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Question: F22A1 Vtech

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    #1

    Question: F22A1 Vtech

    What would it take to add vtec to a F22a1? If the heads were changed out to f22b's, vtec wiring & controller installed, what else would be needed to make an f22a1 vtec? What are the pro's / cons, and how much hp/tq could be gained from this? And no I do not wanna hear about it would be better/cheaper to swap in an h22. This is a technical question.

    Any input on the subject would be appreciated.
    Last edited by cloudasc; 05-04-2007, 06:13 PM. Reason: Title Fix Vtech to vtec
    PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

    Tags: None
    #2
    i don't think the gains would be real noticable. for all the trouble of swapping heads and whatnot i would suggest doing a h23 or f22b dohc head swap. you will see gains and not have to convert to obd2 or any of that business. i think if you are to convert to obd2 at least a f23ax or a h22a4. good luck bro.
    hey. my cb7 has morphed. haha.

    Comment

      #3
      f22a4 to f22b1 vtec swap - CB7Tuner Forums
      http://www.cb7tuner.com/vbb/showthread.php?t=63427&highlight=f22a+vtec+swap
      Any questions regarding performance, maintenance, or repair belong here. If you want to go fast, or just change a flat... this is the place to ask!

      on the stairs, she grabs my arm, says whats up,
      where you been, is something wrong?
      i try to just smile, and say everything’s fine.

      Comment

        #4
        Originally posted by cb7rolln
        i don't think the gains would be real noticable. for all the trouble of swapping heads and whatnot i would suggest doing a h23 or f22b dohc head swap. you will see gains and not have to convert to obd2 or any of that business. i think if you are to convert to obd2 at least a f23ax or a h22a4. good luck bro.
        So it isn't that big of a deal to convert a sohc f22a1 to a f22a1 with f22b or h23a1 heads and make the f22a1 a dohc engine?
        PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

        Comment

          #5
          1. You spelled vtec wrong.
          2. Its not worth it for not even that much a bump in horsepower.

          The New-ish Ride
          My old Ride
          Hear my Vtak!!!
          MK3 Member #3
          I piss off people for fun.
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          Comment

            #6
            The F22A head is much better than the F22B1 head. SOHC VTEC is a gimmick at best.


            As for DOHC, for the price you'd pay to do it right, and still have a potentially unreliable motor, it'd be both cheaper and easier to just buy a DOHC motor. The F22B DOHC is fairly inexpensive.


            Headswaps are fun projects. They aren't great for daily drivers.






            Comment

              #7
              Originally posted by NAiL05
              1. You spelled vtec wrong.
              2. Its not worth it for not even that much a bump in horsepower.
              Hey thanks, I fixed the typo. I was really *tired* when I started the thread.

              What about fuel economy? Would it offer any benefit in this department?
              PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

              Comment

                #8
                No benefit in fuel economy... if anything, worse.






                Comment

                  #9
                  So...

                  then what would be a good head swap for a f22a1 that would increase hp/tq, and increase fuel economy. And what would their realistic gains be on a stock motor?
                  PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

                  Comment

                    #10
                    vtec or VTAK is fine
                    **Blk Housed Slut Crew Member #1**

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                    Da Drizzle's Sedan - Dr. Diy's Blk Housed Thread
                    '90 2Tone Coupe-Car Heaven_'89 Lude-Junk Yard
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                    Comment

                      #11
                      The H22 headswap would be the most productive... but still, the F22A1 bottom end can only rev so high. You'd miss out on half of the powerband created by the H22 head.

                      Honestly, a headswap isn't a good idea. Others will tell you differently, but I've seen more fail than succeed.






                      Comment

                        #12
                        If you want to boost your power your better off with the normal DOHC h23/F22B dohc head swap. The stock F22A1 can make good power with some add ons from delta/a6 mani/chipped 06 and sicne bisi is one of the leading F series supporters. SO the F22A1 is not a bad platform.

                        The New-ish Ride
                        My old Ride
                        Hear my Vtak!!!
                        MK3 Member #3
                        I piss off people for fun.
                        IA 08 Sunburn Victim #1

                        Comment

                          #13
                          Your best bet is to stay with a full motor... The F22A1 can make some decent power NA, and it does really well with boost. That, or swap in an F22B DOHC or H22 (or another upgrade... just stay the heck away from the F22B and F23 SOHC motors!






                          Comment

                            #14
                            So it would be better to leave my stock heads, and change the pistons to something like Bisimoto spec F22A shelf pistons?
                            PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

                            Comment

                              #15
                              The F22 bottom end can rev just as high as the H...

                              Especially on a stock head.

                              You only need to get to about 7500 to get passed the power peak of an H22 head.

                              Comment

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