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  1. #26
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    Click here to enlarge Originally Posted by EUGENE-Taiwan Click here to enlarge
    stay tuned ! think you will see numbers real soon
    i can't wait
    F10 M5 : ??????
    E90 M3: 11.2 126.7 with a 1.8 60ft Street Tires, Stock Interior,DSC on

  2. #27
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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    6xxhp on 8-9 psi? sounds about right..
    you really bring dusty threads into attention.

  3. #28
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    Click here to enlarge Originally Posted by Sorena Click here to enlarge
    you really bring dusty threads into attention.
    We have plenty that deserve more attention than they have received.

  4. #29
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    We have plenty that deserve more attention than they have received.
    +1
    F10 M5 : ??????
    E90 M3: 11.2 126.7 with a 1.8 60ft Street Tires, Stock Interior,DSC on

  5. #30
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    “Those who do not learn from history are doomed to repeat it”-George Santayana



    same people are trying to pull the same old tricks. its funny, the log says 8.9, but that cant be accurate,- of course not, it has to be less boost, but the "files" are corrupt so they cant prove it :rollseyes:

  6. #31
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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    “Those who do not learn from history are doomed to repeat it”-George Santayana



    same people are trying to pull the same old tricks. its funny, the log says 8.9, but that cant be accurate,- of course not, it has to be less boost, but the "files" are corrupt so they cant prove it :rollseyes:

    very true +1 i like the sig.
    F10 M5 : ??????
    E90 M3: 11.2 126.7 with a 1.8 60ft Street Tires, Stock Interior,DSC on

  7. #32
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    Click here to enlarge Originally Posted by img Click here to enlarge
    Been reading about lots of blown motors due to Supercharging,don't know if thats true or not but was wondering whats the max boost we can run with 10:01 compression ?
    Also whats the max boost a stock S65 motor can handle ?
    This is a really open ended question...

    The S65 is 12:1. You could lower the compression to 10:1 with a set of dished pistons. Lowering the compression means you'd also want to change your cams to optimize power.

    For simplicity's sake let's just say you're running a stock S65 with stock compression, cams, etc. There's more than just peak boost. You also have to look at the supercharger itself. What RPM is the compressor making peak boost at? Are you over spinning it, beyond its efficiency range? 10psi from supercharger X may not yield the same HP as 10psi from supercharger Y, depending on how hot the air is, how hard the blower is spinning, etc. Hotter air means the intercooler (if there is one) may get saturated sooner. Also, how much pressure drop is there between the output side of the supercharger and the at the engine intake? You could be losing 2 or 3 psi across the intercooler piping, etc. I've seen some setups where there are separate boost gauges for each location.

    Also, are you running unleaded street gas/race gas, leaded race gas, methanol, or leaded race gas? Are you running stock engine management, a standalone, etc? Stock injectors? Stock fuel lines and fuel pumps?

    And most importantly: Are you going for all out power without regard for durability? As in, do you plan on rebuilding your engine after every race season? Or is this a street car meant to run reliably in hot weather, etc? All of this has to be accounted for.

  8. #33
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    Click here to enlarge Originally Posted by fstop7 Click here to enlarge
    This is a really open ended question...

    The S65 is 12:1. You could lower the compression to 10:1 with a set of dished pistons. Lowering the compression means you'd also want to change your cams to optimize power.

    For simplicity's sake let's just say you're running a stock S65 with stock compression, cams, etc. There's more than just peak boost. You also have to look at the supercharger itself. What RPM is the compressor making peak boost at? Are you over spinning it, beyond its efficiency range? 10psi from supercharger X may not yield the same HP as 10psi from supercharger Y, depending on how hot the air is, how hard the blower is spinning, etc. Hotter air means the intercooler (if there is one) may get saturated sooner. Also, how much pressure drop is there between the output side of the supercharger and the at the engine intake? You could be losing 2 or 3 psi across the intercooler piping, etc. I've seen some setups where there are separate boost gauges for each location.

    Also, are you running unleaded street gas/race gas, leaded race gas, methanol, or leaded race gas? Are you running stock engine management, a standalone, etc? Stock injectors? Stock fuel lines and fuel pumps?

    And most importantly: Are you going for all out power without regard for durability? As in, do you plan on rebuilding your engine after every race season? Or is this a street car meant to run reliably in hot weather, etc? All of this has to be accounted for.
    Really nice answer but this is an old thread and he already made his decision to go with ESS and now ESS is the greatest thing in the world and all that.

  9. #34
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Really nice answer but this is an old thread and he already made his decision to go with ESS and now ESS is the greatest thing in the world and all that.
    on paper, not so much with realworld results Click here to enlarge

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