I run spec esc's in both my 17.5 vehicles so no boost for me. I shoot the motor timing through the roof though. I run my vulcan at about where the "50" mark would be if there was one. All that aluminum and ceramic stuff in the transmission makes it where the motor is literally 100 degrees after a 5 min run with a 78/29 gearing. I have it absolutely dialed. thats why im really hesitant to switch to mod motor cause Id have to change a lot of stuff or I'll ruin all of it.