grill block and lean burn really working for me

[modmonster]

hi

i've noticed in my fuel log (on excel sorry) that i've really made a difference to my short trip FE. i do a weekly motorway journey and my graph used look like a square wave because of my lower FE commute! now my graph is flat any i'm getting almost as good FE on my short journeys as on my long trips. last month i fully grill blocked my ride with a removable block and introduced a lie box for lean burn. i think the grill block heat benefit is helping the heat lost from not running rich. the car is noticeably colder in the mornings so maybe a block heater would help too.

i've tried a few lie box settings now and it seems to make a big difference on my short commute FE but very little on my motorway FE?

[FastPlastic]

What kind of gains have you seen? MPG's before and after mods?