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hf pistons valve releifs?

Discussion in 'Engine Building' started by ryangt, Jan 22, 2005.

  1. ryangt

    ryangt Senior Member

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    im going to start a mini me on my hf bottom end just using a dx head and what not to make some power. Theres an article on here abotu making a monster hf swap, and i wanted to know if the stock hf pistons have 8 valve releifs or no valve releifs?? the article says the head can go right on , but a 16 valve head and pistons with 8 relifs wouldnt exactly jive right.
    so does anyone know what the stock hf pistons have for valve releifs?
    thanks
     
  2. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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  3. ryangt

    ryangt Senior Member

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    thast weird i just cant imagine honda putting 16 valve relifs on pistons in a known 8 valve motor, i guess i could take my head apart but i dotn want to do all that then find out the freak swap wont work.

    thanks for that link buddy
     
  4. biglee414

    biglee414 Senior Member

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    Hey man, I have the same question, what year is your hf? And if you do end up just taking off your head, let me know, just pm or im me.
     
  5. ryangt

    ryangt Senior Member

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    my hf is a 90 is the d15b6 motor
     
  6. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    It could just be a cost thing... cheaper to buy a ton of PM3 pistons and just stuff them into B6 blocks as well as B2 blocks. If it works, why not? I'm still searching though- I want to find this out too.
     
  7. ryan89crx

    ryan89crx Senior Member

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    im probably going to be pulling the head off my HF today so ill let you know what i come up with.
     
  8. ryan89crx

    ryan89crx Senior Member

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    ok, i got bored so i got out to the garage and pulled the head off. heres what i found....2 valve reliefs per piston, btw this is out of an '89 HF
    [​IMG]
    [​IMG]
     
  9. ryangt

    ryangt Senior Member

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    so the hf monster thread is bullshit or has someone actually done it ? it says nothing about replacing pistons
    oh btw thanks for doing that Ryan nice buildup on the block hahah those pistons are gay im embarassed that they are in my car now hah. who cares about the 50mpg if your pistons look gay
     
  10. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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  11. ryangt

    ryangt Senior Member

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    so ok the head swap wont work so pr3 pistons are in order now? wil lthose go straight in? the bore and connecting rod width and all that
     
  12. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Sorry- that should be PM3, not PR3. PM3 is the D15B2 piston- PR6 is for a B16. The PM3s should drop right in and slide onto your stock rods.
     
  13. ryangt

    ryangt Senior Member

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    thanks man. Your a big help as usual to the junk yard i go!
     
  14. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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  15. ryan89crx

    ryan89crx Senior Member

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    thanks for the credit in the article. ;) :thumbsup:
     
  16. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Of course I'd give you credit- it wouldn't be too cool if I didn't especially since you did all the work. The only reason I had to post it up is because I can't "copy" a post from one thread to another. If I could do that, I would have just copied your post into a new thread in the articles section.
     
  17. Crix

    Crix Senior Member

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    so the pistons will need to be changed out? To PM3's? Which do these come out of? Block?
     
  18. ryan89crx

    ryan89crx Senior Member

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    the dx motor, d15b2
     
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