Gen 1 Hayabusa Dyno Please Help

Discussion in 'Dyno Kings' started by Rileymcg32, Jun 20, 2017.


  1. Rileymcg32

    Rileymcg32 Registered

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    Hi all
    I just got my dyno results back and with the custom map it reads 156.6 max power, 96.1 max torque. With the map I downloaded from dynojets website it was 150.9 and 90.5 1498002008553428104871.jpg

    2001 hayabusa
    Power commander 5
    Small air box mod
    Eliminated paid valve
    Full yoshi exhaust 4-1
    -1+2 sprockets and 530zzz chain
    Fresh oil and coolant
    New plugs
    91 octane fuel

    It seems to be running great, I guess I was just a little surprised the numbers weren't better?
    If anyone has advice I'd love to hear it.
    I'm new here, don't bash on me too hard!
     
  2. nosbig

    nosbig Registered

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    Shawn
    Only advice I have is don't get hung up on the numbers. Just enjoy your great running bike.
     
  3. mjl3truck

    mjl3truck Registered

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    Dynos are like any measuring tool, you make them read pretty much what you want to.
    They should be used for comparison purposes. You got more, that is what counts.
    The curve looks great, see what you picked up in torque at 6000 rpms and hp between 7 & 8, that's a win in my book!
     
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  4. sixpack577

    sixpack577 Top Gun Registered

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    These guys are dead on, and in every post.
    No worries.
    Now, unless you plan on not spending any more money on your bike, run, otherwise, Welcome to the org!
     
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  5. CBXRider

    CBXRider Donating Member Registered

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    Terry
    With those mods aren't those numbers a tad low? Most dynos vary but for comparison my stock 06 netted 160...something at the wheel, not quite 161. A modified set of stock cans (lowered) it by almost five hp to 156 something. Kinda surprised me as I figured that a better breathing exhaust should boost the hp just a little even w/o any other mods. Apparently the factory techs put mine together on a good day!
     
  6. CBXRider

    CBXRider Donating Member Registered

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    Terry
    With those mods aren't those numbers a tad low? Most dynos vary but for comparison my stock 06 netted 160...something at the wheel, not quite 161. A modified set of stock cans (lowered) it by almost five hp to 156 something. Kinda surprised me as I figured that a better breathing exhaust should boost the hp just a little even w/o any other mods. Apparently the factory techs put mine together on a good day!

    Apparently we can't delete our own posts?! Have no idea how this was posted twice.
     
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  7. sixpack577

    sixpack577 Top Gun Registered

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    It all depends on the dyno, operator, elavation, weather, ect.
     
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  8. piratediverjefff

    piratediverjefff Registered

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    Jeff Castonguay
    I'd say you're pretty much in the ball park,most stock Gen I's made around 151-152 rwhp and with a tune,aftermarket pipe(depending on who's),and a PC would bump up to around 161+ rwhp.Brock always swore that a Gen I made the most hp on 87 octane(89 on a Gen II)so that 91 may have cost you a couple.Also,I remember an article from SuperStreetBike where they did some dyno testing with different sprocket combos and the results showed a dyno loss of rwhp by as much as 4+ hp depending on what combo you were using(chances are if you had stock gearing and 87 octane you may have hit that 160+ rwhp).

    http://www.superstreetbike.com/bigger-rear-sprocket-makes-more-horsepower-mythbusters
     
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  9. POWERHOUSE

    POWERHOUSE Frank Site Sponsor Registered

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    Frank
    No, actually you can't. You have to go out of your way and get into the data acquisition stack with a small screwdriver to do that. And why would any dyno operator adjust his dyno to read low, anyway? The way to confirm that is to get a print out of the run conditions and compare them to the temp and humidity as reported by the local weather service on the same day. Other factors can be tire pressure and accuracy of the air/fuel readings. O2 sensors need to be checked for accuracy prior to the tune, otherwise you are wasting valuable time and not actually tuning properly. Any measuring instrument has a margin of error, which is why accuracy is of the utmost importance. The resulting curves the OP got do look better, I would bet that particular dyno is off, and the OP should just enjoy the bike and not get hung up on numbers. A good running stock Gen 1 should do about 160 rwhp (SAE) and between 168-172 (or a little better) with a pipe and tune . . . IMHO.
     
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  10. Rileymcg32

    Rileymcg32 Registered

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    Thanks! I will
     
  11. Rileymcg32

    Rileymcg32 Registered

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    The mid range pickup was great!
    It looks like everyone's concencus is the same, I'm going to just go ride!
     
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  12. Rileymcg32

    Rileymcg32 Registered

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    This was my thought exactly which is why I posted the question, the small airbox mod alone has been tested to gain 4 HP. Anyway, all the guys told me not to worry, could be worse! Thanks for the reply
     
  13. Rileymcg32

    Rileymcg32 Registered

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    That's a great article! Im a big guy, which is why i bought a busa in the first place (and the movie biker boyz) I like the sprocket change, pulls my big ass a little harder. And now that mention it, yes the 91 probably cost me on the dyno.
    And now that I have the custom map made with 91 I should not change to 87, but probably should be running with 91 regardless of what the dyno reads?
     
  14. RansomT

    RansomT Registered

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    The dyno correction is in SAE. Most of what you see posted around on websites and such, the correction factor is STD. According to what the weather conditions were at the time, STD can be 3-4% higher than SAE. BTW, our friends across the pond use DIN correction which can be even more ... 5-6% higher than SAE.
     
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  15. POWERHOUSE

    POWERHOUSE Frank Site Sponsor Registered

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    Frank
    The "before" and "after" on any particular dyno on that same day is what is important. I agree, don't get hung up on numbers, go enjoy that bike :)
     
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