I've searched for something on this, on HMT and on regular search engines, but I can't find anything.
Are there any stand alone management systems, or even piggy-backs (aside from the AFC hack) for OBD II vehicles?

 

You can put OBD1 piggy back units on obd2 cars if you switch out the harness and ecu for obd1 versions. Don't know if this addresses your question or not.

 

Sort of...but for those who don't want to convert to anything that's obd1...is there anything out there?

 

yeah the afc hack works on odb2. you can run about ~11psi ro so w/ it rather safely if you drop your timing a degree or two, maybe three. 10,000miles hacked on my car, still going strong!

 

Yeah, I'll be doing the hack soon (retard 3 degrees, eh?)...I've got the SAFC ready to go in....I was just curious if there was something bigger that could control a lot more.

 

3 degrees may or may not work on your car. Every engine and turbo setup is different, and you may need to go more or less depending on how it runs. Don't take that number for gospel. But you will need to retard it some, how much just depends on your setup/engine. You may want to check into Greddy Emanagement to see if it works on obdII. It might, but I don't know.