Jb4 in sydney

[F45m3]

Hi guys,

Looking at doing the jb4 or the job stage 1 on my f80 M3.

Its stock at the moment and not looking at doing anything to it for now.

Who's running either? Whats your opinion on either? Where did you purchase it from?

[domino_z]

the JB1 is older tech now being an 8 bit processor, so it's not the smoothest implementation of a piggy back on this platform anymore - other than marketing exposure, i can't see why anyone would still choose it over say the newer turner or active 8 pb's that use 64 bit processors

[Stuart@BMRAutowerkes]

I've installed both alongside numerous ECU tunes on the F8X platform. The ECU tunes outperform the piggybacks, that said the JB1 is excellent bang for buck. You can definitely notice the gains and the power curve is basically a replica of stock.