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How to read compressor maps for beginners

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  • How to read compressor maps for beginners

    A simple method for reading compressor maps.


    Last edited by TheMU47; 02-04-2018, 01:39 PM. Reason: pic was too small
    LSJ powered 1998 Chevy S-10 turbo
    visit my Albums - http://sixthsphere.com/album.php?u=7267

  • #2
    Here’s an example of a small turbo


    Last edited by TheMU47; 02-04-2018, 01:39 PM.
    LSJ powered 1998 Chevy S-10 turbo
    visit my Albums - http://sixthsphere.com/album.php?u=7267

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    • #3
      For your calculations of engine efficiency, use this basic concept to get a decent idea of your engine VE;

      Typical volumetric efficiency for a stock/street engine is 80-85%,
      85-90% for mildly modded engine (like I/H/E) and 90-95% for a well built heavily modded engine (like cams, ported head - you get the idea, increases in airflow). This does not include race engines, which can achieve 100%+ (at certain rpm ranges)
      Single cam 2 valve engines use the lower number, 4 valve dual cam engines use the higher number.
      LSJ powered 1998 Chevy S-10 turbo
      visit my Albums - http://sixthsphere.com/album.php?u=7267

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      • #4
        Blurry pictures are blurry
        72 Charger: pissed me off, on jackstands.
        95 SW1m: Dohc swap. DD. I can haz boost?

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        • #5
          They’re clear for me. *shrug*. iPhone zooms right in.
          LSJ powered 1998 Chevy S-10 turbo
          visit my Albums - http://sixthsphere.com/album.php?u=7267

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          • #6
            They are were blurry for me if i clicked view image. If i followed link to storage page, they are clear.
            It's not my fault, blame the radiation.

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            • #7
              Fix it then. It’s pretty important to be able to read that information.
              LSJ powered 1998 Chevy S-10 turbo
              visit my Albums - http://sixthsphere.com/album.php?u=7267

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              • #8
                It works fine, nothing to fix. Need to follow link to image to view it is all. Tapatalk only shows an enlarged low res view of thumbnail, or so it seems.
                It's not my fault, blame the radiation.

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