I fit's a street car that has to pass emissions I wouldn't do it. Running 38* at idle is alot , 22* on a turbo car isn't as bad. If it was a N/A car I would just fix it. On mine I removed thje springs and wired the weights together. Someone else here has also done it but did another method. As for what RPM to set it at, it doesn't matter as it will hold it from idle to redline. If it's an N/A motor you'll want around 35-38* , if it's turbo 18-30* depending on boost, turbo, fuel ect. I ran 22*.