Honestly, before you go crazy with pulleys, you gotta think about the LT4's cooling logic. In my experience, these cars are basically heat sponges, and once the ECU sees high IATs, it pulls timing and kills your fun. If you're looking for the best bang-for-your-buck while keeping it SAFE, I highkey recommend looking into a DSX Tuning CT5-V Blackwing Barometric Pressure Breakout Harness. It's super cheap (like $50-70) and helps the car manage air density better when you start modding.

Also, if youre worried about heat soak during pulls, skip the pricey carbon stuff for now and grab a Monster Intercooler Reservoir Tank for Cadillac CT5-V Blackwing. Adding that extra coolant capacity is literally the best way to stabilize temps without a full cooling overhaul. It makes the system way more consistent for back-to-back hits. Combine that with some Red Line WaterWetter SuperCoolant for like $15, and you'll be sooo much happier with the reliability. It keeps things chilly and protects your engine long-term!! peace

yo, congrats on the Blackwing! I mean, honestly, it's such a beast stock but I totally get the itch for more power. For your situation, I would suggest starting with the Kong Performance CT5-V Blackwing Carbon Fiber Intake. It basically wakes up that supercharger whine and adds some nice flow without needing a crazy tune right away.

But yeah, if you're doing a pulley swap, you gotta fix the heat issue. I went with the DSX Tuning CT5-V Blackwing Auxiliary Fuel System and a C&R Racing High Performance Intercooler Heat Exchanger to keep temps down during back-to-back pulls. It seriously helps with that heat soak you're worried about. Just my two cents tho, it works well and keeps it dailyable!

Ok so, I've spent way too much time chasing numbers on the LT4, and honestly, it can be a total headache if you aren't careful. I learned the hard way with my last build that just throwing parts at it doesn't work. I went with a random pulley and a cheap tune initially and it was such a disaster... the car literally pulled timing after just one pull cuz of the heat. Super frustrating tho.

For your Blackwing, I highkey recommend focusing on these areas instead:

* **Cooling Upgrades:** Just get any upgraded heat exchanger from a brand like Cordes. It's basically a requirement if you're gonna do back-to-back pulls.
* **The Tune:** Stick with a reputable shop like Tapout Tuning for your recalibration. They really know how to keep the factory safeties in place while waking up the torque.
* **Exhaust:** Look into some x-pipes or headers from Kooks to let that LT4 actually breathe.

Basically, dont skimp on the cooling or you'll regret it like I did lol. Good luck with the build!

Honestly, I'd actually suggest a different approach than the high-flow intakes everyone usually raves about. I've spent a fortune on those fancy carbon setups for my LT4s and, unfortunately, the bang-for-your-buck just isn't there if you're worried about heat soak. I once dropped two grand on a setup that looked pretty but actually heat-soaked FASTER during back-to-back highway pulls... it was super frustrating.

If you want real power without the headache, skip the intake for now and focus on the air getting into the charger itself. From my experience, you'll get way more' wake-up' factor from these:

* Soler Performance 103mm Effective Throttle Body - This literally transformed my throttle response for way less cash than a full intake.
* DSX Tuning CT5-V Blackwing Lid Spacer - Basically increases the plenum volume and helps with cooling the bricks a bit.
* Lingenfelter Performance Engineering 15% Overdrive Supercharger Pulley - If you're gonna do a pulley, go with Lingenfelter; it's rock solid for dailying.

I mean, the factory airbox is actually decent... just drop in a high-flow filter and spend that saved money on a professional dyno tune. It's highkey the best way to keep things safe and reliable. gl!

Did this last week, worked perfectly