Originally Posted by
cweb
running the viper vst 17.5 in my T4.2 and i'm looking for some gearing help. currently running 28-78 and truck lacks punch on the small tight track i'm running on. Temps are way down, like 85 after a 5 min heat. esc is lower around 65, but inside it's cool on the track cause it's cold outside here. I have a mamba max pro with no boost, no traction control, medium start power and 30 deg on the can. This is a new build for me so I don't have much track time on the set up (got it off the AE site).
Try 28/72. That is what I have run with my SC10b so the weight is about the same and the gear ratio is the same. Also, turn the motor can timing all the way up to 45. Check your motor temp and if it is still ok, move the timing a little bit more. There is a sweet spot just after 45 degrees of can timing. It will really wake up the motor.