Performance Guides And Tools
We've tried to boil down the GM part numbers, casting numbers and other LS cylinder head information into an easily usable (and ideally definitive) cross reference.
Curious about what changing your upper and lower pulleys will do to your boost levels on your 1.7L LT4 supercharger? Use the following boost calculator/estimator as a rough guide to see how to right-size your boost for your desired power level.
Curious about what changing your upper and lower pulleys will do to your boost levels on your 1.9L LSA supercharger? Use the following calculator as a rough guide to see how to right-size your boost for your desired power level.