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A1 , B1 and B2 heads

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    #1

    A1 , B1 and B2 heads

    Which head is better ? I have a 91 LX with a F22A1 bottom end and a F22B2 head with a cast manifold and T3T4 turbo running 9psi , 2.75 in exhaust shop exhaust . I have a chipped ECU running on crome . 255 fuel pump and 450 DSM injectors . I'm planning a new engine build for this winter and need help with an idea I have . I would like to sleeve it , take the displacement down to 2.0 and get the RPM's up to around 9K . At the time that I do the new engine I had planned on changing to the F22B1 V-TEC head because I thought that it would be better for the higher RPM's , but it seems that allot of people here believes the A1 head is better . I have no idea on what pistons , rods , crank would be necessary for this or even if there are any such parts made . It's just an idea for an engine that I have had and I'm starting my research here , with this post . I do plan on lowering the displacement with bore and not stroke as I think it would give me more strength in the cylinder and allow me to run higher boost . As you might have already guessed , I only know enough about engines to get me in over my head . I hope this gets the ball rolling , I figure I have 5 months to get the parts spec'd out and that will put me into cold weather and time for a winter project . I have my flame suit on , so let me know if I'm on the right track or completely going in the wrong direction .
    Tags: None
    #2
    The A1 head is superior by far.
    Its port angles are similar to the F20C, the S2000 engine.

    The B1 and B2 heads I believe had vtec, yes, but were made for fuel economy rather than performance...vtec can go two ways. The don't flow as well either.
    There are no black and white suspension answers!!!!!!!!!!!

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      #3
      Originally posted by mndude07 View Post
      The A1 head is superior by far.
      Its port angles are similar to the F20C, the S2000 engine.

      The B1 and B2 heads I believe had vtec, yes, but were made for fuel economy rather than performance...vtec can go two ways. The don't flow as well either.
      The B1 was V-TEC the B2 ( what I have ) is non V-TEC . I changed heads from the A1 because once I got into the turbo install I realized that the mani I had fit the B heads and not the A1 head . I had to change the head the distributor and go to an external coil to use the turbo I had . I had a complete F22B2 engine I had gotten in trade and I pulled the head and distributor from it in order to complete my turbo install . I also had to use the F22B2 intake mani on the F22B2 head and some other stuff , but I don't know what all of the rest .

      Comment

        #4
        Originally posted by dksix View Post
        The B1 was V-TEC the B2 ( what I have ) is non V-TEC . I changed heads from the A1 because once I got into the turbo install I realized that the mani I had fit the B heads and not the A1 head . I had to change the head the distributor and go to an external coil to use the turbo I had . I had a complete F22B2 engine I had gotten in trade and I pulled the head and distributor from it in order to complete my turbo install . I also had to use the F22B2 intake mani on the F22B2 head and some other stuff , but I don't know what all of the rest .
        I see. You'd still gain more power for your time and money to switch to an A1 head and get a manifold that fits.
        There are no black and white suspension answers!!!!!!!!!!!

        Comment

          #5
          Originally posted by mndude07 View Post
          I see. You'd still gain more power for your time and money to switch to an A1 head and get a manifold that fits.
          I think I'm thinking that already and I still have my A1 head . It's a crap mani anyway . A guy that was here at my shop today noted that my mani wasn't a very good flowing one , it would slow my spool and that it would cause back pressure . He is very knowledgeable about boosted engines and a strong E85 advocate . I had him come down today to discuss an E85 setup for the new engine .

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