Joel Grannas has no problem changing his racing program to gain a competitive advantage. Now, Grannas is dialing up the innovation by ditching the turbo system on “Peeled,” his 2JZ-powered Mustang, and replacing it with a Compressed Air Supercharging (CAS) system.
When Grannas brought Peeled out to Bradenton Motorsports Park for the first time, it reset the H-pattern stick-shift record before a top-end crash parked the Mustang. Grannas got the Mustang ready for FL2K, and it showed a lot of promise before the 2JZ powerplant experienced a catastrophic failure.
Grannas teased a new combination on social media, but nobody expected to see a CAS system installed on the Mustang. You can learn more about CAS systems right here.
So, why would Grannas make the switch from a proven turbo system on a 2JZ to a CAS system? It all comes down to boost and spooling up a big turbo with a small engine.
“Well, the one thing we have a problem with this car on a turbo setup is boost. So, we have to run a giant turbo to make 2,800 horsepower. And to make 2,800 horsepower on a little tiny engine like this, you have to rev it out. So, we have to leave the line at like 6,000 RPM because to get that turbo spooled up on the line, that’s what you need to leave with.
“With a compressed air supercharger, your turbo is in a bottle. It’s super cold, dense air. It’s not heated like a turbo air would be. So, you got the advantage of super cold, dense air, and you have it on demand whenever you want it. Open the bottles. Bam. You have 30 pounds of boost whenever you want it,” Grannas explains.
Another advantage to using a CAS system with a stick-shift car pertains to the application of horsepower. A typical turbo system on a stick-shift car will experience a loss of boost each time you shift the car. With a CAS system, the boost is provided on demand each time you depress the throttle.
In this video, Grannas shows you how they got the CAS system that uses a total of four bottles to fit in the Mustang and how they overcame a few challenges along the way.
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