does remapping reduce mpg?

1. user_37545 Established Member Joined: Sep 2009 Southampton, UK Posts: 1908 Po-Low.

   #1 6th March 2011, 08:32

   It sounds like a silly question becasue with power comes cost, but im pretty sure on some cars you can even increase the mpg by remapping, as well as the performance (306 hdi) but its probably because its a diesel.
   
   Any advice would be great because im looking at either an s or an r remapped.
   
   its down to fuel atm...
   
   cheers
2. Saxovch22 Established Member Joined: Feb 2011 Scotland Posts: 1191 02 Saxo Vts

   #2 6th March 2011, 10:01

   Yes it does on petrol too as you can imagine a cammed cars fueling etc wil be all over the place, so a remap sorts everything out especially if it's a live map but with your bound to want to use your right foot abit more knowing you have more power under it lol
3. nath106 Frequent Poster Joined: Mar 2007 somerset Posts: 937 16v ITB'd powered S1 Rallye & 256bhp civic EG

   #3 6th March 2011, 10:21

   no it wont reduce mpg
   
   a remap will more than likely allways increase mpg. and it depends what you ask the tuner to do
   
   when my civic was last mapped i had the vtec mapped aggressively for power, and then the lower rpms for economy.
   
   theres no reason why a pug cant be done in the same way, cams normally have a high power band anyway so mapping a car aggressively down low will more than likely make no difference.
   
   
   what youll find with a remap is that youll prob save more fuel than before in the lower rpms and use more fuel than before (possibly not allways) in the higher rpms so itll balance out.

   1 user thanked this post: user_37545
4. user_37545 Established Member Joined: Sep 2009 Southampton, UK Posts: 1908 Po-Low.

   #4 6th March 2011, 10:46

   Quote:

   Originally Posted by nath106 no it wont reduce mpg a remap will more than likely allways increase mpg. and it depends what you ask the tuner to do when my civic was last mapped i had the vtec mapped aggressively for power, and then the lower rpms for economy. theres no reason why a pug cant be done in the same way, cams normally have a high power band anyway so mapping a car aggressively down low will more than likely make no difference. what youll find with a remap is that youll prob save more fuel than before in the lower rpms and use more fuel than before (possibly not allways) in the higher rpms so itll balance out.

   awesome, cheers mate.
   the car is cammed and remapped but i figured as its increased its power to that of a vts it would decrease mpg, however it does still only have half the valves..
   
   i was never sure on remapping but if it has been done right im on for a winner