Jason from Tennessee is running our Blue Belt Performance Package plus fuel cam. He wanted to see how far he could go without ethanol or methanol, so we connected for a remote dyno tune. Final results were 619 whp and 686 wtq on race fuel. Next Jason plans to upgrade his LPFP and put this car into the nines. Stay tuned!

Steven from Ohio originally chose to work with one of our competitors. However, things got expensive quickly when his stock turbos destroyed themselves within just a couple weeks. He replaced the turbos with some aftermarket ones and the same thing happened less than two weeks later. This time one of the impellers went through the engine and completely destroyed everything in it’s path.

Our team offered to help and took the car in. We have tuned hundreds of these cars worldwide, and have never seen turbos come unglued like this. When we pulled the tune, we noticed the previous tuner had completely maxed out the turbocharger wastegate duty cycle table. If you don’t know how to tune with finesse and turn all the knobs up as far as they will go, you can actually spin the turbos fast enough to destroy themselves.

We replaced the long block assembly and switched to genuine Caddy Issues turbos. After the engine was properly broken in, we spent a day on our dyno working up one of our famous calibrations. As you can see, boost and power are now smooth all the way to 7,000 rpm. Peak power was 691 whp, still running OEM compressor inlets.

Dane purchased almost all the ingredients for our unmatched Brown Belt Performance Package, and did an excellent job installing everything himself. Then he drove in from Illinois, and we got to work on our DynoJet. Once again, Caddy Issues turbos delivered, making 700 plus whp from 5,300 to 6,500 rpm! Dane’s still running factory camshafts, so we weren’t yet able to unleash the full potential of these turbos. Stay tuned for more from Dane…

Charley had a good friend drive his car up from Florida to our shop in Ohio for the Blue Belt Performance Package. After installing Green high performance air filters, Gigs ported throttle body, Brisk silver racing spark plugs and Tapout resonated downpipes, we strapped the car to our DynoJet and got to work on the tuning. Peak power increased from 416 to 546 whp, with more power at every single point across the rpm range. Multiple 546 whp pulls were done back to back using E30 fuel and a custom calibration map that we created in house. We also provided a 93-octane map in case he isn’t able to locate an E85 station on his 1,118 mile trip back home.

Our team has worked tirelessly to create and develop the best possible performance parts, tuning and complete performance packages for the CT4-V Blackwing cars. We’ve made some incredible progress for a car that was originally thought to be ‘completely untunable’. Since August 2021, Tapout Tuning has been the innovator and always led the charge in this platform. Stay tuned, because there is more to come…

What takes 15 months, 11,000 street miles, 228 dyno pulls and eight track days spread over Florida, Texas and Ohio? Crushing the 700 whp barrier for the first time ever with a CT4-V Blackwing. Today we reached a new milestone with the Brown Belt Performance Package on our flagship car when it achieved peak power of 710 whp, which is 300 whp higher than stock!