Carburator Question...

Discussion in 'Technical' started by my71comet, May 5, 2004.

  1. my71comet

    my71comet Member

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    ..I was wondering if a stock carburator off of a 250 Cu In will work on a 200? I am going to swap out the dying 250 for the strong 200. Lots of work, but I'm game. Just need to know if they will interchange.

    Thanks :confused:
     
  2. 71gold

    71gold Frank Cooper Supporting Member

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    i would say "yes". i am running a 170 ci. head on my 250 ci. motor and a 250 ci. carb....j.m.o....frank...
     
  3. my71comet

    my71comet Member

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    Cool so I don't have to worry about trying to track one down. Those things are getting hard to find. The 250 intake in permently connected to the head so I have heard. I am not sure all of what I will have to change to make the 200 work in the 250's spot, but I know its just a few small things. Thanks Frank.
     
  4. mike75mav

    mike75mav Member

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    I had a 200 in my 70 mav. When I changes to a 250 I found out the carbs are not interchangeable. The mounting base of the carb is differant on a 200 than a 250. The 250 came from a 75 mav. The bearer of bad news. Its time for junk yard shopping again. Good luck
     
  5. my71comet

    my71comet Member

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    Well I suppose there may be an alternative, could I take the 250 head off and put it on the 200 so i dont have to go out and try and find a carb for a 200?
     
  6. mike75mav

    mike75mav Member

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    I don't know if it works. I never done it. I'm guessing yes it should. Worse case I can help you in finding a carb for it. Just a thought.
     
  7. mike75mav

    mike75mav Member

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    A second thought. Thats right on the bell housing also I found out when I did it is the fly wheel and torgue converter was one piece. You would have to get a torgue converter for a 250 and fly wheel. Also the starter is differant. I learned the hard way on this. Didn't know it until its to late. I think I have the parts you need. Call me at 360-308-0422. Since you are close I could help out some.
     
  8. my71comet

    my71comet Member

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    Right On!

    I am in Olalla actually. Do you have a spare block or anything of that nature. I could easily come out there even with my knocking motor, and check them out. It doesnt seem to affect the car. It just knocks and the car just cruises along like its not even happening. I know it is because it annoys the crap out of me and I am afraid its going to cost the engine, but I don't have any other vehicle to drive at the moment..and I don't wanna drive a minivan. Thanks.
     
  9. scott

    scott Member

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    awwwww just get a 302 and be done with it!!!!!!!!!!!
     
  10. my71comet

    my71comet Member

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    A 302 would blow the doors off of most imports on the road. That would be cool. I just don't want to change anything right now. A good built 250 could also do the same thing. A 200 is an okay engine, just not a very powerful engine at the stock build.
     
  11. Fearmont80

    Fearmont80 Member

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    Doesn`t the 302 use the same convertor/bellhousing as the 250? So if your going to put a 250 in it.....you might just as well put a 302 in it.
     
  12. my71comet

    my71comet Member

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    Same bellhousing yeah, but I would have to change a lot of things under the hood, and with this car being my daily driver, I kinda need to find the cheapest, fastest way to get the car good. I know the 250 doesn't have as much power as the 302 by a long shot, but I like the fuel economy of the 250 and the 302 is not as good on gas because of the 2 extra cylinders. I will however eventually change it over to a 302, but it will be while down the road. If anyone knows the cheapest way to do a 302 conversion let me know...andy ideas at this point.

    Thanks.
     
  13. PaulS

    PaulS Member extrordiare

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    You can use the 250 head on the 200.... BUT you will lose some compression. The loss in compression can be corrected with flat top pistons or better yet pistons with a 5cc dome. (from early 200 engines) The valves are bigger in the 250 and the chambers are too, which will give much better breathing. If you don't have money for headers then use the 250 exhaust - it is a slight improvement over the 200 inch exhaust manifold. You can also build an adapter to mount the 250 carb on the 200 head, but the linkage is going to have to be rigged to work and the carb may have to have the jets replaced with two sizes larger on the smaller engine.


    PaulS
     
  14. relic

    relic -mavy ridin-

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    cheap way to do a 302 conversion..... buy mine? :)
    i have a 302 in my 74 mav right now and lookin to get a brand new motor dropped in eventually. so u can buy mine :p
     
  15. elliot

    elliot Member

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    what year is the 200 that you`r putting in it and what year is the 250 thats in it now ? some of them use the same head and carb .
     

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