I run an ACE DS1015 and measured 3.8 amps or so in a Slash 4x4

Was measured with an Eagletree data logger so not sure how accurate they are

Enough to require an external Bec with the MMP or Monster ESC's, tried the cap first but it didnt help

I do use Spekky recievers though which are not good at handling a voltage drop

Cheers