After checking "gear conversion chart" in anticipation of changing
from oem 4.10 to 4.77 in my '02 I have to wonder if my fd is
indeed 4.10?
In 3rd gear at 3000rpm I'm at 30mph and 4th gear at 4000rpm at 50mph
and from what I remember on interstate in 4th gear doing 65mph I was
at 6000rpm just spooling for vtec launch.
The chart states I should be in 4th at 5000rpm doing 70!!
Going to double check tomorrow when on the interstate...keep
in mind I have 18" wheels as well which I think is great for
gearing as the larger wheel size is able to gather more
speed possible out of every gear.

And after reading chart...AP1 with 4.77 and 18" wheels is much better
than AP2 with 4.44 and oem 17inchers.

Just about even compromise!

 

Mark rear wheels with a crayon at 6 oclock.

Mark driveshaft at 6 oclock.

Turn both rear wheels slowly one complete revolution, counting the number of times the drive shaft turns.

If it turns 4.10 times, you have 4.10 gears.

If it turns 4.57 times (just past 4.5 turns) you have 4.57 gears.

etc etc...

This method is fool proof.

Many people don't realize that no matter what gears you put in, like 7.88 gears, the speedo/RPM relation show on the dash never change.

It's the RPM that will differ with ACTUAL road speed (verified by GPS, not your dash)

In my stock car in 6th gear lets say my dash says 70 and RPMS are at 4k.

If I change rear end gears, those numbers will still be exactly the same. But the car will be going slower.

Most people who gear an S2000 put a yellow box in under the dash.