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dannyp15

Member Since: 21 Sep 2011
Location: essex
Posts: 244

2004 Range Rover Autobiography 4.4 V8 Alaska White

4.4 petrol lpg remap

my friend who fixed my car and serviced the lpg said it would be a good thing to get it remapped as well as he said i could get 30-40 bhp more and 5mpg better as well because the gas is 100 something ron he said thats how you can get that massive boost of bhp

any thoughts on this

4.4 petrol/lpg

12th Oct 2011 4:51pm

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

It always intrigues me just how you can get more BHP and more MPG with a remap

12th Oct 2011 5:00pm

dannyp15

Member Since: 21 Sep 2011
Location: essex
Posts: 244

me to but its all about getting the most out of your ecu

12th Oct 2011 5:01pm

stan
Site Moderator

Member Since: 13 Jul 2010
Location: a moderate moderated moderator moderating moderately in moderation
Posts: 34920

afaik there are two types of mapping, one for more power and the other for more mpg...each map is individually tailored to one or the other.. ... - .- -.

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12th Oct 2011 5:03pm

dannyp15

Member Since: 21 Sep 2011
Location: essex
Posts: 244

you can get it in between the both so you can get both mpg and bhp

12th Oct 2011 5:05pm

stan
Site Moderator

Member Since: 13 Jul 2010
Location: a moderate moderated moderator moderating moderately in moderation
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that would be standard then...i dont think you can tbh...when i had mine done the bloke asked which one i wanted and didnt give any other options.. ... - .- -.

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12th Oct 2011 5:07pm

dannyp15

Member Since: 21 Sep 2011
Location: essex
Posts: 244

he also said its much smoother through the gears and more responsive

12th Oct 2011 5:08pm

stan
Site Moderator

Member Since: 13 Jul 2010
Location: a moderate moderated moderator moderating moderately in moderation
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thats one thing a map does it makes the gears kick in differently for mpg and for power..for instance for the mpg map the higher gears kick in quicker so you use less fuel.. ... - .- -.

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12th Oct 2011 5:11pm

Rob2529

Member Since: 22 Nov 2010
Location: Wirral, uk
Posts: 1470

Danny,
Someone once said "if something sounds to good to be true, it usually isnt." This kind of fits what you have been told. I would be happy to be proven wrong though. A few garages do offer a try before you buy type thing. might be worth chatting to your mate and get him to do that. Do the map, if its no good or not what he says get him to put the old map back, if it works you can hand over the money. [img]http://www.fuelly.com/driver/rob2529/range-rover[img/]
04, 4.4V8, Vogue Oslo Blue with LPG.
"You can sleep in your car, BUT you can't race your house!!!!"

If something can't be fixed with a hammer....... You have yourself an electrical fault!

12th Oct 2011 7:12pm

bozmandb9

Member Since: 06 Dec 2010
Location: Wallingford, Oxfordshire
Posts: 1020

Rather than a remap, what you could do is get your cats removed! This could give you a power boost and better mpg!

Big J is your map for remaps. Range Rover-less at the moment - Pining!

12th Oct 2011 7:55pm

ric355

Member Since: 02 May 2011
Location: Surrey, UK
Posts: 302

Re: 4.4 petrol lpg remap

dannyp15 wrote:
my friend who fixed my car and serviced the lpg said it would be a good thing to get it remapped as well as he said i could get 30-40 bhp more and 5mpg better as well because the gas is 100 something ron he said thats how you can get that massive boost of bhp

any thoughts on this

4.4 petrol/lpg

You won't get a massive boost in power. The theory is basically correct - the RON rating of fuel refers to its ability to resist pre-ignition. A higher RON fuel allows the ignition to be advanced which can help the engine generate more power, but two things to consider: (1) The effect will be virtually nothing without changes to the induction and exhaust system, and (2) if you remap for 100 RON fuel then you need to run on 100 RON fuel all the time, so if you switch back to petrol you'll lose power and if it's 95 RON then probably get pre-ignition under high loads which will damage your engine.

At best I'd say it'll be worth 5-10hp on a cool day and it's not worth it. You won't even notice with an auto box.

It's a different prospect for a turbo engine as you can just increase the boost and chuck more fuel in for a remap, and also advance the ignition for higher RON fuel but you're still stuck with that rating of fuel post-mapping.

A remap will eliminate flat spots or remove restrictions that have been inserted for efficiency or emissions reasons, but these things will just make it use more fuel to deliver more power. Practically speaking you can't have both more MPG and more power at the same time (unless you change the design of the engine!).

12th Oct 2011 9:37pm

kingpleb

Member Since: 07 Jun 2011
Location: Maybe here. Maybe there, I get everywhere!
Posts: 8455

The only real way to do this with log is a better induction kit, and he cats ripped out then the remap

This from someone who has had lots of power from an lpg installation but with other tweaks as well...

12th Oct 2011 9:51pm

BBS SPY

Member Since: 20 Apr 2009
Location: Limassol
Posts: 101

Remaps can, and have been debated until the cows come home.

It seems to be highly competative and very dynamic industry, invoking much argument and opinion on any and every forum and is truly a moderators / forum owners nightmare.

IMHO most remaps can possibly smooth out power delivery and produce extra power and / or economy depending upon how the vehicle is then driven.

But when i first got mine, from possibly the most respected and renowned there is, the improvement in performance was pathetic and worst still my vehicle started to smoke very badly on any acceleration.

I quickly learned that a remap does not provide any kind of quick fix to poor power delivery problems from an existing situation, and actually high lights any existing problems.

I don't know how long the split in my Intercooler hose had been there, but it was a simple 10 quid 2 minute fix, and a mini service replacing what looked like a bit of carpet for an air filter was also cheap and quick to do. I was also astounded to discover how much crap was stuck on the front of my Intercooler, dead birds, feathers and leaves to name but some.

The results of a simple bit of cleaning and maintenence were simply astounding.

I am personally an utter lead foot kinda guy, and truly appreciated the very impressive GTI like appeal of my own TDV6 remap until all the petrol stations closed and i was forced to see how far a tank would actually take me when used in moderation, which was equally impressive.

IMHO getting a remap is a no brainer, regardless of if you want better performance or economy, but it is no substitute for poor maintainence. 2003 4.4 HSE

13th Oct 2011 7:47pm

BigJ

Member Since: 16 Mar 2011
Location: North Yorkshire
Posts: 247

2005 Range Rover Vogue 4.4 V8 Stornoway Grey

Mine is a 4.4 V8 BMW M62 engine and remapped by me.

It is also LPG.

It is tweaked to the gas and has sharpened it up and most importantly sorted the throttle pedal being so dull.

I will be improving it further as it still needs a bit more at lower RPM.

I'm very pleased with it. Used to have:
2005 FFRR 4.4 Vogue - BRC LPG Conversion & Remapped

Now have:
2008 SSRR 3.6 TDV8 - HSE and plenty of toys

14th Oct 2011 10:08am

A1GSS

Member Since: 24 Dec 2010
Location: Saffron Walden, Essex
Posts: 1973

How are you doing your own mapping? Graham

____
Gone: 10MY L320 RR Sport HSE, Ipanema Sand
Gone: 20MY Jaguar iPace HSE, Silicon Silver
Gone: 17MY RR Evoque SE Tech, Loire Blue
Gone: 08MY Discovery 3 XS, Stornoway Grey
Gone: 07MY FFRR TDV8 Vogue, Stornoway Grey

14th Oct 2011 12:03pm

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