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Username Post: 2x4 carb question        (Topic#52004)
Anonymous 

12-09-03 06:51 PM - Post#351826    

Could someone tell me what carbs went with a 2x4 setup in 1957? Are they scarce? Thanks. ken57

 
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rj_ly 
"6th Year" Gold Supporting Member & Tri-5 Calendar Creator
Posts: 17575
rj_ly
Loc: Southwestern OH
Reg: 11-15-02
Re: 2x4 carb question
12-09-03 08:41 PM - Post#351827    
    In response to

From what I've heard the carb without the choke is the hard one to find.

The carb with the choke is the same carb on a single 4bbl intake isn't it?

A true 2x4 set up with the correct carbs is worth a few bucks.

I've seen a few 2x4 set ups over the years people had the wrong carbs and swore they were the correct ones and wanted top dollar for the set up they had.

57 Hrdtp(mine for 40 YEARS JULY 12)
57 210 4-dr Sdn(37 yrs Aug 12)
57 Hrdtp(32 yrs Jan 12)
57(windowed)S. Delivery(31 yrs Oct 12)
57 150 Wgn(24 yrs Mar 12)
57 210 2-dr Sdn(8 yrs Oct 12)


 
Luva57 
Senior Member
Posts: 878

Loc: Va.
Reg: 05-13-03
Re: 2x4 carb question
12-10-03 03:12 AM - Post#351828    
    In response to

I think they were WCBF's(sp)?

 
vabeach56wagon 
Valued Contributor
Posts: 3066
vabeach56wagon
Loc: Chesapeake,VA,
Reg: 04-22-02
Re: 2x4 carb question
12-10-03 04:20 AM - Post#351829    
    In response to

For the 57's there were two sets of WCFB's on the two motors offered...the 245hp and the 270...part numbers you can find at Mortec, I think.

The 56 was offered with the 2-4's on the 265 as the top engine.

These carburetors ARE different from the single 4 bbl carb although you can adapt a single 4 to the rear carb set up with a change to the idle jet needles and using an adapter for the fuel line, if memory serves me.

They are available on the resale market, and are pricey...check Hemmings for the Corvette parts, or contact Bob Kunz in Missouri.


This is the 245hp setup in my 61 vette.
"Gobstomper": '56 210 9 passenger wagon.


Gobstomper Photo Site

Mechanical Music


 
Batwing57 
Senior Member
Posts: 158
Batwing57
Loc: Arvada, CO, USA
Reg: 02-17-01
Re: 2x4 carb question
12-10-03 08:45 AM - Post#351830    
    In response to

My 57 with the 270 HP 283 came with 2626S and 2627S carbs on it. One difference with the dual four carbs is that the throttle plates are slightly larger than the ones on a single carb installation. They also had brass vent tubes that run from side to side from the vent holes coming out of the bowls.
Bob Z.
57 Hardtop 2x4bbl 57 Nomad 65 Impala 396 4 speed 76 Caprice Classic 350 78 Malibu 305 4 speed 02 Silverado 5.3L 2WD


 
cardoc 
Senior Member
Posts: 435

Loc: Kirkwood, MO, USA
Reg: 10-09-02
Re: 2x4 carb question
12-10-03 12:14 PM - Post#351831    
    In response to

Correctly numbered WCFBs and correctly dated intake manifolds are scarce as hen's teeth and correspondingly expensive. If you go with the batwing aircleaner, you will pay about as much as Rochester fuel injection. You will also ned a bunch of other parts, like the distributor with no vacuum advance and the other stuff in RPO 411, including 3/8" fuel pickup and lines.

Bob Kunz can make clones that are close, but much less expensive. He can also get the originals. You pays your money and takes your choice.
56 Nomad 2-4bbls, Tremec 5sp 2001 Suburban 1500, with WhippleCharger


 
cardoc 
Senior Member
Posts: 435

Loc: Kirkwood, MO, USA
Reg: 10-09-02
Re: 2x4 carb question
12-10-03 12:16 PM - Post#351832    
    In response to

BTW, there was a running change on the number of the WCFBs used in '57. If you go original, you'll need to make sure you've got the early or the late ones, depending upon your car.
56 Nomad 2-4bbls, Tremec 5sp 2001 Suburban 1500, with WhippleCharger


 
vabeach56wagon 
Valued Contributor
Posts: 3066
vabeach56wagon
Loc: Chesapeake,VA,
Reg: 04-22-02
Re: 2x4 carb question
12-10-03 12:43 PM - Post#351833    
    In response to cardoc

The good thing about the manifolds is that the casting date was on the cam valley side of the manifold, underneath the oil shield.
"Gobstomper": '56 210 9 passenger wagon.


