Clutch total weight vs rpm loss/gain

[02ViperMody44]

Is there any formula for determining/estimating the rpm gain/loss with the addition or subtraction of total weight added to the primary. Just attempting to limit the amount of times that my clutch has to be apart.
Thanks

 

[Concept Carbon]

I beleve 1 gram total is equal to 100rpm

 

[sideshowBob]

Final Edit

LOL...I had to edit this due to messing it up on the first try!!

This formula will get you close:

Current RPM squared divided by Desired RPM squared X current weight = new weight

ie: current rpm = 8500
desired rpm = 8300
current clutch weight = 50 grams

8500 x 8500 = 72250000
8300 x 8300 = 68890000

72250000 divided by 68890000 = 1.049

1.049 x 50 = 52.45

new weight - original weight = amount to be added to each individual weight

52.45-50 = 2.45

So you would add approx 2 1/2 grams to each of your current weights to get your new desired RPM
---------------------------------------------------------------------------------------------

It works the same if you are trying to increase RPM as well.

Current RPM squared divided by Desired RPM squared X current weight =new weight

Current RPM = 8300 RPM
Desired RPM = 8500 RPM

8300 x 8300 = 68890000
8500 x 8500 = 72250000

68890000/72250000 = .953

Using the same 50 gram clutch weight

.953 x 50 = 47.65

50 - 47.65 = 2.35

So you would decrease each weight by 2.35 grams to get the new higher desired RPM

Make sense?

Speed is all about the Math!!!

LOL!

And you guys thought that school math on percentages was going to be useless !!!!

Hope this helps

 

[Thumper1]

crap, thats a lot of math. but it works. although i always had the 1 gram = 100rpm theory in my head after all the clutching messing around i have did.

 

[02ViperMody44]

Thanks guys for at least a direction to try.
Rick