Cam basics for those deciding on what to choose.
A new cam can make more power, same or more mpg, and add a mean idle sound.
Downside: They can make worse mpg, more stumble at low end street rpms, don't make enough vacuum to effectively power the brake booster, and greatly increased wear on springs and valve tips and guides. Installation isn't as simple as e.g. a CAI and likely requires new springs.
A supercharger cam should have a wider angle and less overlap with the lobes. This is because the intake charge is pressurized and will blow out thru an open exhaust valve if they are open at the same time. On a naturally aspirated motor it takes more time to get the intake air moving and this is less of an issue except long overlaps. Don't buy a naturally aspirated cam for your supercharged engine. You do want negative overlap (both valves are closed for some #of degrees, say 1 to 10+ at least).
Higher lifts often give more hp and not negatively effect mpg or driveability, but one famous cam maker has user reported valvetrain damage on LSA engines from their unusually high lifts (GT...)
Longer durations on the lobes where the valves are open give the hp but are limited by overlap which is a bad thing.
As you know a cam with a very choppy idle, often called stage3 (more overlap) struggles against the automatic transmission torque converter pulling on the engine at idle speeds or slightly above idle. A poor "fix" is to raise the idle speed (better is a looser high stall torque converter). This causes more heating of the trans fluid as the torque converter is trying to pull the car against the brakes at a stop. Power brakes may work poorly with the low vacuum due to the cam.
Brian Tooley Racing has good honest descriptions on their cams and people have had good results, here is the link to their cams. I just saw he revised their stage 3 cam to make less maximum top end power but a much better street cam. That is something to keep in mind watching the youtube videos of choppy idles or reviews of streetability if it is the old or new grind.
https://www.briantooleyracing.com/bt...am-motion.html
https://www.briantooleyracing.com/ne...m32346176.html
Old grind stage 3 BTR - Stage 3 Camshaft (LSA/LS9) Specs: 231/248 .617"/.595" 120+5
New stage 3 grind 223/246 .610"/.600" 117+6
Our LSA engines had a factory cam that is not very performance oriented. That's why there is so much performance gain in a properly ground cam installation. They should have given us at least the LS9 cam. Likely they didn't because they always try to rate the camaro engines with less hp that the corvette's to justify their price.