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Cutting up my intake mani and spacers to make 4 ports insteaf of 8

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    #1

    Cutting up my intake mani and spacers to make 4 ports insteaf of 8

    If I were to cut out the sections on my A6 manifold and spacers to make it to where it has 4 oval ports instead of 8 would it make a difference? I know i've seen someone do it on the intake manifold but can't remember who. It's on a n/a engine. I wasn't sure if the amount of time and work I would have to put into it to get it done would be worth it in the end. I also thought about just cutting everything out of the center of the spacer making it just a rectangle. Can anyone tell me any pros or cons of this? I figured there would be less inside the passages to block air but need more opinions. Any help is greatly appreciated. Thanks.
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    #2
    HondaFan81 did this on his white project. Pros for one is more plenum volume. Should also have an improvement in top in while the low end might suffera little. I was going to do it, still might just it's a good bit of material to remove.

    86 4Runner - 22RE 5spd, 4" Lift, 35x12.5R15 BFG Km2's, 4.10 gears
    "The Turtle"
    DD/Trail Rig/Mud Bug

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      #3
      Would doing so affect smog?
      NEW CB



      old Darkcloud : 1990 Accord EX MRT

      new
      DARKCLOUD : 90 ACCORD EX MRT

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        #4
        I knew I had seen someone do it. I also live in Florida darkcloud so smog isn't an issue lol. So if adding a P12 ECU makes a noticeable difference in the bottom end which I already want, and doing this to the intake would increase top end but the low end suffer, would these two mods cancel each other out? I mean I know I would have more hp with the ecu but if it's not noticeable/useable then I won't go through the trouble.

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          #5
          did this on mine takes good amount of time to do it right. Mine was on a turbo car which helped it breath up top , for the most part it will hurt your application for NA car unless you have a fair amount of work done



          GOT BOOST???



          massive part out on accord almost everything is going

          http://www.cb7tuner.com/vbb/showthread.php?t=125294

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            #6
            this is more for a built engine. unless you've had some head work done, i'd just stick with the IAB doulbe stack.

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              #7
              Yeah my engine is stock except for CAI lol. I've been looking for a P12 for a while now but can't ever find one. I'm trying not to get one off of ebay because of the price difference but I may end up having to. Anyways, thanks for the responses/info about it. I guess i'll wait until my engine is making more hp before I do all of that work lol.

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