What are the diff weights your running? I need to go though mine and what to know what others are running. I do know that i have a fresh rebuilt center diff with 10k. Any input would be helpful!
I use 10k in my 8ight for mostly road use. Seems be about right. I wouldn't go with anything much higher. I am even considering going down 5k to reduce the initial load on the motor.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy