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High Compression Pistons (for C5)

Discussion in 'Engine Building' started by ek9r, Sep 18, 2003.

  1. ek9r

    ek9r Senior Member

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    im leaning toward a set of Rollerwaves 12.5:1 just wondered if anybody here is running them now and can tell me of the pros + cons? Also what else would be a good choice for me. Its a definate that i will be building my bottom end now that the summer is over so any help or stories you have would be great to hear!
    my setup as of now:
    00' B18C5 USDM
    Jun 3 Cams
    Jun 4-1 Ex. Mani
    RC 310cc injectors
    AEBS Intake Mani
    Ericks Racing Custom OBD1 ecu
    Type r LSD trans

    Oh yeah, this is not a daily driver, but dont want to have to run higher
    than 93 octane all the time
     
  2. honda_mach3

    honda_mach3 Senior Member

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    A lot of pings and pongs. knicks a lot. quiets down when warm. low valve to piston clearance, bad GM. good power output.
     
  3. JDMilan

    JDMilan Senior Member

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    Get the rollers...seen them in a box, seen them run in an ITR 2.0 built by pacific performance down here in florida and helped install them. They do hand sand the edges down to minimize detonation, etc..


    I would go with 12 flat CR, going higher you need to finer tune things out, no saying you can't do it but I like to have some leigh way inbetween that.
     
  4. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    I ran 12.6:1 Rollerwaves in my B20, and am running even more agressive Rollerwaves in my GSR. I love them. Great power, not too noisy unless you get the partial skirt high pin model, easy to tune.
     
  5. ek9r

    ek9r Senior Member

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    do you think running my setup with type r fuel pump and some 12.5:1 CR pistons i would be too lean w/ 310cc injectors?? if so which fuel pump do you recommend? i already have aem fuel rail w/ fpr. Right now i am running wayyy rich and have the fuel pressure @ 35psi, and Vafc like -48136.61 across the board :spin:
     
  6. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    You won't lean out 12.5:1 pistons on 310cc injectors. Those are the size that I run. I'm running the Walbro 255lph pump, but you'll probably be ok with the Type-R unit too. I don't know how much it flows, but I know I've seen the information on a board somewhere.

    Turn your fuel pressure down if you're running too rich. I ran mine at 40psi though, with a Mugen program and the VAFC set not too far off zero, so I don't know how you're running too rich.
     
  7. ek9r

    ek9r Senior Member

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    yea last weekend we used a Motec tuning system and at -8 correction and -6 through peak powerband, it was still reading rich. I need some dyno time badly seeing that the motec was only a "quick fix" at best.
    Has anyone had experiance with JE pistons? they were my next choice.
    Thanks Calesta for the info!
     
  8. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Weird... but you're welcome. :thumbsup: Everyone's tuning is different anyway.

    I don't have any direct experience with the JE pistons.
     
  9. ek9r

    ek9r Senior Member

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    Does anyone else have some input for me? I want some feedback
     
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