All,
I wanted to provide a comprehensive overview of my current build. I have a 2023 Lunar edition with 4k miles. I did the typical "warranty safe" mods such as FAS lower pulley, corsa exhaust, SB intake. I was happy with those mods, and my previous truck with the same mods dyno'd 627rwhp. My aux coolant pump went out on my new truck, and i attributed that to the texas summer heat. I decided to take a chance and purchase a chiller kit. I went with what i believe to be the VERY BEST kit on the market, the FI chiller stage 2 kit. My understanding with these motors is that they run hot, and the IAT sensor is in the absolute worst place possible. We lose A LOT of power to heat, especially in the warmer climates. My original intention was to leave the truck untuned, but i eventually changed my mind, ill explain why below.
After installing the chiller, i was getting cooler IC coolant, about 10-15 degrees below ambient. On the highway i was over ambient, about where the factory cooling would be. In FI's instructions they CLEARLY state to turn up the aux pump to 100% and alter the fan speeds to extract the full benefits from the chiller. I waited about a week, was generally satisfied but knew there was more on the table. I reached out to Shawn Liger with Hammer built performance and asked him to set me up with a stage 1 tune, most importantly because i needed the AUX pump turned up and the fan speeds changed to the prescribed table by FI.
After installing the tune, the chiller was working much better than no tune, which makes sense because the stock aux pump setting in auto is 36%, where after the tune its 100%. More water moving = less heat.
Fast forward to wednesday, i had the opportunity to put the truck on JMS Racing Mainline hub dyno. I was BLOWN away with the results. I had the chiller in race mode, and on a 72 degree day, my IC coolant was 26 degrees. We did a pull, and i managed 739.6rwhp in 5th gear.
I did not touch my blower, my pulley, my injectors. I didnt port anything, didnt ask for any special tunes, just something safe that anyone could obtain. To my knowledge there is 0 comparable data from anyone else. I've attached photos. I understand this isnt AWD as we dropped the front drive shaft, but the numbers are incredible regardless.
my truck stock dynod 562rwhp.
