Dyno Basics - Help
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Road Master
Joined: Oct 2005
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From: Magnolia, Texas
Dyno Basics - Help
When I see a red and a blue line depicted on a dyno chart, does that mean there was a baseline run and then the final run ??[/align][/align]Okay one more...when it is said thata bike has a flat broad torque band does that mean that it is developing steady torque over a wide rpm range ??[/align][/align]An example of this would be really handy if provided.[/align][/align]Please help me understand.[/align][/align]Thanks,[/align]Ray[/align]
Outstanding HDF Member
Joined: May 2007
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From: Florida
RE: Dyno Basics - Help
The two colors are two seperate runs.....which is which I haven't a clue with out looking at it or seeing the number of the run beside the color.
A broad tq line will be a slightly arched line from left to right running across the page....how broad is it? Can you post the run?
A broad tq line will be a slightly arched line from left to right running across the page....how broad is it? Can you post the run?
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Road Master
Joined: Oct 2005
Posts: 950
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From: Magnolia, Texas
RE: Dyno Basics - Help
ORIGINAL: Doc 1
The two colors are two seperate runs.....which is which I haven't a clue with out looking at it or seeing the number of the run beside the color.
A broad tq line will be a slightly arched line from left to right running across the page....how broad is it? Can you post the run?
The two colors are two seperate runs.....which is which I haven't a clue with out looking at it or seeing the number of the run beside the color.
A broad tq line will be a slightly arched line from left to right running across the page....how broad is it? Can you post the run?
This isn't my chart...I got this off the internet...I'm just trying to get educated. So the way I read this run, 80 lb/tq is developed right from a roll on at around 2100 rpms peaking at 102 lb/tq @4000rpm.
Does the power (torque) drop off at 5200rpm even though rpms are still going up.
This chart would not be considered a "flat" torque bandbecause of the arch, correct ?
It does appear to bea good broad torque band, correct ??
What would a optimum chart look like ??
The chart also shows a red and blue line...what's this about ?
Like I said before, I'm just trying to seek an uderstanding for reading these dyno charts.
Thanks for your help.
Ray
[IMG]local://upfiles/5217/53EE9FC31D474FF6B121C9159A53AD02.jpg[/IMG]
Outstanding HDF Member
Joined: May 2007
Posts: 2,304
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From: Florida
RE: Dyno Basics - Help
Ray you're reading that graph pretty well. The blue line is the 3rd run and the red is the 2nd. The line coming up from the bottom and going higher at the end (or higher RPMs) is the hp line. The Graph it self looks real good except at 5200 rpm the hp and tq both dip then rise again....this is a problem area that I guess is fuel. Without the fuel line in the graph this is problem area isnothing but a guess. The tq line is a broad tq line and it reminds me of a woods TW5 cam.....the characteristics are very similar. The more you see the more you learn but it sure would help if you where making the runs your self. You can read mechanical, electrical, and fuel problems with a dyno with the proper training an experience, it's not all about hp and tq.
Thread Starter
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Road Master
Joined: Oct 2005
Posts: 950
Likes: 1
From: Magnolia, Texas
RE: Dyno Basics - Help
ORIGINAL: Doc 1
Ray you're reading that graph pretty well. The blue line is the 3rd run and the red is the 2nd. The line coming up from the bottom and going higher at the end (or higher RPMs) is the hp line. The Graph it self looks real good except at 5200 rpm the hp and tq both dip then rise again....this is a problem area that I guess is fuel. Without the fuel line in the graph this is problem area isnothing but a guess. The tq line is a broad tq line and it reminds me of a woods TW5 cam.....the characteristics are very similar. The more you see the more you learn but it sure would help if you where making the runs your self. You can read mechanical, electrical, and fuel problems with a dyno with the proper training an experience, it's not all about hp and tq.
Ray you're reading that graph pretty well. The blue line is the 3rd run and the red is the 2nd. The line coming up from the bottom and going higher at the end (or higher RPMs) is the hp line. The Graph it self looks real good except at 5200 rpm the hp and tq both dip then rise again....this is a problem area that I guess is fuel. Without the fuel line in the graph this is problem area isnothing but a guess. The tq line is a broad tq line and it reminds me of a woods TW5 cam.....the characteristics are very similar. The more you see the more you learn but it sure would help if you where making the runs your self. You can read mechanical, electrical, and fuel problems with a dyno with the proper training an experience, it's not all about hp and tq.
Thanks for your input.
Ray
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