IAT2 is valuable to show you what the air temps actually are coming out of the intercooler bricks, but that is only 1 part of the equation for allowable spark resulting in power. Unlike previous LS cars, the IAT2 is a worthless PID on the Gen 5 LT engines, because the timing/spark table is based on "Manifold Air Temp", which is a calculated algorithm that is barely affected by anything, even upgraded heat exchangers.
The way to make MORE POWER is to fight this heat and keep the temps going into the cylinders manageable so we can advance the timing and make that nice broad power band. Most LT4 owners are under the assumption that the stock heat exchangers are OK for basic mods, but as you will see, they're not even really sufficient for the stock setup as we frequently see knock on stock LT4 cars when pulled in their 1:1 gear. Couple this with the hot engine heat the supercharger picks up via conduction, the radiant heat coming off of the headers, and convection of hot air blowing around the engine bay, and you have the perfect storm for making, well.
As a supercharger compresses air, the byproduct is heat. Simply put, the LT4 engines are amazing and respond very well to throwing more boost at them, but with more boost comes more heat. In this tech article, you will read how this heat soaked ZL1 struggled to make over 630 WHEEL HP until the addition of our Boost Freeze Chiller! You will see at the end, that we were able to get an extra 4* of timing into this setup, lowered the boost by 1.5 PSI simply due to the cold compressed air, and the car pounded down nearly 690 WHEEL HP with just our WXM stage 1 carbon intake, WXM ported supercharger, Nick Williams 103mm Throttle Body, and our WXM Griptec 15% pulley, and Kooks headers! The WEAPON-X BOOST FREEZE CHILLER IS AVAILABLE NOW!
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