Volvo RWD 120-130 Forum

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B18 versus B20 120-130

posted by  someone claiming to be 1bike001 on  Sun Apr 18 14:59 CST 2004 [RELATED]

Hi all. The education continues. Is it a bad idea to spend money fixing a B18? Should I jump to the B20? What are the pros and cons? Also will a header from a B20 fit the 18?

Thanks again.

Steve








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    B18 versus B20 120-130

    uid 14369's pic
    posted by  KLR142 on  Sun Apr 18 17:54 CST 2004
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Mon May 9 12:44 CST 2011
    [RELATED]

    Hey steve, i just posted on your other thread, but i'll repeat here anyway. I'd say make the jump to the b20, there is no reason not to. Plus, you know that it's been rebuilt, AND it is a 74 motor, which is one of the best block/head combinations to start with if you're going for higher performance. And yeah, the header for the FI b20 will be a very good upgrade from your b18s header, but you'll be using it on the b20(hopefully) and all will be good. Good luck again, and you're welcome!

    p.s. Where are you located? Just curious...
    --
    Kyle - attending Ore. State, while my lil 68 142 (74 b20, broken m40) sleeps... (check out my cardomain site, kneedsacar








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      B18 versus B20 120-130

      posted by  someone claiming to be 1bike001 on  Mon Apr 19 00:45 CST 2004 [RELATED]

      Hi Kyle. I'm located in Clackamas, Oregon. Just southest of Portland.








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        Sweet! 120-130

        uid 14369's pic
        posted by  KLR142 on  Mon Apr 19 04:15 CST 2004
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Mon May 9 12:44 CST 2011
        [RELATED]

        It's always good to hear about more people in the area. Will you be going to the IPD garage sale? And so what are your thoughts on what you'll be doing with your engine(s)? Or did you want to wait for more responses before you decide... Always fun to learn about what other people are doing. =D

        --
        Kyle - attending Ore. State, while my lil 68 142 (74 b20, broken m40) sleeps... (check out my cardomain site,kneedsacar








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          Sweet! 120-130

          posted by  someone claiming to be 1bike001 on  Tue Apr 20 02:21 CST 2004 [RELATED]

          Well I have bought a complete second B18 with tranny. Today I buy a complete 74 144 with B20 rebuilt but sitting 11 years and just yeaterday I found a complete B20 and a J type tranny and I think both may have come out of the 1800 series. Ive got to see if that can be traced through numbers on the block and tranny. I know I'm at least buying the tranny.

          I may put the 74 B20 in my 72 142. The 72 runs ok but has a lot of lifter noise. Not real bad just more than I'm use to. Not sure about the 122. I do like the idea of getting the max MPG. Premium here in Portland is about $2.12 right now..............

          And I absolutely will be at the garage sale. Too many cars and parts to pass up.

          Steve








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    B18 versus B20 120-130

    posted by  walrus3 on  Sun Apr 18 15:15 CST 2004
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Mon Dec 2 14:20 CST 2013
    [RELATED]

    The header will fit.
    The B20 gives you 200cc more piston displacement and better possibilities
    of cylinder heads. The B20 combustion chamber is too big for the B18
    unless you bore it out to 3.5" and that is about as big as you want to go.
    You can go to 3.622 or more with the B20 block. The B20 heads (at least
    3 different ones) come with bigger valves and MUCH better valvestem seals.
    They usually had bigger oil pumps also. Nearly all the parts from the
    6-bolt versions bolt together OK and quite a few from the 8-bolt (74-75)
    versions will work in the right combinations.

    I much prefer the B20 because it gives you a headstart on better performance.
    --
    George Downs, Bartlesville, Oklahoma, Central US








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      B18 versus B20 120-130

      posted by  someone claiming to be Joaquin Novara on  Sun Apr 18 15:30 CST 2004 [RELATED]

      Hi.

      You can use a bit less gasoline with the B18. You have more power with the B20. If you want a daily conmuter B18 are ok. If you like to ride use B20. On USA B20 parts are more available than B18. Due costs, boring a B18 to B20 is not a good option (but was popular years ago).

      I use a B18A on my 121, with only one carburettor ZS175 and no overdrive (non the more popular or best Amazon configuration, but I´m happy with it).

      Joaquin
      Rojo 121 Amazon
      Lima Peru






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