In a car, I would say push further...but in a go kart with no real body work and/or protection, I think that is plenty.
Cry havoc and let slip the dogs of war.
2004 Saab 9-5 Aero - WAHSAABI - Way too much power/Koni FSD & Hirsch Springs/Big Sways - DD/AutoX'r
2007 Ford F-150 Lariat - 5.4L V8 - Bill secretly likes it
2015 Mitsubishi Outlander Sport SE - Wifey Mobile