Originally Posted by
KR145
Hope I'm not butting in but I figured I could offer some help.
Both engines are super quality and you would be happy with both but here are the general on track differences.
Kangaroo: smooth power, great fuel milage, good for smaller tracks
35plus: monster power, great small or big track engine, fuel hog
I don't how experienced you are in on road but I would say most will make runtime with both, the more experienced you become and faster you get the 35 will be harder to make 5 minutes with. If you get pretty dialed in the 35 could lower your lap times by around .2 - .3 per lap.
Hope this helps!