Q & A Thread - Post your questions here

[e240]

e240,

i used your gearing calculator. and was wondering

• how come fd plays role in the rpm shift landing point?

• assuming the use of jdm k20 gearbox 6 speed
  
  • red is using 4.7fd
  
  
  • blue is using 5.4fd
  
  
  which one would be accelerate faster?

edit: thanks for sharing your info.

Hey Sorry for the late reply - I am soo slack..LOL..

1) going with a taller final drive gives you more torque by mechanical multiplication. The higher the ratio is, the easier it is for the drive axle to turn the wheels = faster acceleration. Your rpm shift points don't really change, but you'll find yourself shifting at a lower speed.

2) With a shorter final drive, you achieve a higher RPM @ a lower speed, the acceleration on the 5.4 would be faster