i am looking for into on driveshaft rpm vs. mph
are there any table or graphs out there? i wasn't able to find any.

 

Divide the rpm you're turning by the tranny ratio gear you are in. In the 1:1 gear, your DS and crankshaft are turning at the same rpm. You could make some Excell spreadsheets to make it easier, and then graph it.

[edit]- forgot to mention, after referencing your DS rpm with engine rpm, you can use www.f-body.org/gears for easy reference to mph. Computing it with rear gear ratio and tire size might be a little more tedious.

 

Actually, on second thought, i put some pencil to paper and figured out some formulae...

To find tire rpm at any speed, take your mph and divide it by your tire's radius. Then to find the DS rpm, multiply this value by your rear gear ratio. Spread sheets would make this easy to find out.

[edit, again]- dammit, it's been so long since i've taken dynamics... the units must be consistent. And i'm not smart enough right now to figure it all out

 

that site helped a ton! it since it gives engine rpm vs. mph
ok i see were you were going. it just made me realize how to calculate it, *grabs pencil*

 

i think i've finally gotten it. The relationship of tangential velocity of a wheel (velocity at a point on the edge of a wheel... which will coincide with the mph of the vehicle) is this:

v=r (omega)

convert mph to inches per second by using: mph(1.47)(12)

Divide this value by the tire's radius (or diameter/2)

Then multiply this by the rear gear ratio to get the DS's angular velocity in rad/s. Then to get revolutions per minute, divide this value by (2*pi) to get revolutions, then multiply by 60 to get minutes. The end result should be rpm of the DS.... i hope.

It'd be easier if i could clean this up, haha

 

what i did was this
take mph and convert it to inches per minutes
then divide by the cirumference of the wheel (in inches). (wheel rpm)
then divide by the axle ratio to get DS rpm

 

There's a calculator in the cz28 calculations section, but i'm having a hard time following the algorithm. Oh well, that's why i'm not paid to do these things

 

yea, my forumula is messed up
i can get the info from that link you posted though.