|Identifying Muncie 4 Speeds III by Paul Cangialosi|
dead 2.20 first gear ratio which is the same in the M21 is not that good for
off the line acceleration. You would need at least a 4.56 rear end gear to compensate
for the dead first gear. That was OK when gas was cheap in 1967 and you did
not mind pulling 3000 RPM at 50 MPH while going to work. Times and requirements
have changed making both the M21 and M22 the closest ratio production 4 speeds
ever produced but also not practical for today's driving habits unless road
racing is your thing. The new Muncies being built today have some better ratios.Today's examples of the new car gear set ups are Mustang
GT's with a 3.35 1st gear and 3.08 rear. New Camaros with a 2.68 1st gear, 3.73
rear gear and .59 overdrive. ZR1's with a 2.68 1st gear, 3.54 rear gear and
a .59 overdrive. Get the picture? If you want to learn about this stuff DOWNLOAD
our RPM Calculator software for windows its free.
Top countergear is an M22. Lower gear is an M20. Notice the different helix angles of the gears.
Below left is an M22 1st gear. Right is an M20 / M21 1st gear.
- 1 Page - 2
Main Entrance | E-Mail US | Muncie Kits