Engine rpm: When using stock cast pistons, the engine should be limited to a maximum of 4,500-5,000 rpm.3-5 psi boost level: This range of boost has proven to be the best compromise for power and reliability for engines using cast pistons, cast crank, and small cam, according to Weiand.7.0:1 to 9.0:1 static compression ratio, with an effective compression ratio below 12.0:1 (review Boost Basics Part 2 to learn more about effective compression ratio): The optimum static compression ratio is 8.0:1.Let’s first review Weiand’s recommendations for stock engines to see if upgrades will be necessary: Supercharger Guidelines for Stock Engines The extent of these modifications will depend entirely on how the engine is to be used. If you want to take your boost and/or engine rpm past Weiand’s recommended threshold for stock engines, you’ll need to make some modifications to your induction, ignition, and engine. We even gave you basic boost and compression ratio guidelines for safely adding a supercharger to your stock or mild engine in Blower Basics (Part 2).īut what if you want to take your engine beyond stock or mild?
In Blower Basics (Part 1), we debunked the myth that a supercharger is an exotic upgrade.
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