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b18a / b18b pistons

Discussion in 'Forced Induction' started by gatto-is-alive, Nov 23, 2010.

  1. gatto-is-alive

    gatto-is-alive New Member

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    i was wondering to to buy some ls pistons for a b16 to lower the cr for turbo setup
    but the guy that i was dealing with told that they wont fit the b16 ???

    WHY???

    b18a or b18b have the best pistons for a low budget turbo setup and i dont wanna get too much boost 8 to 10 maybe 12 psi dont see how they wont fit


    :confused:any help is very helpfull
     
  2. hondafreak513

    hondafreak513 New Member

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    they should fit. if you can put b16 in a ls then you should be able to do the same by putting ls pistons in a b16. if anyone else knows chime in...
     
  3. gatto-is-alive

    gatto-is-alive New Member

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    he told me that they fit only on 1.8lt b18a b18b 16v vtec maybe he is not on the mechanic level and he's just a seller !!
     
  4. gatto-is-alive

    gatto-is-alive New Member

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    [/attach][/attach][/attach][/attach][/attach][/attach]

    i have currently the pct s in my block but i had the pr3 s as oem
    the sizes on these pics are telling that they fit

    but note the valve pockets accurately between the pr3 and the pr4

    when you make an ls vtec u dont have to change pistons !
    so the pockets must be enuogh to suit the extra lift for the vtec

    right?
     

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  5. gatto-is-alive

    gatto-is-alive New Member

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    has anyone tried it before?

    i thought that all the b16 and the b18 pistons where interchangeable
     
  6. hondafreak513

    hondafreak513 New Member

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    they are, its just the b16 will give a higher compression and the b18 will yeild a lower compression. you might have to change the rods but im not to sure. Which exact motor do you have cause you might be fine with whats in it for turbo, you can run up to 10:1 for turbo you just need a certain turbo for higher compression and won't need as much boost to make good power for what you what. how much power are you trying to make. if you want a shit load of power and run high boost then yes you will need lower compression. most of it just determines which block and head you are running.
     
  7. gatto-is-alive

    gatto-is-alive New Member

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    these pistons will make some thing like 8.5 - 9.0 :1 in the b16a1

    looking somwhere around 275 to 300 horses depending on tuning!
    using garrett t28 turbo on a log manifold, 460cc injectors ...
     
  8. gatto-is-alive

    gatto-is-alive New Member

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  9. hondafreak513

    hondafreak513 New Member

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    what block and head are you using???? is it a complete b16a block and head??
     
  10. gatto-is-alive

    gatto-is-alive New Member

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    b16a1 block and a b18c1 gsr head
     
  11. hondafreak513

    hondafreak513 New Member

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    so ok then your compression should be close to 10:1 yeah i would lower it down to 9.5:1 or a little bit lower but i wouldn't got to low. with a t28 you wouldn't need 8.5:1 compression.
     
  12. gatto-is-alive

    gatto-is-alive New Member

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    just found that you neen to machine the valve pockets and narrow the rods to put ls pistons in a b16a
    ok my rods are allready done due that i have r pistons i my engine but the valve pockets!!!!!
    no too much hassle

    now found on ebay nippon racimg low compression pistons for b16
    talked with the guy and these seem that are machined allready to fit it
    good priced for a low budget build and the quality is good the pct's i have are the same brand and bought from the same guy too so i think i go fer em!
     
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