Carter RBS question

[Anonymous]

My Duraspark II is in and running nicely... now I need to focus on my carb issues. Currently, I'm running a Holley 1940 that appears to be in dire need of a rebuild. Here are the options I'm considering:

1) Holley 5200 from Stovebolt (pro - great carb, well respected rebuilder/seller. con - carb orientation, must fab linkage, must fab aircleaner, hood clearance issues).
2) Carter RBS (1-3/4 inch throttle bore. pro - direct bolt on, "set and forget" carb. con - rebuilt, may have to fab throtte linkage).
3) rebuild my 1940 (is it even worth the effort?).

Cost between 1 & 2 is about the same, assuming I don't have to convert to a cable throttle link. for the RBS. 3 is cheap... but I'm not overly impressed with what I've read about 1940's here on the forum.

Any and all advice is appreciated.

 

[bigcatchdaniel555]

i didnt do anything with my linkage on my mustang to adapt the rbs instead i took the throttle arm shown in the picture and i bent it sideways with a torch so that it would fit right where the original linkage is.http://oldcarandtruckpictures.com/Argentina/CarburettorCarterRBS-a.jpg

like i said before the carb has never given me any trouble and i think most people will agree with me its a maitence free carb. As for the 2bbl i cant say much being i havent tried it.

 

[Anonymous]

I guess what I really want to know is whether the Carter RBS is easier to install, set up, and maintain than the 5200?

Also, how much of an economy/performance boost am I likely to see over my 1940 with the Carter... and would the 5200 be any better in that regard?

 

[Anonymous]

Also - will the stock aircleaner assy. bolt up to the Carter RBS?

 

[kukm66]

What year is your head?

Starting in 1969 Ford went with a wider bolt pattern to accomondate the larger bore. You would have to use an adaptor for the Carter RBS or YF if you have an earlier head. This may influence your decision somewhat.

 

[MercuryMarc]

I am running a 250 and have had all 3 of those carbs on my car....
I am currently running a Carter RBS
I like this the best but had to get the cable linkage off a 74 Maverick at the junkyard.
The 1940 (big bore) worked fine but I wanted a change...
I could not get my 5200's to work (tried 2 different ones) due to bog issues at the idle to main circuit transition and the stalling on left hand turns due to improper orientation.
Not sure if my experience would apply to your 200.

Good luck!

 

[bigcatchdaniel555]

heres a pic of my linkage i used the complete stock setup except i bent the flange on the carb to adapt it to the linkage like i said before for an adapter make your own out of a piece of metal or bore the exisiting heated one, the stock air cleaner worked for me after i took a grinding stone and saned the hole for about 5 minutes. the rbs has a slightly bigger air cleaner hole. also a longer air cleaner bolt will be needed.

 

[bigcatchdaniel555]

forgot the pic...
C:\Documents and Settings\Daniel Blanco\My Documents\My Pictures\Easter 2007\Easter 2007.jpg

 

[CoupeBoy]

forgot the pic...
C:\Documents and Settings\Daniel Blanco\My Documents\My Pictures\Easter 2007\Easter 2007.jpg

email me the picture and I'll host it for you to post on this thread. It wont work from your 'my documents' folder. The post will look fine for you but not for us.

-ron

 

[CoupeBoy]

 

[falcon fanatic]

You left off another option: a holley 350. I noticed that several vendors sell an adapter for the 1-3/4" heads that allow the proper orientation.

 

[bigcatchdaniel555]

not to be rude but where can one get an adapter that correctly mounts the carb facing the radiator i looked before i bought my rbs and couldnt find one i thought about welding a piece onto the summitt adapter and through bolt it for correct orientation but shyed away from it because of fear by a vacuum leak.

 

[JackFish]

Something like this work?

One could fabricate something similar, without the EGR stuff.

 

[Anonymous]

From the responses, it looks like the RBS would work on my 200 if I did the following:

1) took my current mounting flange (i.e. the heater spacer plate) to a machine shop and had the upper side of the hole machined to match the larger bore of the RBS. The end result would be a tapered hole.

2) have the mounting holes of the RBS slotted towards the center of the mounting flange to accommodate the smaller bolt diameter of my head.

3) fab up the throttle linkage.

Point of clarification: The RBS mounting flange has vacuum passages routed into it. So does the existing heater spacer. I doubt that they would line up properly (as they are designed for different applications).

Do I need to worry about these passages?

 

[bigcatchdaniel555]

i dont know because it may vary from year to year on the rbs but on mine the bolts lined right up with the stock 66 head also i'm not sure about the vac passages mine has one on the side and its for the dizzyvacuum. heres a link that may help the guy on this page also used stock linkage

http://www.albertpenello.com/mustang/engine.html