New to Forum:250 carb on a 200?

[Anonymous]

Is this carb exchange doable? If so, would this be an economical way to increase power? If not doable, what would be the most cost effective carb to increase the performance of a stock 200 with headers?

Johndep

 

[Anonymous]

What year is the 200 ?

 

[CZLN6]

Howdy Johndep:

Welcome to the Forum.

The short answer is "YES". A 250 carb onto a 200 is doable and worth the effort in increase performance. The longer more detailed answer will depend on what engine you are working with, which 250 carb you are adapting and what else you might need to do to get the most from the effort. The "What else" takes in linkage, air cleaner, carb base and bolt flange spread, carb bore size in the manifold and throttle bore size in the carb. This will depend on what vehicle you are working with and which 250 carb you are adapting. Pre '67 carb and distributors worked together. It is called the Load-a-matic system. Read Jack's excellent "sticky" explanation at the top of this forum for details.

Is it "economical"? If you have a 250 carb in good serviceable condition and are somewhat handy mechanically, the answer is "Yes". If you have to buy a rebuilt 250 carb from Pony Carb, and have it installed professionally the answer is probably "No". The term "economical" has so many dimensions and interpretations.

If you have a stock 200 with headers, increasing carb is a good next step.

It would be helpful to know details of your vehicle, like other mods, year of head and block, trans, budget, intended use (goals) to be more exact and more helpful to you.

Adios, David

 

[Anonymous]

Thanks for the replies...

Here are the vehicle details:
1976 Maverick 4-door 200 with 3-speed auto, all original. Currently stock. Will be adding headers with dual exhaust.

Intended use:
Street, no racing, no 1/4 miles

Goal:
Looking for easy carb swap that will coax more torque and power from the 200 when combined with headers/dual exhaust.

Budget:
Looking to swap carbs with someone, or minimal investment

 

[CobraSix]

Welcome.

I may have a carb for you, but it probably needs a rebuild (I never actually ran it). It was supposedly rebuilt when I bought it, but who knows. I'll double check when I get home.

Slade

 

[CZLN6]

Howdy back Johndep:

The carb you are looking for is a Carter RBS model. It was used on earlier 250s in Mavericks and Comets. It is rated at 215 cfm. It went into use on the 1970 models and was used to 1973 for sure and later. Sometime after that the 250 got a version of the Carter YF rated at 195 cfm. Your 200 carb should be a Carter YFA rated at 187 cfm.

If you can find an RBS on a Maverick/Comet in the recycle yard get everthing from the air cleaner to the mounting plate between the carb and the manifold. Some models used a low profile side mount system. It is possible your stock '76 air intake system will work with this carb. The cable linkage should be close to a direct swap. These carbs are easy to rebuild. Kits are available at NAPA.

This should be a nice, noticeabe upgrade. You may need to rejet to a smaller main or adjust the metering rod to lean it out slightly. You already have a good, compatible distributor system. A '76 should have a DuraSpark II electronic Ignition system. Set the initial advance at about 15 degrees and gap your plugs at .045" and enjoy.

Adios, David

 

[Anonymous]

In 76 mavericks only had DS 1

 

[Anonymous]

Wow! you guys are awesome! Thanks for all the great answers.

David, thanks especially for the details on the Carter RBS carb, sounds like a "no brainer" swap

There seems to be some disagreement as to if the 76 Maverick has the DuraSpark I or II Ignition system. What is the difference and will it matter much in my situation, Thanks in advance.

Johndep

 

[Anonymous]

Duraspark I has a small distributor cap, and Duraspark II has the large 2 piece distributor cap.

Doug