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Thread: Compression vs. Boost

  1. #1
    Join Date
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    Compression vs. Boost

    So what do you huy's think is better, more boost less compression or a little more compression and less boost. All things being equal to get the same power output out of both setups.
    2006 Silverado
    Little Black Bitch

  2. #2
    If its primarily a street vehicle, I would run the most compression I could that would still allow me to hit my power goals on the chosen octane under boost in the given app. That would give you a more responsive engine out of boost, also more efficient. But, by going on the lesser compression side you have way more room for error with the tune under boost, less chance of timing being pulled and you have the capability to make more overall power with the fuel being the limiting factor. Its all about the particular combo in ? and what your after....
    Gen I Viper

  3. #3
    ff_jeff Guest
    Quote Originally Posted by ATX ENGINE MAN View Post
    If its primarily a street vehicle, I would run the most compression I could that would still allow me to hit my power goals on the chosen octane under boost in the given app. That would give you a more responsive engine out of boost, also more efficient. But, by going on the lesser compression side you have way more room for error with the tune under boost, less chance of timing being pulled and you have the capability to make more overall power with the fuel being the limiting factor. Its all about the particular combo in ? and what your after....
    werd. imo low 9's in the compression ratio is prob best. A lot of high power guys go in the 8's but like he said. Leave some room for error. You can always turn up the boost. But you cant turn down the compression.

  4. #4
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    Here comes the great debate...
    Gone, but not forgotten!

  5. #5
    boost
    99RCSB Broke because I wasted thousands and thousands of dollars on my truck.

  6. #6
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    compression should match intended boost level ........... done.
    2002 Tahoe 4.8 - soon to be turbo'd - SOLD
    1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
    2012 Raptor - 497rwhp at 10psi
    If you aint breaking - you aint going fast enough

  7. #7
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    Quote Originally Posted by SCIV View Post
    Here comes the great debate...
    that was the point
    2006 Silverado
    Little Black Bitch

  8. #8
    Join Date
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    Quote Originally Posted by sleeper1500 View Post
    that was the point
    Get this months GM High-Tech Performance mag. There is a great article dedicated to this exact topic.

    PS - I tried to get it off the web, but couldn't.
    Gone, but not forgotten!

  9. #9
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    There is no answer to this question

    Too many variables.
    static compression
    dynamic compression
    aluminum or iron heads
    intercooler or no intercooler
    type of intercooler
    fuel
    tune
    boost level.
    compressor efficiency
    ect
    ect
    ect.
    2002 Tahoe 4.8 - soon to be turbo'd - SOLD
    1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
    2012 Raptor - 497rwhp at 10psi
    If you aint breaking - you aint going fast enough

  10. #10
    Quote Originally Posted by r.barn View Post
    There is no answer to this question

    Too many variables.
    static compression
    dynamic compression
    aluminum or iron heads
    intercooler or no intercooler
    type of intercooler
    fuel
    tune
    boost level.
    compressor efficiency
    ect
    ect
    ect.
    + 1
    99RCSB Broke because I wasted thousands and thousands of dollars on my truck.

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