Gobstomper Photo Site

Mechanical Music


 
Anonymous 

Re: 2x4 carb question
12-10-03 03:43 PM - Post#351834    
    In response to vabeach56wagon

The reason I asked is because I bought a 2x4 manifold yesterday and wondered which carbs came on it. So from what I have read so far, these units were Carters, not Rochester, carbs. And there are differences between the front one and back. Is there any other carb that will be a direct bolton without going correct? (I know this will not be factory correct, but just until I can come up with correct carbs). Thanks, guys. You all are the greatest bunch of car nuts I know.

 
Anonymous 

Re: 2x4 carb question
12-10-03 05:54 PM - Post#351835    
    In response to

Ken (and others),
The 56-61 2x4 on Vettes and 56-57 2x4 on pass cars are Carter WCFB carbs. THEY ARE DIFFERENT FROM SINGLE CARB versions!!! The GENERAL appearance and configuration of the single and 2x4 carbs is VERY similar. For those who are not 2x4 knowledgeable, they DO look the same. Probably the most noticeable difference is that the 2x4 carbs are shorter than the single carbs. This difference is in the thickness of the iron base of the carbs (the rest of the carbs is alum). As mentioned, only the REAR carb has a choke. The front carb had neither the holes or linkage for the choke plate. Also, the front carb DID NOT have a threaded hole in the rear of the base for a vacuum source. When properly set up, floats precisely adjusted and the little brass tube added internally in the choke passage, these carbs work great!
The choke housing on the rear carb is located high on the housing, the same as on the early single carbs (later single carbs had the choke housing mounted low). You CAN use some of the early single carbs on a 2x manifold. The center boss on the rear of the carb (installed on the front of the manifold) WILL touch the carb mounted at the rear position. It may also require some careful trimming to eliminate the interference. But it will work. IF YOU USE 2 SINGLE CARBS ON A 2X4 INTAKE, THE 2 CARBS NEED TO BE THE SAME!!! You can completely remove the choke plate/shaft/linkage from the carb used on the front. After installing 2 single carbs on a 2x4 intake and adding an air cleaner, no one except the very knowledgeable 2x4 folks will know the difference. Both fuel lines and 2x4 linkage and return springs are reproduced, which would be worth the expense. The original throttle linkage is designed so that you can connect the carbs progressively (the rear opens first) or shotgun (both open together).
Even though the 2x4 engines had dual point distributors without a vacuum advance, ANY point type dist up through 74 with or without a vacuum advance can be used. The only thing is, with a vac advance dist, it may be a little difficult getting it installed just right so that the vac can doesn't interfere with the rear carb mount. Personally, I prefer a vac advance dist for street/daily driving.

(by the way, SINGLE carbs have larger throttle plate bores than the 2x4 carb throttle plates)

 
rj_ly 
"6th Year" Gold Supporting Member & Tri-5 Calendar Creator
Posts: 17575
rj_ly
Loc: Southwestern OH
Reg: 11-15-02
Re: 2x4 carb question
12-10-03 07:59 PM - Post#351836    
    In response to

Any 2x4 set ups I've seen over the years had pretty steep selling prices. Even just the 2x4 intake, bare.

These set ups were all or more minus the Batwing air cleaner.

In '81 a good friend happened on an original 2x4 set up that included a duel point distributor for $200. I couldn't buy it fast enough even though there was no air cleaner. I still own this today.

A guy in the Classic club we used to have around here had an original 2x4 set up his father bought just before he passed away in '82. This guy ran it on his '57 Hardtop until his ex-wife sued him for divorce. He sold the carb & intake to another club member for $250 who slapped it on his restored Nova.

57 Hrdtp(mine for 40 YEARS JULY 12)
57 210 4-dr Sdn(37 yrs Aug 12)
57 Hrdtp(32 yrs Jan 12)
57(windowed)S. Delivery(31 yrs Oct 12)
57 150 Wgn(24 yrs Mar 12)
57 210 2-dr Sdn(8 yrs Oct 12)


 
Anonymous 

Re: 2x4 carb question
12-11-03 04:31 AM - Post#351837    
    In response to

DZ, will there be any interference between the throttle plate and the manifold since the bores are larger? Just curious if there is anything else that needs to be addressed. Thanks. ken57

 
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