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Ls/Vtec & Crv/Vtec Build Question

Discussion in 'Engine Building' started by eicivic, Dec 14, 2005.

  1. eicivic

    eicivic Senior Member

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    I have a question about building a ls/vtec but boring the block to 84mm. So basically like the crv/vtec.
    My question is it okay to run the crv/vtec (B20/B16) pistons that wiseco and Je make. It would be low compression and it would have some huge turbo cams. I know that its known that the valve reliefs for the b16 and b18a/b are different so this is why i ask.

    BTW: The block will be sleeved by darton.


    Thanks in advance!
     
  2. pissedoffsol

    pissedoffsol RETIRED

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    yeah, it can be done... its just like slapping a stock b20 with a stock b16 head on it...
    you'll get a bump in compression from it due to the deck height
     
  3. eicivic

    eicivic Senior Member

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    How many points of compression will be gained? And my other question is hard to explain but i am needing a logical answer.

    The timing gears dont match up 100%. Somehow its 1/2 a tooth off. And trust me its only half a tooth or littl less. But its not a whole tooth.

    I have the right parts

    P72 Timing Belt
    P72 Water pump (22 tooth)
    P72 Tensioner
    ITR Oil Pump
    B18a Block bored to 84mm
    B16A1 Head

    Something is fishy.... Running the crv/vtec wiseco low compression pistons w/ crower billett rods.
    The wiseco LOW compression pistons and got 185 compression accross the board when i did the compression test with 0 miles on it. I am running the total seal gapless rings tho... so i dont know.

    Theirs no different on the cam gears for DOHC vtec and DOHC non vtec so im lost........



    What do i do? It runs, It idles, and i know the timings off cause it will have a little miss/cutout when not under a load and just slowly reving it up. I do have 390 miles on it and no major problems and it has seen 1bar. :mrgreen:
     
  4. drpenguin

    drpenguin Senior Member

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    well if you have adjestable cam gears then make them fit. if not get some caue you will need them on that serious of a build
     
  5. eicivic

    eicivic Senior Member

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    Yea, i have some fidanza cam gears already. I was just wondering what could cause the situation i have. I have some BIG cams that were custom by web camshafts. So i will have to degree the engine to install the cam gears correctly and make sure that when the belt lines up that it will be at the correct degree.

    Thanks.
     
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