Just finished my Slash/Slayer copycat project, so here's some info:
Basic car: XRay XB8 (old racer, bought as a roller, cleaned and reconditioned)
Motor: Feigao 540 XL 08
Battery: Zippy-H 4S1P 4000mAh LiPo
ESC: Mamba Max with CC BEC
Weight: 3895 grams (8,59 pounds), as ready to drive
Modifications: RCM motor & servo mount, RCM motor heatsink, modified Tekno battery tray, pretty much selfmade or heavily modificated body mounts for Slash body, modified Slash front bumper, selfmade rear bumper mounts from very tough 6mm industrial plastic with E-Maxx bumper and E-Maxx rear skid.
Now if I'd just dare to take this beauty outside...
Project pictures can be found from
here.
(yes, I vented one lipo when testing the buggy with 3500kv L-sized motor...)