Rotating mass
#3
#4
Rotating mass
Originally posted by: DSNUT
As we discussed in the torque thread less of your torque will be used up to turn your drivetrain leaving more of it available to create horsepower.
As we discussed in the torque thread less of your torque will be used up to turn your drivetrain leaving more of it available to create horsepower.
#5
Rotating mass
You sound like you are correcting me but if you alter your incorrect assumption that I was referring to crank hp and insert the correct assumption that I was referring to rwhp I think you will find we are on the same page. I was referring to rwhp because crank hp is irrelevant when discussing the relative nature of reducing rotating mass unless you are talking about lighter flywheels, pistons and crankshafts. If you have less rotating mass past the crank you have more torque (the force at which combustion turns the crank) available at the rear wheels. With the torque curve measured at the rear wheels now posting higher numbers across the board, so will the horsepower curve at any given rpm.
Ron
Ron
#6
Rotating mass
Your gonna free up a few pounds of rotating mass which will feel like the bike gets up to speed faster. Exactly how fast...I could tell ya...I went to the whole drag axle assembly at one time. I know mine made a solid 2hp on the dyno. [img]i/expressions/face-icon-small-wink.gif[/img]
#7
Rotating mass
since you have the old model ds wheel hubs, you can easily shed at least 2-1/4 pounds from them. and you have the old model steel sprocket hub, and switching to the aluminum one will drop another 3 pounds easy. your brake hub is already alum, you probably meant to say sprocket hub. switching your 530 rear sprocket to an aluminum will drop another pound, without even changing to 520 chain. but change to 520 and drop even a little bit more.
look at my pics in my ds gallery in my signature link and you will see some pics of hubs and measurements for ideas, print it and give it to your machine shop - any local shop can turn the hubs for cheap. or you can buy the high dollar ones ready made which go even further and shed even more weight, and you can even get them to fit honda bolt patterns so you can run smaller rims for even more weight savings.
look at my pics in my ds gallery in my signature link and you will see some pics of hubs and measurements for ideas, print it and give it to your machine shop - any local shop can turn the hubs for cheap. or you can buy the high dollar ones ready made which go even further and shed even more weight, and you can even get them to fit honda bolt patterns so you can run smaller rims for even more weight savings.
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#8
Rotating mass
Originally posted by: DSNUT
You sound like you are correcting me but if you alter your incorrect assumption that I was referring to crank hp and insert the correct assumption that I was referring to rwhp I think you will find we are on the same page. I was referring to rwhp because crank hp is irrelevant when discussing the relative nature of reducing rotating mass unless you are talking about lighter flywheels, pistons and crankshafts. If you have less rotating mass past the crank you have more torque (the force at which combustion turns the crank) available at the rear wheels. With the torque curve measured at the rear wheels now posting higher numbers across the board, so will the horsepower curve at any given rpm.
Ron
You sound like you are correcting me but if you alter your incorrect assumption that I was referring to crank hp and insert the correct assumption that I was referring to rwhp I think you will find we are on the same page. I was referring to rwhp because crank hp is irrelevant when discussing the relative nature of reducing rotating mass unless you are talking about lighter flywheels, pistons and crankshafts. If you have less rotating mass past the crank you have more torque (the force at which combustion turns the crank) available at the rear wheels. With the torque curve measured at the rear wheels now posting higher numbers across the board, so will the horsepower curve at any given rpm.
Ron
#9
#10
Rotating mass
OPD is coming out with a jj&a axle kit that is supposed to be over 20lb's lighter in rotating mass. What do you suppose that going to show on the dyno. To me that sounds huge, throw in blue lable yamaha 9' wheels and a set of 25' tripple buffs for good measure. Any ideas? My understanding is that every 10lbs equals 1 hp. But does that hold true when it comes to the rotating mass or do you get a kind of double whammy. 20lbs overall off the bike and 20lb off rotating mass. Come on theres a math whiz in here somewhere.