I redid this to try a better copy.

Print out and try it. Just need to go measure your tire diameter.

Try this copy. Print it in black and white.

hmm I think I did something wrong there as it went way off the scales. This place tells me mine should be 220MPH (unlikely it will ever get anywhere near that though)

http://www.geocities.com/z_design_studio/

The program doesn't take into account anything other then transmission ratios and engine speed. Nothing like CoD or torque is taken into account. Its working on a thoery nothing more. Its a guide nothing more to what the car could do given the best condtions engine etc

Give this one a try:

http://vexer.com/68rt/speed.html

None of them are correct so far.

I have a

79' ZX 5-speed

R200 3.90 diff

225/50ZR16's

At 3000 RPM's my speed is exactly 80mph and I've done the mile on the frreway (using markers, in exactly 1 minute @ 60 MPH. My speedo is dead-on.

So far, the second chart from E-ticket says my tires are 24.9" tall when they are new and 24.25" tall it also says that my 3.90 diff and 79' 5-speed are WAY off and I should only be doing 65 MPH (ish)

Is there a scale that actually works out there. or is my Z retarded?