MPG is improving with PSI Powerbox

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Computer was reset over 1400 miles ago after fitting PSI - MPG has been on 30.4 for some time now.

Before it was fitted, it was on 27.7
 
Simon1975 said:
Computer was reset over 1400 miles ago after fitting PSI - MPG has been on 30.4 for some time now.

Before it was fitted, it was on 27.7
Click to expand...

Have you done a tank brim to brim check against the trip mileage? You may find that since you fitted the PSI box the fuel consumption computation on the dash is over stated by 2 or 3 mpg, at least that seems to be the case on mine.
 
Datatek said:
Have you done a tank brim to brim check against the trip mileage? You may find that since you fitted the PSI box the fuel consumption computation on the dash is over stated by 2 or 3 mpg, at least that seems to be the case on mine.
Click to expand...


I have not. I'm happy to believe it in all honesty. :)
 
I just recently fitted a PSI Powerbox to my P38 (BMW) and the the car does appear to be giving improved MPG according to the display but I question that it knows what the Powerbox is doing.

My point is not about that though.

I drive very carefully most of the time, like an old codger (because I am) to try and maximise MPG - but I can't get near 27.7 MPG - how do you do that? Do other people get that as well? Is it long journeys at 55 on the motorway or what?

I'd be interested to know what others get.

Thanks
 
31 ish at 70 on Motorway/Dual carraigeway
23 towing 1 1/2 ton powerboat Motorway/Dual carraigeway at 65 ish
19 around town

After fitting a Powerbox type of device I can't see how the onboard computer can give a true fuel consumption reading as the ECU is now unaware of the real injector opening times
 
f1roborbob said:
I just recently fitted a PSI Powerbox to my P38 (BMW) and the the car does appear to be giving improved MPG according to the display but I question that it knows what the Powerbox is doing.

My point is not about that though.

I drive very carefully most of the time, like an old codger (because I am) to try and maximise MPG - but I can't get near 27.7 MPG - how do you do that? Do other people get that as well? Is it long journeys at 55 on the motorway or what?

I'd be interested to know what others get.

Thanks
Click to expand...

I get about 25/27mpg around and about on the empty roads here in France sticking to the speed limits. It goes down when my lead footed wife drives it:eek::eek::eek: I do take advantage of the ability to coast to a stop that you get on an auto when the torque converter unlocks. I also watch the computed mpg figure which I reset each time I fill up. This makes it possible for me to modify my driving to maximise economy.:D


On the autoroute cruising at 130Kph (80Mph) it does better than 30mpg. Amazing for such a heavy un-aerodynamic car:D:D:D
 
Just left a reply but it seemed to disappear into the ether!

Mine a BMW 2.5 auto, has 23.4 mpg on display and not reset for 10000 miles (about a year)

Handbook says 20.3 Urban, 30.7 extra urban and 25 8 combined. I would have thought that was as good as it gets because I am sure Land Rover (and all manufacturers) quote figures as high as possible.

The 23.4 is at least 40 % towing (a 1500 Kg Caravan) so it seems about right compared to LR figures - but perhaps not compared to some numbers quoted.

Would be interested in any other views - and how accurate are the displayed figures anyway - Thanks Chaps
 
Used to get an average of 22mpg out of mine overall but most of it was knocking about with a twice yearly troll up to Scotland towing a 21ft Hobby. I think the most I ever got 'on a run' was around 27 but I must admist I never used to drive it with economy in mind. I used to find the onboard mpg display reasonably accurate and the same on the 4.6 I have now. The times I checked it brim to brim it was certainly within 1 mpg or better.
 
f1roborbob said:
Just left a reply but it seemed to disappear into the ether!

Mine a BMW 2.5 auto, has 23.4 mpg on display and not reset for 10000 miles (about a year)

Handbook says 20.3 Urban, 30.7 extra urban and 25 8 combined. I would have thought that was as good as it gets because I am sure Land Rover (and all manufacturers) quote figures as high as possible.

The 23.4 is at least 40 % towing (a 1500 Kg Caravan) so it seems about right compared to LR figures - but perhaps not compared to some numbers quoted.

Would be interested in any other views - and how accurate are the displayed figures anyway - Thanks Chaps
Click to expand...
23 towing is good, i used to get 21 towing, 25 and upto 38 on m'way that was chipped but never checked brim to brim
 
Hi Simon and others,

I don´t have my DSE remap yet:(

But I know from research and from a friend of mine, is average is 9,0 liters/100 (sorry don´t know conversion to MPG), in town and open road. So MPG is better after the remap.

So, and for the people who read the 10 pages, and get some :confused:, like me ;)....

If you drive your remap RR like it was before remap, you get better MPG period:p
 
tomcatrr said:
Hi Simon and others,

I don´t have my DSE remap yet:(

But I know from research and from a friend of mine, is average is 9,0 liters/100 (sorry don´t know conversion to MPG), in town and open road. So MPG is better after the remap.

So, and for the people who read the 10 pages, and get some :confused:, like me ;)....

If you drive your remap RR like it was before remap, you get better MPG period:p
Click to expand...

Yes and if you don't you get less MPG period.
 
OXO said:
And if you fit it, then drive like you did before, then what was the f****** point in fitting it?
Click to expand...


Well none really. Maybe drive normaly would be a better way of putting it. Because if you fit one and drive around like a prat, using the extra power all the time YOU WILL use more fuel. Simples.
 
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