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Discussion Starter #1
Hello ... I have a 62 plate T5.1 140 BHP.
Mileage 155000 , I heard that remapping increases fuel economy and obviously power and torque.

Question- if I was to remap to 185 BHP and this is the figure some specialist say this is what could achieved , my concerne is the additional strain on the engine because of my high mileage.
Does anyone have any advise to share please?
Thanks (y)
 

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I heard that remapping increases fuel economy and obviously power and torque.
If you heard that, it was probably from a company that does remapping!

The reality is that, although there is the possibility of making small increases to MPG by making the van dirtier, they cannot improve both economy and power at the same time without defying the laws of physics.

Why? Well obviously it's in VW's interests to get the best fuel economy out of all of their models - because MPG is a significant buying factor for any fleet buyer - so the factory map will have been created with MPG as one of the most important outcomes. But one of the things that gets in the way of that a little are the emissions limits. A remapper can choose not to be bound by these, and so may have a little more leeway if they are prepared to have higher (mainly NOx) emissions.

The amount of leeway is relatively small, so any gains you get are likely to be minimal - but a good remap will probably make the van a lot nicer to drive anyway.
 

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had my 140 DSG done by pendle at around 96,000, it's on 140,000 now and been fine.
before
after
I had the DPF removed and got 176-179 depending on which figure you take off the graph. Just noticed the dates on the printouts, ignore them they are wrong it was around December 2014
I wouldn't worry about the extra strain on the engine, infact you might argue there would be less strain on the engine as you have to use the throttle less to achieve the same result once it's re-mapped, but then you have the option to put your foot down and go faster if you want. and I get 500 miles from a full tank, (from full to fumes, light comes on at 450ish) so thats about 32.5mpg. I didn't really have it long before I got it done as i was impatient so have nothing to compare it against!
 

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I have more power from mapping and you can get better mpg at the same time
But it depends on how you drive it
The increase in torque allows for driving in higher gears at lower rpm
 

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I had the DPF removed
I forgot to mention - the DPF alone takes (IIRC) several percent on average off the MPG, so having it removed would probably make a worthwhile difference. Except that it's illegal to do that and drive it on public roads, so that's academic anyway!
 

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From experience my 5.1 with the same engine which was mapped to around 180. There was a noticeable difference in power and improved MPG due to having to change gear less frequently. No issues to report after 3 years. Would I go back to a factory map - no.
 

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Discussion Starter #8
If you heard that, it was probably from a company that does remapping!

The reality is that, although there is the possibility of making small increases to MPG by making the van dirtier, they cannot improve both economy and power at the same time without defying the laws of physics.

Why? Well obviously it's in VW's interests to get the best fuel economy out of all of their models - because MPG is a significant buying factor for any fleet buyer - so the factory map will have been created with MPG as one of the most important outcomes. But one of the things that gets in the way of that a little are the emissions limits. A remapper can choose not to be bound by these, and so may have a little more leeway if they are prepared to have higher (mainly NOx) emissions.

The amount of leeway is relatively small, so any gains you get are likely to be minimal - but a good remap will probably make the van a lot nicer to drive anyway.
Thanks for your comments .
 

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had my 140 DSG done by pendle at around 96,000, it's on 140,000 now and been fine.
before
after
I had the DPF removed and got 176-179 depending on which figure you take off the graph. Just noticed the dates on the printouts, ignore them they are wrong it was around December 2014
I wouldn't worry about the extra strain on the engine, infact you might argue there would be less strain on the engine as you have to use the throttle less to achieve the same result once it's re-mapped, but then you have the option to put your foot down and go faster if you want. and I get 500 miles from a full tank, (from full to fumes, light comes on at 450ish) so thats about 32.5mpg. I didn't really have it long before I got it done as i was impatient so have nothing to compare it against!
Can i ask what the remap cost? Pendle are about half an hour from mine, so I'd be going there, when the time comes.

Sent from my SM-G920F using Tapatalk
 

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Had my 2013 140bhp remapped to 175bhp. Well worth doing. Fuel economy depends on how you drive it and if you choose to use the extra torque for ragging it around or to help you cruise at the most economical speed. The heavy camper immediately felt less laboured up the hills, less gear changing too.

Mines a fully converted camper with pop top and fully loaded on a run to the south of france and back I get 35mpg ish which seems pretty go for a heavy vehicle loaded up with 5 people and all their camping gear.
 

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I've had my T5.1 remapped through Revo, gone from 84bhp to 170bhp and it's such a massive improvement. Slightly better mpg but the increase power makes it much easier to drive.
Reason I went with Revo is they write maps that look after your engine etc, for example mine is only 5 speed so they limit the torque. Map was £400 +vat.
I've mapped previous cars too, you can increase power and economy, simply put with more power you're not accelerating as long to get to the speed limit.
 

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people say go with a well known mapper but what’s to stop someone copying them and flogging for half the price? I get the argument that the map is tweaked for the particular vehicle but oem maps are all the same.
 

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people say go with a well known mapper but what’s to stop someone copying them and flogging for half the price? I get the argument that the map is tweaked for the particular vehicle but oem maps are all the same.
I'd go for a mapper that has their own workshop, a rolling road, and a good reputation and good knowledge of your vehicle.
steer well clear of the mobile mappers that come to you, I have had good and bad results from these, its very hit and miss. they are cheaper for a reason, the franchised ones have overheads to pay and not all the money you pay goes to them so don't expect them to spend more than 5 minutes checking before they just fire the map on and **** off!
first map I ever had was from an outfit like this, and it was great for my car I was chuffed to bits. but I recommended him to several friends, and none of theirs was any good, and there was no comeback!
 

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I've had my T5.1 remapped through Revo, gone from 84bhp to 170bhp and it's such a massive improvement. Slightly better mpg but the increase power makes it much easier to drive.
Reason I went with Revo is they write maps that look after your engine etc, for example mine is only 5 speed so they limit the torque. Map was £400 +vat.
I've mapped previous cars too, you can increase power and economy, simply put with more power you're not accelerating as long to get to the speed limit.
wow that’s some jump in bhp, same As what the 140bhp’s map to, must be a completly different drive now, shame the 140’s don’t give the same results.
 
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