Tuning alky for the first time: Get a friend and head out to the interstate, a little traveled section preferably. Get the car up to road speed and have alky set to turn on about 12 lbs of boost with 100% volume delivery. Then mat the pedal and let the car downshift into 3rd. Have friend watch Scanmaster for knock and feel if the car bogs. If there's bog, lower the volume about 10% and try again. Then when bog goes away, start raising the turn on boost point still watching Scanmaster for knock. I ended up turning on alky at 14psi with about 70% volume and it's just right. It'll take about a half hour to dial it in and you need to have the car in 3rd gear to get the highest load on the engine, hence the highway thing.
Oh and use street gas (93 or 94), 100 octane is going to mask any effects at 18psi. I run the above setting at 20psi roughly with no knock on isopropyl.