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Dyno Pull #2

Discussion in 'Motorcycle Tech Talk' started by JohnnyBiker, Nov 14, 2011.

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  1. hotroadking

    hotroadking Super Moderator Staff Member

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    Yep, there are differences
    that can happen, plus, who knows
    once you get the numbers you can
    target the best cam for your objective.
    hotroadking, Nov 16, 2011
    #41
  3. JohnnyBiker

    JohnnyBiker Well-Known Member

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    I don't remember who it was but at one point someone had mentioned that maybe my air cleaner/intake could have been allowing too much air or restricting it somehow. Well, I think that I am going to put the stock air cleaner on and give it one more shot on the dyno. My guy inquired about that yesterday but I sort of blew it off, but today I sat and thought about it and why not give it a shot? I basically get free dyno time.. :D
    JohnnyBiker, Nov 16, 2011
    #42
  4. hotroadking

    hotroadking Super Moderator Staff Member

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    Well you are a bit rich in a few areas and
    I'll bet the stock filter makes it worse (Richer)

    My example doesn't have numbers because, well, it
    is just an example, plus you can pretend you like algebra

    If the heads flow x Cfm and the intake and carb y cfm, then
    the max air the heads can get, presuming y > X is y.

    Now if you add a filter that pulls 2Y air
    and the carb intake can only take 1y air you
    still can't get more than 1y air to the engine
    as the carb/ intake restrict air.

    However if you put on a filter that has less than Y flow
    capabilities say Z then you will only flow Z air.

    Basically stick a finger up one side of your nose and go jog
    see how that works out for ya...

    Now this presumes the aftermarket filter you have
    on the bike now isn't restricting anything.

    If it were me I'd pull the aftermarket filter
    and see if the numbers (AFR) and power
    change. If you start leaning out you
    know the filter is restricting you...
    hotroadking, Nov 16, 2011
    #43
  5. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Hell I have nothing to lose and everything to gain...
    Last edited: Nov 16, 2011
    JohnnyBiker, Nov 16, 2011
    #44
  6. hotroadking

    hotroadking Super Moderator Staff Member

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    Hp and tq

    Do both. Get a pull with the stuck filter and one with no filter.

    See what happens


    Sent from my iPhone using Tapatalk
    hotroadking, Nov 16, 2011
    #45
  7. JohnnyBiker

    JohnnyBiker Well-Known Member

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    That is the plan.:cool:
    JohnnyBiker, Nov 16, 2011
    #46
  8. MO tex

    MO tex New Member

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    shoot JB 70 hp is more than the new 103s they are only 68 hp from the factory. if you get 75 to 80 that thing should realy screem. you got me thinking i should get my bike dynoed to see what i am getting. i mite be close to 70 hp also.
    MO tex, Nov 16, 2011
    #47
  9. JohnnyBiker

    JohnnyBiker Well-Known Member

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    80 is my goal, but it is going to depend on ow much it is going to cost me to get it there. This bike is scary as is... I LOVE IT!!!!:D
    JohnnyBiker, Nov 16, 2011
    #48
  10. hotroadking

    hotroadking Super Moderator Staff Member

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    JMO but peak hp and tq numbers
    are just for forum and bench racing
    they really don't mean a lot and they
    don't make the bike fun

    What you have to concentrate on is
    getting a long smooth high tq curve
    that's what you feel and that's the fun

    There is no HP without TQ

    HP is just a number showing the work the tq is doing at a
    given rpm

    focus on a better tq curve should be the goal

    post the sae chart I want to see it.
    hotroadking, Nov 16, 2011
    #49
  11. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Yep, that is your opinion....:D
    JohnnyBiker, Nov 16, 2011
    #50
  12. Lucifer

    Lucifer Well-Known Member

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    More than an opinion JB,and I agree 100%...HP is for bar stool braggin' it's torque that moves your azz down the road and puts the grin on your face...:D
    Lucifer, Nov 17, 2011
    #51
  13. Lucifer

    Lucifer Well-Known Member

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    It's still pretty rich up to 4000RPM's if you're going back to play on the dyno again,maybe drop the needle 1 notch,see what happens...I believe an AFR of 13.5(give or take a little) makes the most power...
    Lucifer, Nov 17, 2011
    #52
  14. ringo912

    ringo912 Active Member

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    Horsepower is a theoretical calculation, Torque is everything. :D
    ringo912, Nov 17, 2011
    #53
  15. JohnnyBiker

    JohnnyBiker Well-Known Member

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    I wasn't referring to just that specific thing, actually not at the AFR at all.. Just being a smart ass. I am not bent at this point because we will be back on the dyno again soon. :D We are having fun playing. Actually, I took a close look at my receipt yesterday and I was charged 10 bucks for gas, 3 bucks for a jet and 42 for that cycle pro kit that was installed. Charged nodda for labor, or actuall dyno time..:D
    JohnnyBiker, Nov 17, 2011
    #54
  16. MO tex

    MO tex New Member

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    JB going to the HD shop right now they just called and said they can dyno my bike today. will let you know how it dose
    MO tex, Nov 17, 2011
    #55
  17. JohnnyBiker

    JohnnyBiker Well-Known Member

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    cool, I am looking forward to hearing what is happening...:cool:
    JohnnyBiker, Nov 17, 2011
    #56
  18. MO tex

    MO tex New Member

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    well JB got my bike on the dyno and it has 72 hp and 75 pounds of torque. the dyno man said it was a little rich but he didnt think going to a smaller main would make much difference. so i think im going to stay where i am but i may change my carb to a s&s super e just for the hell of it and because i have one allready from a nother project
    MO tex, Nov 18, 2011
    #57
  19. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Awesome!!! What kind of dyno?? those are some pretty good numbers that you have there. :cool:

    I am so impressed with the difference in my bike that I just want to be on it constantly. I wish it were spring already.. :D
    JohnnyBiker, Nov 18, 2011
    #58
  20. MO tex

    MO tex New Member

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    dont know what kind of dyno it is. they said it was what i was getting at the rear wheel. they strap the bike to it and run it through the gears. its what they have at the local HD shop here in KC mo. i dont have a scaner so i cant show you the chart
    MO tex, Nov 18, 2011
    #59
  21. JohnnyBiker

    JohnnyBiker Well-Known Member

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    Most likely a dynoJet. That is cool, I hope that you like what you got? Just a thought though, I would probably keep the cv carb on it. If your guy is saying that you are a little rich now, I have heard that the Super E tend to dump a lot of fuewl and are harder to tune than the cv. Just a thought..

    Today I took Whip out for a 60 mile ride. It was a little cold but not as bad as yesterday. I brought her up to 100 mph with not even a single hesitation. she got there faster than ever before. I passed two cars in heartbeat. I started my passing at the speed off 60 and by the time I got passed both cars I was at 85.:D I think that my bike is going to have the carbon cleaned out in no time. :cool: with Whip responding like that I would have to say that it is almost better than sex, but not really that close....:roflmao:;)
    JohnnyBiker, Nov 18, 2011
    #60
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