Which performance upgrades or accessories are essential for the CT5-V Blackwing?

Check the Cadillac V-Club forums for more resources. I am very satisfied with these for reliability:

• Red Line WaterWetter Coolant Additive
• BMR Suspension Alignment Lockout Kit

I just found this thread and honestly, it is frustrating that we even have to discuss this for a flagship car. I have been tracking cars for a decade and the Blackwing cooling is unfortunately not as good as expected once you are out in the Florida soup. I had issues with my 24 BW during a long session where it just went into limp mode without much warning, which is super sketchy when you have traffic behind you. It really ruins the confidence you have in the car and feels like a massive step back from what they promised. Like someone mentioned, thermals have to be the priority over everything else. My quick tip is to focus on the oil cooling specifically because that is usually what triggers the ECU to pull power first. I swapped in the CSF High-Performance Oil Cooler and it made a massive difference in how long I could stay out before things got hairy. Also, since you mentioned chewing through pads, the factory rotors are likely heat-soaking your whole hub assembly. I would highly recommend the GiroDisc Front Two-Piece Slotted Rotors because they vent much better than the stock setup and handle the expansion way better. Looking at the market, Cadillac really under-specced the heat dissipation for high-humidity environments. If you still have budget left from that 5k after the cooler and rotors, consider a set of Forgeline GS1R Monoblock Wheels. They are way lighter and the open design helps pull heat away from the calipers. Dont worry about the alignment yet, just get the car to stay cool first.

^ This. Also, I went through the same headache last summer down at Sebring. The humidity is no joke and my BW was pulling timing like crazy after just three hot laps. I ended up doing a lot of the cooling work myself in the garage to save some cash for track fees. One thing that really helped keep the IATs in check was focusing on the actual fluid flow through the intercooler circuit. A couple things that worked for my DIY setup:

• Installing the Lingenfelter High Flow Intercooler Pump made a noticeable difference in how fast the car recovered.
• I put in the Weapon-X Triple X Heat Exchanger which is a bit of a project to install but fits the budget well.
• Switching to Motul RBF 660 Racing Brake Fluid really helped with that mushy pedal feel when the Florida heat is hitting hard. Doing the work yourself is actually pretty rewarding and helps you spot issues before they become limp mode problems. You got this, the car is a beast once it actually breathes right!

I have been very satisfied with my setup since adding the Tapout Tuning Auxiliary Radiator Kit Stage 1 to handle high ambient temps. It works well and I havent seen limp mode since. Since you are in Florida, skip the alignment for now and prioritize Ferodo DS1.11 Track Brake Pads because they handle heat cycles way better than stock. No complaints here.

Just catching up on this thread and man it is such a bummer. Unfortunately the factory cooling is not as good as expected for our humidity and it is honestly so disappointing for a car at this price point. I had issues with my 24 hitting limp mode too and it just kills the track day vibes. You should definitely check out the Mighty Mouse Solutions Wild Catch Can to keep the intake clear and maybe the Weapon-X Boost District Stage 1 Cooling Kit if you can swing it. I am still learning the ropes with this platform but those seem like the most practical fixes for the heat soak. Thinking about all these expensive upgrades makes me miss my old photography hobby tbh. I was just looking at my Fujifilm X-T5 Mirrorless Camera this morning and thinking how much simpler it was to just swap a lens instead of tearing apart a front bumper in the garage. No engine codes or limp mode in photography lol. Anyway but yeah definitely prioritize the cooling and that catch can.

> I’m hitting some unexpected limp mode issues during long sessions which is driving me crazy. Unfortunately, stock heat management is not as good as expected for Florida humidity. Had issues with recovery times using simple setups... kinda disappointing. Compare the Katech High Performance Heat Exchanger and the C&R Racing Aluminum Radiator.

• Katech: Faster IAT recovery, cost-effective.
• C&R: Better build quality, significantly pricier. I suggest Katech for your budget. Also, dont skip Castrol SRF React Racing Brake Fluid.

^ This. Also, cooling is not as good as expected, unfortunately. Had major issues myself.

• Search YouTube for 'Blackwing track cooling' That video explains the safety fixes better than I can, tbh.