Originally Posted by
PHI2
Hi guys can someone give me a starting point for 17.5 in my XX4 as the last time I used this awsome car was with a 9x2 brused motor.
Hope to set this up for my son until he learns to drive a bit better.
Thanks
Macca
Assuming non-boosted operation I'm running as low as 4.9, but my drive train is significantly lightened. Try starting around 5.5, run a heat sink and a fan if you can and check the motor temp every couple of minutes first time out in case I've underestimated the influence of all that steel.