Re: 156 JTS Chip/Remap recommendations
You wont get any data from ALfa on the JTS problem.
The JTS produces more power than the TS principally because it has a higher compression ratio, due to the shpae of the pistons (Which are different to the TS pistons mainly beacause of the shape they need to be for direct injection)
What I was told was that the pistons for production were not within tolerances and the extra compression simply wasnt there. This may be guff, but would possibly explain the crap dyno figures experienced.
Remaps on normally aspirated cars are mainly down to ignition advance/ optimistaion, but this doesnt really work on the JTS as there is a very narrow window in which the mixture will ignite (think about how it works)
The principle way the JTS works is more power/load = more vacuum, the vacuum is picked up by the MAF as a mass air volume and is proportional to fuel pressure, this actually keeps going and going, so far in fact that if you supercharge it, you dont need to remap it, it gets more air volume - and delivers more fuel pressure.
Hope this helps, speak to Jano at Autodelta for what your options.