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  1. #1
    Hooah_Killer's Avatar
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    HP gains, I'm just curious

    So with all the mods we do, what are the actual HP gains we see. And for every x amount of rpm = x? of hp

    Riva or similar intake
    Riva free flow exhaust (07)
    Riva water box
    I/c reroute
    1:1
    1.05:1
    head porting
    6 degree timing mod
    09 pistons/cams = 10hp
    rogue cams
    j/e pistons
    ecu with the above mods
    Last edited by Hooah_Killer; 09-25-2009 at 01:38 PM. Reason: added stuff


  2. #2
    Hooah_Killer's Avatar
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    Ok surely there is an answer to these it doesn't hAve to be exact

  3. #3
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Im sure you could do some calculations based on 250 hp at x horespower and rpm, then use a calculator similar to a drag time calculator and based on that and your increased rpm you could figure out horsepower, I think this would only work with the stock prop though, you have to keep one thing in a system constant to solve for another.

    Sean

  4. #4
    Hooah_Killer's Avatar
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    i suppose it could be done that way, but it would be nice to know what actual HP increases we see with each add on component. 1 hp for the exhaust for example, 5 hp fpr the timing mod, etc etc. After all mods i'd say I gained about 300 plus rpms but what does that mean in hp increase. But again I have an impros modded stock impeller. Maybe im anal but i like to know that data.

  5. #5
    jmatak9's Avatar
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    Hooah what kind of increase in top speed did you get with the impros mod? and what level or mod did you get done? just curious, I was thinking about sending off my pump to them but want input first

  6. #6
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    for that i would say you need to dyno it then,

    Sean

  7. #7
    Hooah_Killer's Avatar
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    i guess i'm used to automotive...cold air induction 5 hp, headers 10 hp, porting of heads 10 - 20 hp, performace intake manifold 30 hp and so on....

    adding race exhaust on my old zx7rr 5hp, porting heads and valve train/cam work 15-20 hp, and so on...

    surely riva would know how m a uch hp increase the free flow gives, if the 6 deg timing mod give you up to 300 rpms tht has to = a certain amount of hp,......i know jw on the 250xtech site did some calculations of hp on his site so i suppose we can calculate the the hp increase from there

    and to answer the question about impros mod and what it contributed to my speed???? i dunno my best stock was 66.5 running on empty my best this year after all the mods was 70.9 but i do know it was a factor and worth the cost

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