Power Comander HP Gains For VTEC?

Discussion in 'General VFR Discussions' started by My25thVFRVision, Sep 24, 2007.

  1. My25thVFRVision

    My25thVFRVision New Member

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    Hey guys Anyone know what kind of gain I could expect with a Power Comander on my 25th 07 VFR. I had it dynoed this weekend and have only a 5 HP gain from stock specs for Scorpion Exhaust a K&N filter and opend up air box. It Maxed at 113Hp @ 10900 RPM. Please help I NEED MORE!!!
     
  2. Sepp

    Sepp New Member

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    Well, my friend, you may as well stop now as you are making more dyno'd hp than anyone that has ever posted. A Dutch guy with a similar setup as you, but with a dyno tuned PCIII made 105 hp. Another fellow, Tinyminds, included a '99 catless header system (no cat, larger diameter header tubes) and got 109 hp.
    Stats below.
    Before:
    2004 Honda VFR800 (Staintune Exhaust, K&N Air Filter, Power Commander 3 Running Cozye's PCIII Map )

    After:
    2004 Honda VFR800 (Catless 99 Headers, Staintune Exhaust, K&N Air Filter, Power Commander 3, Dynotuned PCIII Map)


    Before ------ After

    @ 20% Throttle Opening
    HP: 23.6 ----- 32.8
    TQ: 31.8 ----- 36.3

    @ 40% Throttle Opening
    HP: 47.9 ----- 64.6
    TQ: 45.2 ----- 47.1

    @ 60% Throttle Opening
    HP: 78.3 ----- 87.6
    TQ: 51.2 ----- 53.3

    @ 80% Throttle Opening
    HP: 94.8 ----- 100.3
    TQ: 54.6 ----- 56.1

    @ 100% Throttle Opening
    HP: 101.2 ----- 109.3
    TQ: 57.7 ----- 59.2

    If you're truly making 113 dyno'd hp at the rear wheel, we'd like to see the dyno chart!
     
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  3. My25thVFRVision

    My25thVFRVision New Member

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    07 VTEC HP Specs

    I am pretty shure I read some where stock HP for the 07 was 108 is that wrong?
     
  4. Sepp

    Sepp New Member

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    Where did you read that? That is most likely SAE net at the crankshaft as measured by the factory. A chassis dyno reading rear wheel hp will always be less than that, but reflects real world usable power to the pavement (frictional losses due to transmission oil heating, final drive slippage, and less-than-perfect tire adhesion). Figure 108 SAE hp at the crank equals roughly 98 hp at the wheels (very roughly).
    Whoever told you your bike gained 5 hp needs to show some proof to that claim in the form of dyno charts taken over multiple runs at similar conditions before and after modifications. Otherwise, the 5 hp gain is mere speculation (or wishful thinking).
     
  5. My25thVFRVision

    My25thVFRVision New Member

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    I just had a single dyno and it does say 113Hp @ 10900 RPM so if that is the case and you say 98 Hp is the rough number than that's around a 15Hp gain. It also says torque is around 62. I can send you a scan of the print out if you want to check it out. Just let me know.
     
  6. RacerX

    RacerX New Member

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    I was thinking about a power comander not for top end power gain but to smooth out lower rpm throttle responce . Maybe to get rid of the on off bit around 4000 rpm . It realy is not a problem just woundering what others have found.
     
  7. Sepp

    Sepp New Member

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    My25thVFR:
    I would really like to see the chart. That is a world-beater dyno run, if it reflects rear-wheel hp on a chassis dyno. Nobody has ever posted a 15 hp gain from the mods you have. If the 113 hp IS at rear wheel, then your engine is making over 125hp at the crank, which is in the 900 - 1000cc category.
     
  8. jev.

    jev. over there

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    If you want to smooth that out, go to Radio Shack, buy some 330 ohm resistors, and do the o2 sensor mod. Works like a charm.
    I don't know if there is a write up on here for it, but if not go to vfrd and do a search for it.
     
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  9. My25thVFRVision

    My25thVFRVision New Member

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    Hey Sepp I made a scan of the print out into a Jpeg at work today its a little hard to read until you print it out. I will post it here in the morning as an attachment.
     
  10. GeraltZRivii

    GeraltZRivii New Member

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    [​IMG]
     
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  11. Viffer J

    Viffer J New Member

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  12. fink

    fink Member

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    I hope you good at holding your breath. The last post was in 2007
     
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  13. James Bond

    James Bond Member

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    If you had 120 hp, what difference would it make? It's the rider, every single time except in straight line boredom. I've seen everything from Kawi 250's to Yellow Wolf on a Goldwing out-run everything and anything on The Dragon time and time again. It's the rider, every single time.
     
  14. NorcalBoy

    NorcalBoy Member

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    Don't mind Get Smart, he prefers the straw man reply over providing an actual answer to any technical question. Yes, you can expect to see a gain with a properly tuned power commander. The amount of gain will vary from moto to moto depending on the tuners experience and knowledge, components, condition of the engine, yada, yada. You are not going to magically see a 5hp increase from a PC dyno tune, but you will be able to smooth out the VTEC tansition and clean things up across the board. You will not realize the full potential of the pipe, unless you tune it.

    I would do a couple pulls on the dyno with a stock air filter and the K&N. My experience is the K&N is garbage. As no pics were provided of exactly what you did to your airbox, it's hard to say whether that is helping or hurting your output. 5hp for a pipe is right in the range of what you might expect. If you want 120 hp, you are going to have to get the heads done. There is no other way.
     
  15. James Bond

    James Bond Member

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    The forum stalking troll and feckless bitch who doesn't even own a VFR comes out from under the bridge. You have no applicable experience. Just a couch rider.
     
    Last edited: Oct 5, 2019
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