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So my last thread on clutching got a little derailed because of an issue that my machine was having, so I decided to start a new thread with some specific discussion around Olav Aaen's speed diagram.
As soon as I read his book and saw the speed diagram, it made a few things click for me. I'm a visual learner and found that the diagram helped my comprehension immensely. I've attached a couple of screenshots of his speed diagrams below. (excuse the handwritten notes, they were on the PDF copy I had)
In his book, Olav suggests that a typical low ratio is 3:1 and a typical high ratio is 0.8:1. When viewing the two attached drawings (both from his book), it appears that the low/high ratio lines that are plotted are actually different from each other, they don't intersect the same points on each diagram.
So I guess my first question is; at a 3:1 low ratio should the line always be plotted consistently on the speed diagram? - the same question applies to the 0.8:1 ratio line. Or does this change depending on the specific machine and how it is set up, how much power it produces, etc.
My next question depends on the answer to the first question I suppose - If the low ratio and high ratio can be plotted consistently on the graph, how do you actually calculate the angle of the lines?
Understanding that the stock low ratio on a 2014 XP1000 (as an example) is 2.6:1 low ratio, how would you accurately draw this line? If the lines can be consistently plotted, they will be in a different position on the diagram for our example vehicle (2014 XP1000) than what is shown in Olav's book.
And my final question - can anyone tell me what the overdrive ratio is on these machines? I know the low ratio is the 2.6:1 but I really have no idea what the overdrive ratio is.
Looking forward to discussing this in more depth - I think it has the potential to be an amazing tuning tool for me in the future when my understanding is a little more solid.
I have a ton more questions, but I need to know the answers to these ones before I can move on haha. :grin
As soon as I read his book and saw the speed diagram, it made a few things click for me. I'm a visual learner and found that the diagram helped my comprehension immensely. I've attached a couple of screenshots of his speed diagrams below. (excuse the handwritten notes, they were on the PDF copy I had)
In his book, Olav suggests that a typical low ratio is 3:1 and a typical high ratio is 0.8:1. When viewing the two attached drawings (both from his book), it appears that the low/high ratio lines that are plotted are actually different from each other, they don't intersect the same points on each diagram.
So I guess my first question is; at a 3:1 low ratio should the line always be plotted consistently on the speed diagram? - the same question applies to the 0.8:1 ratio line. Or does this change depending on the specific machine and how it is set up, how much power it produces, etc.
My next question depends on the answer to the first question I suppose - If the low ratio and high ratio can be plotted consistently on the graph, how do you actually calculate the angle of the lines?
Understanding that the stock low ratio on a 2014 XP1000 (as an example) is 2.6:1 low ratio, how would you accurately draw this line? If the lines can be consistently plotted, they will be in a different position on the diagram for our example vehicle (2014 XP1000) than what is shown in Olav's book.
And my final question - can anyone tell me what the overdrive ratio is on these machines? I know the low ratio is the 2.6:1 but I really have no idea what the overdrive ratio is.
Looking forward to discussing this in more depth - I think it has the potential to be an amazing tuning tool for me in the future when my understanding is a little more solid.
I have a ton more questions, but I need to know the answers to these ones before I can move on haha. :grin
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