Hi Chaps,

I was looking at options to remap\chip my 2005 4.2 SC. My main goal is for economy not more power\torque.

I am struggling to get 10mpg in the city even following the recommendations, i.e light right foot, lots of coasting, putting the car into neutral when stopping at traffic lights, tyre pressures, etc. Although I am only a weekend driver I thought optimising the ECU may help.

There are a couple of vendors which seem to tick the boxes:

SuperChips
PowerChips
bhpuk

All claim to offer more power\torque with increased fuel economy.

Anyone had any experience with chipping\remapping a 4.2 SC?



Gareth
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the only way to improve the fuel economy of a s/c is to take the bus..

...or lpg and of course regular servicing..

i've never heard of a remap that will give you more mpg.. ... - .- -.




Y. O. L. O.
.

Mine is remapped with a K&N air filter and a supercharger pulley upgrade.

I haven't tried a remapped S/C with no other changes and many believe a remap offers very little benefit. I tend to agree, but it does appear to make the most of the pulley upgrade.

My advice is to get your pulley done first. The cost is about the same as the remap. The pulley mod will really lift your bottom-end response. Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

10mpg

That seems low, even for an SC....

Diagnostic and service would be my first port of call.

I am no LPG expert but I have heard that LPG is not ideal on supercharged cars, something to do with engine temperature ? Is this where I put the car details and a bit about myself ?........

Stop/start about town, 10mpg isn't unlikely.
 Got - 2017 SDV8 Autobiography in Loire Blue
Had- 2008 TDV8 Vogue SE in Java black
Had - 2007 S/C in Stornoway Grey

Check for infamous sticking rear brakes perhaps ? Common on SC

I also think 10 mpg sounds low. Mrs E4 does lots of stop start, short runs , and it's more like 14mpg...

I also looked at superchips etc , you only have to look at their before and after graphs to see how little difference it makes

I am considering the Terraclean process , read plenty of people who think it has helped them ?

http://www.jaguarforum.co.uk/f30/full-disc...46057.html Alcohol and eBay is never a good mix

2006 4.2 Supercharged, Java Black

Cheers for the helpful suggestions guys,

I agree 10 mpg is not unexpected but does sound a bit low. I swear I used to get closer to 14 before my gearbox was reconditioned and LR 'updated' the software.

It drops as low as 6-8 if I go into central London. I need to figure this out before I start adding on extras - As good as they sound, I will leave the filter, pulley and ECU remap for another day. I know from experience as soon as you go down that path it is hard to stop

I've just had her serviced so will take it back to get the gearbox work reviewed and the sticking brakes sounds interesting and possibly a Terraclean in the future.


Cheers

Bellini wrote:

Mine is remapped with a K&N air filter and a supercharger pulley upgrade.

My advice is to get your pulley done first. The cost is about the same as the remap. The pulley mod will really lift your bottom-end response.

Upper.

I used a well-reputed Jaguar specialist near me for the work and went with their recommendations. I used TL Jaguar in Arborfield, near Reading.

The modifications on other members' S/C's are also well documented in this forum. It's well-worth doing a search and reading the other posts.  Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.

Sounds good. Not sure what you have started!

Now I am spending my days at work trawling upgrade sites.

This place looks very tempting: http://www.paramount-performance.com/Range-Rover/  Blessed with a FFRR S/C

I don't need it I don't need it I don't need it  2008 MY Supercharged
Rimini Red / Jet
four zone climate
remote park heater
and no ugly kid windows.
magnus satis quod turpis satis

TL Jaguar in Arborfield - how much did they charge for the privilege and what performance upgrade did the map and pulley change give you?