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Dyno results

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Old Apr 29, 2018 | 10:22 PM
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Default Dyno results
Started with a stock 07 Street Bob TC96, added S&S power tune duals, AN big sucker intake, PC5, and Andrews 48H cams. Dyno'd this weekend, custom map turned out 91.12 hp @ 99.64 tq.
 
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Old Apr 29, 2018 | 10:47 PM
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Nice. 91hp is a lotta fun. You'll be banging the front tire off the ground in 2nd & 3rd.
 
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Old Apr 30, 2018 | 05:21 PM
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Post up the graph!
 
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Old Apr 30, 2018 | 05:49 PM
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Old Apr 30, 2018 | 11:47 PM
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Never seen a TQ curve so bumpy, unless the tire was slipping on the drum.
 
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Old May 1, 2018 | 10:20 AM
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Interesting the numbers cross at about 4500 rpm. I thought the formula was something like: HP = (TQ*RPM)/5250

Which is why you see most dyno sheets tq/hp cross at 5250.
 
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Old May 1, 2018 | 01:07 PM
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Originally Posted by k-weaver
Interesting the numbers cross at about 4500 rpm. I thought the formula was something like: HP = (TQ*RPM)/5250

Which is why you see most dyno sheets tq/hp cross at 5250.
Good catch. Something doesn't make sense there.
 
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Old May 1, 2018 | 01:16 PM
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Being as I haven't ever had anything dyno'd before. Your statement got me interested, and I'm all about useless knowledge. So there is a great video by an engineer that explains( through a few math formulas) how and why each number is what it is. Very interesting video
. But the easy answer is that the graph is scaled to fit both graphs over each other. the HP scale is 100 and the tq scale is 105. That would move the intersection point. Watch the video, very interesting. 5252 is the point at which hp=tq its 1 to 1. But as already stated when the graph gets scaled to fit different size scales the intersection point has to move.
 
Last edited by Caseyt; May 1, 2018 at 01:19 PM.
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Old May 1, 2018 | 08:14 PM
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I hate when they use those offset graph scales. Sounds like pretty fun numbers for a Dyna.
 
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