Hi guys, looking for some advice regarding the JB4 before I bite the bullet;
1. How do you switch between maps 1-8 (or however many there are)? Laptop every time if I don't purchase the Bluetooth hardware & software?
2. I noticed that you have to puncture a rubber bung in the bulkhead for an OBD2 connection - my understanding was that there were only 3 connectors to disturb (camshaft, boost & MAF sensors) - what does the OBD2 connection do?
3. Where does the JB4 unit receive its power supply from? Is it picked up from one of the wires in the loom or do you have to tap into a 12V source?
PS cracking thread @OliS3
1) you can use a laptop with the free software. You’d need to buy a cable tho. There’s only 3/4 maps which are useful for a normal person.
Map1 - lower boost map (wouldn’t ever bother with this unless you put in 95 Ron)
Map2 - higher boost map (99 Ron needed)
Map0/4 - bypass map - bypass with logging.
Map6 - custom map boost per rpm.
If you want a set and forget set up then set it to map 2 using a cable and laptop and forgot about it. If you want a map 6 and tune yourself then the Bluetooth and app are better imo.
2) Rev 2 units (latest models) have 3 connectors to the engine. 2 at the top and 1 under the bottom which can be pain to get too. An AFR tap and an obd connection. These allow for more boost and a smoother ride. If you don’t use these then the JB4 will stay on a stock map similar to map1.
Obd connection isn’t hard at all to get into the cabin.
3) Power is picked up from the engine connectors. No 12v direct feed line needed, unless you’ve got the Bluetooth module then you can run it to the battery with a small 1amp fuse which is what I have done. (I have the older rev1 unit, so its smaller and fits in the battery cover with the Bluetooth dongle).
With a proper set up map 6 and bolt on mods you can get about ~400bhp.