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Home > Puma (Tdci) > Remapping a 2.4 TDCI - What does it actually mean?

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The Boy

Member Since: 28 Aug 2008
Location: East Northants
Posts: 1459

2009 Defender 110 Puma 2.4 XS CSW Rimini Red

It just interested me but as you say probably as much good as a ashtray on a motorbike for a TD, but I thought I'd ask anyway as I am sure someone will explain properly.

6th Nov 2012 1:21pm

o4dn

Member Since: 08 Jan 2010
Location: South West
Posts: 541

2009 Defender 90 Puma 2.4 SW Alaska White

ofourdan wrote:
bell-auto-services wrote:
[...] The point im politley trying to make is this, the PCM/engine ecu RECEIVES signals re fuel and speed NOT gives them out so a remap CANT mistakenly or intentionally alter any diagnosticly read MPG calculating tools given output figure.

Fair enough, yet I would politely report that I can reproduce any time, changing the map does confuse the ScanGauge MPG calculation and requires recalibration.

I've since read elsewhere that disabling the EGR does make a lot of difference in the way the ScanGauge calculates the MPG, maybe that's not the remap itself that changes the calibration, but the EGR shut? That would match my observation, as the MPG is off even when using the standard map + EGR off.

Pete, would that make more sense?

6th Nov 2012 3:08pm

Molusk

Member Since: 20 Dec 2011
Location: Loire Valley
Posts: 43

2008 Defender 130 Puma 2.4 HCPU Alpine White

ofourdan wrote:

I've since read elsewhere that disabling the EGR does make a lot of difference in the way the ScanGauge calculates the MPG, maybe that's not the remap itself that changes the calibration, but the EGR shut? That would match my observation, as the MPG is off even when using the standard map + EGR off.

Pete, would that make more sense?

On my side, I do not have any remap, but a ScanGaugeII indeed.
I noticed a much better MPG reported by SGII while driving with EGR disconnected.
And during my trip to Iceland (very long runs on highways, at steady speed), I had the opportunity to verify that MPG values were very accurate.
I only refer to the MPG gauge, and not to the "Trip" features, as I never did the refill calibration process.

6th Nov 2012 3:25pm

bell-auto-services

Member Since: 08 Jul 2007
Location: North Yorkshire
Posts: 2232

2013 Defender 110 Puma 2.2 USW Orkney Grey

It may be that the EGR closed does produce a better MPG on some cars yes, this is may be why the scanguage shows a gain. i doubt that the closed egr can make the scanguage read wrong as its not directly connected to the engine ecu.

Pete

6th Nov 2012 3:38pm

ZeDefender

Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

2011 Defender 110 Puma 2.4 SW Baltic Blue

Can we agree that IF the fuel figures are accurate when I next fill up (60 litres of fuel should give a decent estimate) that SG is probably calculating consumption accurately, or is there some other theory about it getting the distance wrong or even forgetting the formula?

Pete, if it comes to it, would you consider modifying my map to switch EGR on so I can do a direct comparison?

Matt Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...

6th Nov 2012 5:12pm

Japseroony

Member Since: 02 Jan 2008
Location: North East England
Posts: 807

2016 Defender 110 Puma 2.2 XS CSW Montalcino Red

ofourdan wrote:
ofourdan wrote:
bell-auto-services wrote:
[...] The point im politley trying to make is this, the PCM/engine ecu RECEIVES signals re fuel and speed NOT gives them out so a remap CANT mistakenly or intentionally alter any diagnosticly read MPG calculating tools given output figure.

Fair enough, yet I would politely report that I can reproduce any time, changing the map does confuse the ScanGauge MPG calculation and requires recalibration.

I've since read elsewhere that disabling the EGR does make a lot of difference in the way the ScanGauge calculates the MPG, maybe that's not the remap itself that changes the calibration, but the EGR shut? That would match my observation, as the MPG is off even when using the standard map + EGR off.

Pete, would that make more sense?

Does the SG show EGR values

Gas, Grass Or Ass - Nobody Rides For Free

"UNDERSTEER" ----is when you hit the fence with the front of the car.
"OVERSTEER" ------is when you hit the fence with the rear of the car.
"HORSEPOWER" ----is how fast you hit the fence.
"TORQUE" -----------is how far you take the fence with you.

6th Nov 2012 5:23pm

o4dn

Member Since: 08 Jan 2010
Location: South West
Posts: 541

Japseroony wrote:
Does the SG show EGR values

Yeap

6th Nov 2012 5:24pm

ZeDefender

Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

Yes - led to some "discussion" in the past - just finding the thread

Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...

6th Nov 2012 5:25pm

Japseroony

Member Since: 02 Jan 2008
Location: North East England
Posts: 807

ZeDefender wrote:
Yes - led to some "discussion" in the past - just finding the thread

How do you re-calibrate the SG and does it only use fuel used and distance travelled? Gas, Grass Or Ass - Nobody Rides For Free

"UNDERSTEER" ----is when you hit the fence with the front of the car.
"OVERSTEER" ------is when you hit the fence with the rear of the car.
"HORSEPOWER" ----is how fast you hit the fence.
"TORQUE" -----------is how far you take the fence with you.

6th Nov 2012 5:27pm

ZeDefender

Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

EGR + Scan/Ultragauge threads:
http://www.defender2.net/forum/topic7660.html?highlight=scangauge
http://www.defender2.net/forum/topic12111....=scangauge
http://www.defender2.net/forum/topic14806....ngauge+egr

Fuel is recalibrated using the Fillup mode. Fill the tank then choose MORE - FILLUP - DONE - SAVE
Then run until the tank is roughly 1/4 full and fill it. Then choose MORE - FILLUP - adjust to the amount you put in - DONE - SAVE

Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...

6th Nov 2012 5:40pm

BruceT

Member Since: 01 Nov 2010
Location: South Africa
Posts: 518

Naks wrote:
BruceT wrote:
Braydog wrote:
I am not so concerned with fuel consumption as long as it performs well. Should I be considering any other upgrades to coincide with a remap to ensure reliability, especially in a hot climate like Austalia

We also have a hot climate in South Africa and the first thing I did was to put a Allisport Intercooler onto my vehicle.

I'm getting an Allisport intercooler too. Consumption is already down with the BAS remap, expecting a little bit more reduction with the intercooler.

Good choice Naks! Their service is not great but their product is brilliant......I suppose much like many other English companies I've dealt with (mail order)

6th Nov 2012 6:55pm

ZeDefender

Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

My mate Thomas has almost convinced me to go with his:
http://www.offroadservice.net/defender-tun...fender.php
Different colour to the Allisport one, just built in Austria with fewer guarantee issues for "us Germans"

Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...

6th Nov 2012 7:56pm

big steve

Member Since: 24 Dec 2009
Location: hertfordshire
Posts: 2456

2015 Defender 90 Puma 2.2 HT Montalcino Red

Allisport are very good at what they produce but just a shame he can't keep up with the orders he takes on its just a waiting game

But worth it 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P
hybrid turbo in build -done ready to fit
ashcroft atb in transfer box
6 speed auto in build

6th Nov 2012 8:47pm

me@td5.org

Member Since: 16 Jan 2011
Location: Warwick
Posts: 856

Black is not a good colour for an intercooler. Sunlight through the grill will warm it up more than the change in colour will increase radiation of heat..

6th Nov 2012 8:58pm

ZeDefender

Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

But will it shine through the aircon? Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...

6th Nov 2012 9:11pm

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