Drilled airbox

[Mew]

This is nuts. My car was only recently tuned by john mitchell of JMR racing and when MOT'd the emissions were almost perfect. I can't understand how some of us struggle to reach 28-30mpg while others are returning 40+ from their cars??
i usually get 25-28 (sometimes 30-31 when stupidly careful IE not revving above 2500 etc)

Or they're basing their figures on a 15-20 year old computer reading! 

[tom26]

^

[kyle]

hmmm well i struggle to get 24mpg out of mine - was doing 15.5 down the motorway the other day

[vw-bob]

how to you guys get a mpg reading? is it something on the gti that i dont have on the driver?

[cняis]

yes, we have the (now not so) trusty MFA onboard computer 

[monzablue16v]

I worked mine out the proper way because my 20 year old computer is fubared my timing was one tooth out when I stripped the engine down timed it properly and it's back to where it was when I bought it and the MFA worked to .3 of an mpg. Need to fix that next on a valver the mpg should stay the same as the same amount of air passes the metering head so it will still inject the same amount of fuel on an 8v witchraft electric thing the maf will see all this new air and ramp up the fuel to match. 

[Ben Lessani]

My fuel consumption goes a bit all over, I managed about 40 going to manchester, went about 60 the whole way, then on my recent trip down, I did about 230 miles in 2:27 and being diffcult to judge because the fuel needle only ever goes 3/4 up and the MFA says I'm doing 65mph @ 12mpg. Next time I fill the tank I can say...but 40 is a dream for me - I think I enjoy driving too much to try and hit the dizzy heights of 30+ mpg.

[tom26]

enough of this talk of 'miles to the gallon' anyway, if we were that concerned, diesels or 1.0L petrols would be a wiser choice??!  running old expensive cars is more about SMILES per gallon.

[T_J_G]

enough of this talk of 'miles to the gallon' anyway, if we were that concerned, diesels or 1.0L petrols would be a wiser choice??!  running old expensive cars is more about SMILES per gallon.

but when you can't afford the money to get smiles per gallon,it's a bit of a problem...ican't afford any petrol to stick in my car  at the moment:sad:

[Simpson]

so how is it that we get more than the book figure, i can honestly say with average driving on b roads i can get 36 mpg, and that is worked out from tank to tank but 40 mpg, i cant believe that. as the book figure is only 29.6 or something.