C1 - problems with clone 2x4 setup
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Joined: Feb 2006
Posts: 97
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From: Bonner Springs Kansas
C1 - problems with clone 2x4 setup
I purchased a set of WCFB clones over two years ago from a vendor I met at Bloomington. The car is about ready for the road, it starts and runs good, but I ran into a clearance problem when fitting the hood. Can these WCFB carbs be reworked to solve my clearance problems? Who would you recommend? Please don't suggest that I send them back to the vendor, I wouldn't give him the satisfaction.
Thanks in advance,
Paul
Thanks in advance,
Paul
Burning Brakes
Joined: Mar 2004
Posts: 1,108
Likes: 4
From: Plano Texas
Exactly, what's the problem? Hood hits the top of the air cleaner? Hood hits the screw-in air cleaner hold downs? Are you using the correct intake manifold? Is the front fiberglass front end of your car drooping?
Team Owner
Joined: Aug 2007
Posts: 58,061
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Army
Unless you have a high-rise manifold or some strange variant of WCFBs they should fit by default - they were stock equipment for the hi-horsepower, non-fuely cars in '61. I run a pair myself with no clearance problems. http://members.capital.net/com/studiog/CarterWCFB/
Has somebody put a big carb spacer underneath the WCFB's to reduce heat exchange ? Pictures would help.
Has somebody put a big carb spacer underneath the WCFB's to reduce heat exchange ? Pictures would help.
Burning Brakes
Joined: Oct 2004
Posts: 953
Likes: 27
on real 2x4 carbs, the carb bases are about 1/4" thinner than a regular WCFB base. that is possibly what the problem is.
however, i have seen clones on many other vettes and saw no problem.
make sure your engine mounting and trans crossmember are correct and installed correctly.
how much room are you lacking?
in the pic you can see the front carb has the wrong base, and the rear carb has the correct base. Notice the height difference between the two carbs.
however, i have seen clones on many other vettes and saw no problem.
make sure your engine mounting and trans crossmember are correct and installed correctly.
how much room are you lacking?
in the pic you can see the front carb has the wrong base, and the rear carb has the correct base. Notice the height difference between the two carbs.
Last edited by L78racer; Oct 17, 2007 at 10:40 PM.
Race Director
Joined: Nov 2000
Posts: 10,340
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From: Beverly Hills (Pine Ridge) Florida
I purchased a set of WCFB clones over two years ago from a vendor I met at Bloomington. The car is about ready for the road, it starts and runs good, but I ran into a clearance problem when fitting the hood. Can these WCFB carbs be reworked to solve my clearance problems? Who would you recommend? Please don't suggest that I send them back to the vendor, I wouldn't give him the satisfaction.
Thanks in advance,
Paul
Thanks in advance,
Paul
What air cleaner were you using, and are you sure the engine is located at the correct hgt.? Especially at the rear trans mount? What intake manifold are you using?
And what is a WCFB clone? Are you saying they are WCFBs, but just not the correct number?
Pics would help.
Plasticman
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Joined: Feb 2006
Posts: 97
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From: Bonner Springs Kansas
The hood hits the top of the air cleaner. The intake manifold is correct. The air cleaner is correct. The fiberglass front end has been supported/shimmed under the radiator core support. I suspect the WCFB cast iron bases are too thick.
Thread Starter
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Joined: Feb 2006
Posts: 97
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From: Bonner Springs Kansas
Unless you have a high-rise manifold or some strange variant of WCFBs they should fit by default - they were stock equipment for the hi-horsepower, non-fuely cars in '61. I run a pair myself with no clearance problems. http://members.capital.net/com/studiog/CarterWCFB/
Has somebody put a big carb spacer underneath the WCFB's to reduce heat exchange ? Pictures would help.
Has somebody put a big carb spacer underneath the WCFB's to reduce heat exchange ? Pictures would help.
