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  1. #1

    r&D Pistons Higher Compression......

    anyone seen the new r&d pistons?? they have higher compression...9.5:1

    and they are only $872...haha


  2. #2

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    Quote Originally Posted by allstar71 View Post
    anyone seen the new r&d pistons?? they have higher compression...9.5:1

    and they are only $872...haha
    Yeah...I got the email.
    Attached Files Attached Files

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    Sooooooooo..........are these JE or Wiseco's or someone else?

    Can we get oversize?

    And, NO WRIST PINS!!!!!!!!! Use the oem pins??

    When you pull your wrist pins out you may be surprized at the level of degradation of the wear surfaces due to lack of oiling. I'd take a photo if my camera wasn't so sucky at close-ups.

  4. #4
    32 Valves To Love! Racecar_Dave's Avatar
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    JE will make you ANY piston you want, you just have to give them the details. I had 8 made for my BB cobra and it was only $600, so if R&D is trying to get you to pay $900 for 4, I would go directly to JE

  5. #5
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    Quote Originally Posted by Racecar_Dave View Post
    JE will make you ANY piston you want, you just have to give them the details. I had 8 made for my BB cobra and it was only $600, so if R&D is trying to get you to pay $900 for 4, I would go directly to JE
    I would agree.

  6. #6
    Taking money away from the Z06 Fund
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    I'd also recommend CP pistons. They were formed by ex JE engineers and make a very good product.

    As for higher compression, you will make more power, but running higher boost #s will require more fuel with the higher compression and you won't be able to run as much timing. This topic has been argued over and over with the Car world on whether to run lower compression, more timing and more boost or higher compression, less timing and less boost, etc.

  7. #7
    32 Valves To Love! Racecar_Dave's Avatar
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    On a supercharged ski I cant really see the upside of HC but on a turbo motor it will GREATLY reduce turbo lag; meaning you can run a bigger turbo that pushes more CFM at lower boost than a smaller unit would with higher boost.

  8. #8
    Taking money away from the Z06 Fund
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    Good points on the Turbo motors and compression.

    Also, something to think about/remember, the SHO blowers are centrifugal, meaning they produce most of their boost at the upper RPM range, so more compression at higher RPMs is running the engine on the jagged edge at 8K plus RPMs and higher boost.

    You will get more down low torque on higher compression pistons before boost builds up, but the danger zone happens in the upper RPMs.

  9. #9
    32 Valves To Love! Racecar_Dave's Avatar
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    Quote Originally Posted by poof100 View Post
    Good points on the Turbo motors and compression.

    Also, something to think about/remember, the SHO blowers are centrifugal, meaning they produce most of their boost at the upper RPM range, so more compression at higher RPMs is running the engine on the jagged edge at 8K plus RPMs and higher boost.

    You will get more down low torque on higher compression pistons before boost builds up, but the danger zone happens in the upper RPMs.

    +1

    HC on a SC (even a roots design) will yeild more danger than performance.

  10. #10
    32 Valves To Love! Racecar_Dave's Avatar
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    Now you could get JE to cut you some LC pistons and crank the boost as high as the stock block can handle.

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