We have tested the EC5 connectors on 2 spartans with both Octura x442 prop and Stock Traxxas Prop. Both Spartan's have the additional ESC Cap added per recommendations from Castle (1000uF 35v Low ESR).
Infrared radar guns were used on both set-ups running 6s. We ran MaxAmps 5000 mah 100c, Thunder Power 65c 5000mah, Traxxas 25c 5000mah, and the BAD NAME COMPANY 65c 5000mah's all successfully. The better lipo's ran a bit cooler... but at the end of the day there was a huge difference in the response of the boat. It seems to run much smoother now. We both have the aluminum cooling jackets as well.
Boat 1 (mine) - Stock Prop on TRX connectors
ESC - Never over 112 deg
Caps - Never higher than 125 deg
Additional Cap - never higher than 115 deg
Motor - Never above 99-101 deg
Lipo's - Never over 120 deg (Typically around 110 though)
Boat 1 (mine) on EC5 Connectors:
ESC - Never over 96 deg
Caps - Never higher than 98 deg
Additional Cap - never higher than 98 deg
Motor - Never above 88 deg
Lipo's - Never over 96 deg.
Everything ran very cool with the Octura x442 prop as well (maybe a few degree's higher)
My buddy's boat seemed to have much higher temperatures than my set-up from the factory. Even with the additional cap added he was running higher temperatures than I was (roughly 20-30 deg ESC/Motor) and his caps would reach around 150-160 deg. His additional cap reached 180 at one point.
After the EC5 connectors were added his temperatures reduced closely to the temperatures I am currently running on both stock and Octura props.
With that said, it's a very simple modification with great results. I'm currently converting all of my vehicle's to the EC5 connectors.
And here's why you should never run in shallow water:
Around 54mph flip trying to get it running close to shore to clock it with our GPS gun. Loss of sight/control on my end (radar guy was in front of me) and did a nosedive into the bottom of the lake. Time for a new hull...