Thread Starter
Advanced
Joined: Feb 2006
Posts: 97
Likes: 2
From: Bonner Springs Kansas
on real 2x4 carbs, the carb bases are about 1/4" thinner than a regular WCFB base. that is possibly what the problem is.
however, i have seen clones on many other vettes and saw no problem.
make sure your engine mounting and trans crossmember are correct and installed correctly.
how much room are you lacking?
in the pic you can see the front carb has the wrong base, and the rear carb has the correct base. Notice the height difference between the two carbs.
however, i have seen clones on many other vettes and saw no problem.
make sure your engine mounting and trans crossmember are correct and installed correctly.
how much room are you lacking?
in the pic you can see the front carb has the wrong base, and the rear carb has the correct base. Notice the height difference between the two carbs.
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Thread Starter
Advanced
Joined: Feb 2006
Posts: 97
Likes: 2
From: Bonner Springs Kansas
[QUOTE=Plasticman;1562356031]They sure should work since dual WCFBs were an option in 61. I have dual AFBs on my 62, with an Offenhauser manifold, with 5/16" insulator spacer gaskets, but am not running the stock air cleaner either.
What air cleaner were you using, and are you sure the engine is located at the correct hgt.? Especially at the rear trans mount? What intake manifold are you using?
And what is a WCFB clone? Are you saying they are WCFBs, but just not the correct number?
Pics would help.
Plasticman[/QUOT
Per the previous reply, I'll check the rear trans mount. Your right, the WCFBs are not the correct number, they were supposed to have been
reworked for the Corvette application (the vendors call them clones). I know they won't pass judging, but they appear similar (with an aircleaner) and sell for approx. $1300 less than the correct carbs. I know others have used clone carbs without problems.
What air cleaner were you using, and are you sure the engine is located at the correct hgt.? Especially at the rear trans mount? What intake manifold are you using?
And what is a WCFB clone? Are you saying they are WCFBs, but just not the correct number?
Pics would help.
Plasticman[/QUOT
Per the previous reply, I'll check the rear trans mount. Your right, the WCFBs are not the correct number, they were supposed to have been
reworked for the Corvette application (the vendors call them clones). I know they won't pass judging, but they appear similar (with an aircleaner) and sell for approx. $1300 less than the correct carbs. I know others have used clone carbs without problems.
Racer
Joined: Feb 2003
Posts: 311
Likes: 0
From: Rancho Palos Verdes CA
A trick I used to figure out where the air cleaner is hitting is get some kids playdooh, make a couple of ***** and place around your air cleaner, close the hood as far as you can then reopen, where is the playdooh the thinnest in the front or back of the air cleaner - if in the back - maybe trans mount or carb base or combination of both, if in the front - something else??
Drifting
Joined: Nov 2000
Posts: 1,477
Likes: 4
From: Florida 33460
This is intresting!!
Can somebody tell me wich carbs should i look for to get "correct look" with stock manifold but slightly modified engine ? I am trying to say is there a difference in adjustability with AFBs or WCFB ??
Can somebody tell me wich carbs should i look for to get "correct look" with stock manifold but slightly modified engine ? I am trying to say is there a difference in adjustability with AFBs or WCFB ??
Race Director
Joined: Jun 2006
Posts: 17,901
Likes: 751
From: Inverness FL
St. Jude Donor '07
you could try this to get an idea if it would solve the clearance problem by simply swapping whole carb positions (front to back, back to front)
Bill
Burning Brakes
Joined: Oct 2004
Posts: 953
Likes: 27
I've seen many 1x4 carbs used in cloning the 2x4 setup. I've also seen many AFB's with adapters on original manifolds. Some 1x4 carbs have slightly larger venturis. Low choke WCFB's(3059's) are also being used as clones. They have slightly bigger throttle bores etc.
I have used both real and clone carbs on my '57 at the Pure Stock Drags. The clones were 2505 '57 1x4 carbs. After getting the jetting correct in both applications using an A/F meter, I saw no difference in performance, driveability or ET's. I ran both sets on the same day at the same track. No problems with hood clearance on the clones either. If you're just looking for the 2x4 eye candy, Edelbrock has a 2x4 setup that looks and runs good.
Instructor
Joined: Nov 2005
Posts: 220
Likes: 4
From: Sunderland MA
with a hole saw solved the problem.
Burning Brakes
Joined: Jun 2006
Posts: 765
Likes: 2
From: Hudson North Carolina
There is a difference in the thickness of the base plates between single and 2X4 set-ups. I've seen the thicker bases machined down before. Take it off the intake side if you have too.
