Disappointing dyno run today - Victory Forums - Victory Motorcycle Forum
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post #1 of 22 (permalink) Old 06-08-2012, 11:49 PM Thread Starter
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Default Disappointing dyno run today

I put my bike on a dyno this afternoon and was. Of expecting the numbers to be so low. Max hp was 82.6 at close to 4500 rpm, tq was 98.15 at 3600 rpm. I have D&D'S, PCV with the stage one download, and I think it's a Vic high flow air filter. Is it just me or should it be putting out a little bit more power then that? I will try to post a pic of the print out if I can.
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post #2 of 22 (permalink) Old 06-09-2012, 05:23 AM
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Are you riding your Cross Country or a dyno?? How do you like the performance of your bike? That's the real question.

A while back I took my bike to a dyno guy who had come highly recommended, and I was sorely disappointed with the results. Not so much the paper results (although they weren't far off from yours), but my bike was running worse than when I took it in. I watched his entire process of tuning and his sole focus was pretty much mapping my AFR's to stay between 13.5 and 13.0. I was so disgusted with the performance of my bike I threw his map out and started over with a fresh downloaded map. I've since tinkered with it off and on until I've pretty much settled on what I have now, which is nowhere near what he had set it. My bike runs great!! No decel pops, no hesitations, and it will plant you hard back in your seat with just the slightest twist of the throttle. I could care less about what it gets on a dyno as long as it runs like it does, I'm a happy guy.

Lesson learned...the dyno is the dyno...the street is the street.

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Last edited by DunedinDragon; 06-09-2012 at 05:25 AM.
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post #3 of 22 (permalink) Old 06-09-2012, 05:47 AM
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My guess is that the rubber sound deadening strip is still in place on your bike. Your numbers are a perfect reflection of a basic S1

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post #4 of 22 (permalink) Old 06-09-2012, 05:50 AM
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Is that SAE, STD, Uncorrected? It could vary a lot by the correction factor. Was it a Dynojet machine?

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post #5 of 22 (permalink) Old 06-09-2012, 05:55 AM
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Quote:
Originally Posted by DunedinDragon View Post
A while back I took my bike to a dyno guy who had come highly recommended, and I was sorely disappointed with the results. Not so much the paper results (although they weren't far off from yours), but my bike was running worse than when I took it in. I watched his entire process of tuning and his sole focus was pretty much mapping my AFR's to stay between 13.5 and 13.0. I was so disgusted with the performance of my bike I threw his map out and started over with a fresh downloaded map.

Lesson learned...the dyno is the dyno...the street is the street.
I had the complete opposite experince. The bike was super abrupt on/off the throttle at low rpm, it backfired on decel at a certain rpm, and gas mileage was in the 30s. After the tune it runs perfectly, drivability is exponentially better, no pops, and it gets 46 mpg.

So what A/F do you shoot for when you tune it?

2006 Victory Kingpin
Lloydz 116" Stroker/Big Bore, .495 Cams, Torque Tubes Airbox,
RPW Thor Pipe, Lloydz ECU Flash, PC-III, PTS (-2), Rivera
Primo Clutch Spring, 31 Tooth Pulley w/Buell Belt.

Last edited by half_crazy; 06-09-2012 at 06:03 AM.
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post #6 of 22 (permalink) Old 06-09-2012, 09:18 AM Thread Starter
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The rubber strip is gone too. The bike runs very good but by looking at the lines on the print out it could run better I think. The lines were very wavy through out the curve, both hp and tq. The guy running the dyno did the first pull in 6th gear for the first then went to 5th for the last two. He lugged it down to 39 mph before starting every time. It was a dynojet sae with a correction factor of 1.04


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post #7 of 22 (permalink) Old 06-09-2012, 09:41 AM
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Wavy lines are more typical then not, and have to do with the dyno; then the bike

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post #8 of 22 (permalink) Old 06-09-2012, 10:28 AM Thread Starter
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Would it do any good to have it dyno tuned and have a custom map made for it? Thanks for all the help trying to understand this.


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post #9 of 22 (permalink) Old 06-09-2012, 11:24 AM
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Quote:
Originally Posted by DiamondwhiteCC View Post
Would it do any good to have it dyno tuned and have a custom map made for it? Thanks for all the help trying to understand this.


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Nope. Sounds like you would be better off adding auto tune

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post #10 of 22 (permalink) Old 06-10-2012, 01:24 PM
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For the only mods being a fiter, exhaust and a tune, I don't see the bike picking up a significant amount of power. Besides elevation, Air temperature will impact your numbers also, so if the dyno was done on a hot day, you may not be seeing what the engine will make under cooler conditions.

But the important question is: what is your A/F ratio. Do you have a chart from that dyno? If you just loaded a pre-configured map, it may not be right for your mods and elevation level. What MPG are you getting?

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