good addition...But from what I hear you guys doing, and for cheaper...now I'm wondering??? any suggestions, or does anyone have 1 to spare???

 

Congratulations on finally finding an intake! But dont go down my road, because not sure it will work yet. You want a 390 cfm Holley. Rick should have the number. In new form I saw where they were either $329 or $379, maybe it was at Summit.

 

great info, i'll check summit. does it matter if its a manuel choke or auto? or do i want to keek the manuel setup?

 

I got a Holley 390CFM with a manual choke on my 292 and it operates impecably.

 

Manual is my preference, or no choke.

 

C3TE-9510-F = C3TZ9510A .. 4V Holley Carburetor (Motorcraft CA241) / Obsolete

B7TZ9502A .. Carburetor Gasket Set (Motorcraft CG191) / Obsolete

MILLER OBSOLETE PARTS in Binghamton NY has 2 = 800-546-7278.

GREEN SALES CO. in Cincinnati OH has 2 = 800-54304959;

SOEBY MOTORS in Walhalla ND has 7 = 701-549-3711.
-----------------------------------------------------
C1TZ9A586G .. Carburetor Tune-Up Kit (Motorcraft CT193A) / Obsolete

BOWMAN SALES & SERVICE in Bowman ND has 2 = 701-523-3257.

GREEN SALES CO. has 6.
------------------------
C1TZ9590N .. Carburetor Major Overhaul Kit (Motorcraft CR322) / Obsolete

BOWMAN SALES & SERVICE has 1.

MILLER OBSOLETE PARTS has 3.

GREEN SALES CO. has 7.
------------------------
789533B .. Main Metering Jet #48 Primary (Motorcraft CJ55) / Obsolete

GREEN SALES CO. has 5.

SMITH AUTO CO. in Spanish Fork UT has 13 = 877-227-6484.
-----------------------------------------------------------
789533A .. Main Metering Jet #50 Primary (Motorcraft CJ54) / Obsolete

SALEM MOTORS in Crookston MN has 13 = 218-281-1338.

GREEN SALES CO. has 36.
--------------------------
86H9533 .. Main Metering Jet #52 Primary (Motorcraft CJ62) / Obsolete

SOEBY MOTOR CO. in Walhalla ND has 4.

GREEN SALES CO. has 43.
~~~~~~~~~~~~~~~~
O6H9533 .. Main Metering Jet #54 Secondary (Motorcraft CJ43) / Obsolete

SMITH AUTO CO. has 1.

LYLE'S FORD-MERCURY in Eagle Grove IA has 8 = 800-397-6319.
--------------------------------------------------------------
789533E .. Main Metering Jet #56 Secondary (Motorcraft CJ57) / Obsolete

MILLER OBSOLETE PARTS has 18.

GREEN SALES CO. has 25.
--------------------------
789533F .. Main Metering Jet #58 Secondary (Motorcraft CJ58) / Obsolete

SOEBY MOTOR CO. has 1.

WRIGHT COUNTY MOTORS in Clarion IA has 4 = 515-532-6603.

 

Howdy,



I bought the Holley #0-8007 model carb from Advance Auto Parts.

It listed for $360 or so and they offered a $30 "coupon" so it was Roughly $330.


This is a NEW model 4160 type 390 CFM carb (with electric choke)

It's also the carb that Holley Tech Support recommended for my 292. (I called them)


If you have a stock engine you really don't need a bigger (CFM) one.

Right now, they're running a 20% off on the same deal with free shipping.

$361-20% is About $290 + free shipping! I wish I had waited!!

I debated getting a manual choke model (since I have a choke ****) I didn't get it. The Holley Throttle Position Kit I am installing only works with electric choke model carbs.

If you only "boat" in warm weather, you really don't need much choke. I disconnected it on my 454 marine engine! With an electric choke, you can either not connect it or adjust it for minimum choke.......


Cheers,


Rick

 

So, Timmy's y block page says 4150 Holley with 650cfm...you said 390cfm...what's going to be the difference? running to rich?

 

Here we go. I think 650 cfm is too big for a stock or close to stock street 292. You could probably get it tuned to work, but the tendency may be to run too lean, requiring larger jets. The reason being that with a relatively small displacement engine at low rpms, there is a relatively low velocity of gas going through the venturis, giving less gas per given volume of air. Mileage wouldnt be as good or low end throttle response. On the other hand if maximum performance is the objective on a modified engine at high rpms, the 650 would suite that purpose. 390 cfm Holley is what Ford put on the Y's from the factory (and Autolite 4100s plus Carters), and a new one with vacuum secondaries should be close to a drop and go application. IMHO.

Last year I used an Autolite 2100 1.14 venturi carb that came off a 352 truck. It needed 2 sizes larger than stock jets to get the plugs looking right, apparently/maybe due to the lower air velocity. No big deal, but it may be an example of the above comment.

There are other choices possible. Autolite 4100 1.08 venturi (expensive and can be hard to find a good one), Edelbrock 500 cfm, Holley 465 cfm Street Avenger, Demon Jr. 525.

On my first low compression 292 I tried a 600 cfm 1850 Holley. It was a mess. Never did get it to work right. May have been a combination of many variables. A 600 could likely work on the current engine, but again the smaller carbs are better suited to the engine and the way it is used.

There are many sites that warn against the common tendency to run excessively large carburetors for the application. But the tendency remains alive and well.

 

46,

I like the idwea of drop-n-go...I'm not looking for street performance, (maybe if I have a 292 or 312 to build up) but my 272 will satisfy...There is a local who's selling a 4150 600cfm w/ manuel choke for 100$ so that's why i wantned advice...I think i want to steer towards the 390cfm though

 

I'm gonna agree with Mike,

A carb that is capable of a higher CFM than necessary, doesn't cause the engine to run richer at all.

It will affect throttle response though.

You can size a carb somewhat larger than an engine needs. It's really dependent on what the upper MAX RPM is for the particular cu-in engine.


A normally aspirated (non-supercharged) engine will only "breathe" so many cubic feet of air at a given RPM. The faster you turn the engine, the more air will pass through the engine up to the point where the valves start to float.


Since most of us are not turning our engines 8000 RPM, there's really not much point in having a carburetor that is capable of air/fuel flows to handle it.....



Regards,


Rick

 

A carburetors ability to meter the fuel is more important than how much it flows. A larger carburetor can do better throughout the RPM range than a smaller carb if it meters the fuel better. There was a very informative carburetor test in Y-Block Magazine recently. It was performed on a typical modified Y - cam swap, headers, intake, no porting. There was not a noticable trend relating to cfm. In fact, if I'm remembering right, a 650 proved to be the best - and we're talking average power, not just peak, so it was stronger throughout. 2nd and 3rd place were carbs below 500cfm, however. If I remember, I'll look it up tonight.

Anyhow, there is one problem with this. Average Joe, you and me, does not have the funds to try 5 or 10 carburetors to find the one that works best so we have to work with what is commonly accepted - smaller carbs tend to be better for street vehicles. And there is something to be said for 53 years of development, typically a modern carburetor will outperform an older carburetor - so it also depends on what look you are going for.