Short course race trucks

[FormulaZR]

That's an OK system (that system new sells for about $100). They are not the highest quality on the market...and aren't the most powerful. I believe they are a rebrand of the Hobbywing stuff (or vice versa). Also, I am 99% certain that sensored motors are not waterproof (not sure if that matters to you). It will definitely be a step up from the Titan 12T in the Slash now.

The Velineon system is good as well - but a 4wd Slash is the limit of that system.

But one of the most powerful, most reliable, cost effective, and "best" systems out there right now is the Castle Sidewinder 3/3800kv motor combo.

It's a 4 pole 3800kv motor paired with a waterproof ESC that can handle 3s in a 2wd truck (it can be used with 2s in a 4wd...and it will have better performance than the Velineon system - I'm just not sure it would be the best setup for a 4wd Slash). Very tunable...and very powerful. The combo can be purchased new for about $105.


If you are upgrading to brushless (especially the Castle SV3 combo) make sure the carriers have bearings instead of bushings and if you break a driveshaft, replace them with the HD driveshaft p/n 6852X.



Another option - if you want to move the Velineon system to the 2wd and step up the power in the 4wd you could go with the Castle MMP/2400kv combo (about $180 - and I don't think the MMP ESC is waterproof) and really have a hot rod.