C6 ZR1/LS9 Supercharger Boost Calculator

Curious about what changing your upper and lower pulleys will do to your boost levels on your 2.3L LS9 supercharger? Use the following boost calculator/estimator as a rough guide to see how to right-size your boost for your desired power level.

The 2.3L LS9 supercharger came stock in the C6 Corvette ZR1 and is becoming a popular addition to both modern and resto-mod LS motors.

Note that boost levels depend on a variety of variables (including temperature and humidity) and this is simply an estimate based on a linear math relationship between stock boost and upper/lower pulley adjustment. This calculation assumes NO OTHER MODS beyond pulleys. Any pulley changes will require a tuner to get the most of our your aftermarket mods.

We recommend LS9 GripTec upper pulleys.

Quick FAQ

Q: What's the stock boost level of the C6 ZR1 blower? A: ~10.5 PSI

Q: What's the stock C6 ZR1 blower size? A: 2.3L

Q: What's the stock C6 ZR1 upper pulley diameter? A: 3.10"

Q: What's the stock C6 ZR1 lower pulley diameter? A: 7.33"