17-08-2012, 07:17 AM
^^^That, makes for very interesting reading! 
I was also under the impression that mpg rises after a remap due to the mass produced maps having to meet emmisions regs (but only Euro3 on hdis iirc) and wide temp bands.
The mpg did noticeably rise on my PD after the remap, as did the optimal cruising speed, and I can only guess this is due the increased boost pressue (its now better to cruise at 60 than 50, and have an increase of about 5mpg on a tank average now).
I was also under the impression that mpg rises after a remap due to the mass produced maps having to meet emmisions regs (but only Euro3 on hdis iirc) and wide temp bands.
The mpg did noticeably rise on my PD after the remap, as did the optimal cruising speed, and I can only guess this is due the increased boost pressue (its now better to cruise at 60 than 50, and have an increase of about 5mpg on a tank average now).