Originally Posted by td-civ
i mean the e4rs 09 i have a g4rs 09 too
but im getting 2 e4rs 09 cars and want to know what i should buy for it before i build them
The upgrades that I have performed to mine are as follows. Please note I only race on high grip carpet track.
K2127 - E4 Lipo conversion kit
Why: allows you to run square ended motors (trinity duo/duo2) motors and extra tall lipo packs (SMC/Thunder Power).
K2145 - Metal Servo Mount
Why: so you do not have to shoe goo or double side tape your servo down.
K2143 - E4 Alum Front Bulkhead.
K2144 - E4 Alum Rear Bulkhead.
Why: Increases overall chassis stiffness (consistancy). In hard accidents the shock towers will not pop loose or the camber links.
K2110 - E4 Alum Steering block
Why: I snapped the plastic ones on my first run.
K2104 - E4 Alum Rear Hub Carrier
Why: Poped the camber link hard enough to ruin the plastic threading on the hub carrier. (Note: Wolf Hobbies Equivalent is cheaper)
K7102 - TC 2 Motor Cooling Head
Why: drops motor temp 20-25deg required to gear up a couple of extra teeth without boiling your motor.
WH10137 - New E4 Carbon Fiber Top Deck
Why: top deck screws are counter sunk giving an additional 1mm clearance above large lipo packs. (note: this top deck has additional material removed which will make it more flexable then original).
The original springs and sway bars are too soft for any practical use on carpet.
k-factory sway bars #1 thru #6 for tuning.
Front: #3 to #5
Rear: #2 or #3
Currently I use Losi JRXS springs as I can find them at my local hobby shop. For my next purchase will be getting a set of trf416 shocks and springs to try out with this car to see if they are more consistent (trying to reduce rebound and stock e4rs shocks have a stiff bladder and tall shock shaft). I have found the following ranges of springs practical for carpet use.
Springs Front : 15lbs thru 22lbs
Springs Rear : 12.5lbs thru 17.5lbs
Shock Oil (Carpet Use)
Front: 35-40wt oil (2 hole)
Rear: 25wt-30wt oil (2 hole)
My only guess would be that you would want to go overall softer in shock oils, springs, and sway bars from my advice above to gain additional traction if using this car outdoors or on low grip surfaces like ashfalt.