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Ok got my jrsc kit. Dude gave me a bunch of extra parts. Some, I don't know what they are. Here's a big one. Only engine management the jrsc came with is msd btc and powercard. Now what the hell is this?! http://img.tapatalk.com/d/13/08/12/aduzu4uj.jpg
Back in the 90s there were numerous engine management "solutions" that shipped with the JRSC and other early Miata superchargers. Some were pretty strange like the Kenne Bell Boost-A-Pump.
I swear that black box looks like a Radio Shack car alarm.
I have the same answer as your other post. Email Gary at TrackDogRacing dot com.